Indiana Administrative Code › Title 327 - WATER POLLUTION CONTROL DIVISION › Article 8 - PUBLIC WATER SUPPLY › Rule 2.1 - Consumer Confidence Reports › Section 2.1-17 - Drinking water violations; standard health effects language for public notice

Current through July 10, 2024
Authority: IC 13-13-5; IC
				  13-14-8-2;
				  IC
				  13-14-8-7; IC
				  13-18-3-1; IC
				  13-18-3-2;
				  IC
				  13-18-16-8; IC
				  13-18-16-9
Affected: IC 13-18-2; IC 13-18-16
Sec. 17.
A PWS shall comply with the standard health effects language
				  for public notification contained in the following table:
Table 17. Standard Health Effects Language for Public
				  Notification
Contaminant
MCLG mg/L
MCL mg/L
Standard Health Effects Language for Public
							 Notification
Drinking Water Regulations:
A. Microbiological Contaminants, Surface
							 Water Treatment Rule, Interim Enhanced Surface Water Treatment Rule, and Long
							 Term 1 Enhanced Surface Water Treatment Rule (LT1ESWTR)
1a. Total coliform
							 bacteria10
0
See footnote1
Coliforms are bacteria that are naturally present in
							 the environment and are used as an indicator that other, potentially harmful,
							 bacteria may be present. Coliforms were found in more samples than allowed, and
							 this was a warning of potential problems.
1a(1). Total coliform
							 bacteria11
N/A
See footnote1
Coliforms are bacteria that are naturally present in
							 the environment and are used as an indicator that other, potentially harmful,
							 waterborne pathogens may be present or that a potential pathway exists through
							 which contamination may enter the drinking water distribution system. We found
							 coliforms indicating the need to look for potential problems in water treatment
							 or distribution. When this occurs, we are required to conduct one (1) or more
							 assessments to identify problems and to correct any problems that are found
							 during these assessments.
1b. Fecal coliform/E.
							 coli10
0
0
Fecal coliforms and E. coli are bacteria whose
							 presence indicates that the water may be contaminated with human or animal
							 wastes. Microbes in these wastes can cause short term effects, such as
							 diarrhea, cramps, nausea, headaches, or other symptoms. They may pose a special
							 health risk for infants, young children, some of the elderly, and people with
							 severely compromised immune systems.
1b(1). E. coli11
0
Routine and repeat samples are total coliform-positive
							 and either is E. coli-positive or the PWS fails to take repeat samples
							 following E. coli-positive routine sample or the PWS fails to analyze total
							 coliform-positive repeat samples for E. coli.
E. coli are bacteria whose presence indicates that the
							 water may be contaminated with human or animal wastes. Human pathogens in these
							 wastes can cause short term effects, such as diarrhea, cramps, nausea,
							 headaches, or other symptoms. They may pose a greater health risk for infants,
							 young children, the elderly, and people with severely compromised immune
							 systems.
1c. Fecal indicators (enterococci or coliphage)
Fecal indicators are microbes whose
							 presence indicates that the water may be contaminated with human or animal
							 wastes. Microbes in these wastes can cause short term health effects, such as
							 diarrhea, cramps, nausea, headaches, or other symptoms. They may pose a special
							 health risk for infants, young children, some of the elderly, and people with
							 severely compromised immune systems.
i. E. coli
0
TT
ii. Enterococci
None
TT
iii. Coliphage
None
TT
1d. Ground Water Rule TT violations
None
TT
Inadequately treated or inadequately protected water
							 may contain disease-causing organisms. These organisms can cause symptoms such
							 as diarrhea, nausea, cramps, and associated headaches.
1e. Coliform assessment or corrective action, or both,
							 violations of 40 CFR 141, Subpart Y* (Revised Total Coliform Rule
							 (RTCR))11
N/A
TT
Coliforms are bacteria that are naturally present in
							 the environment and are used as an indicator that other, potentially harmful,
							 waterborne pathogens may be present or that a potential pathway exists through
							 which contamination may enter the drinking water distribution system. We found
							 coliforms indicating the need to look for potential problems in water treatment
							 or distribution. When this occurs, we are required to conduct assessments to
							 identify problems and to correct any problems that are found. [THE SYSTEM IS
							 REQUIRED TO USE THE FOLLOWING APPLICABLE SENTENCES:] We failed to conduct the
							 required assessment. We failed to correct all identified sanitary defects that
							 were found during the assessment or assessments.
1f. E. coli assessment or corrective action, or both,
							 violations of 40 CFR 141, Subpart Y* (RTCR)11
N/A
TT
E. coli are bacteria whose presence indicates that the
							 water may be contaminated with human or animal wastes. Human pathogens in these
							 wastes can cause short term effects, such as diarrhea, cramps, nausea,
							 headaches, or other symptoms. They may pose a greater health risk for infants,
							 young children, the elderly, and people with severely compromised immune
							 systems. We violated the standard for E. coli indicating the need to look for
							 potential problems in water treatment or distribution. When this occurs, we are
							 required to conduct a detailed assessment to identify problems and to correct
							 any problems that are found. [THE SYSTEM IS REQUIRED TO USE THE FOLLOWING
							 APPLICABLE SENTENCES:] We failed to conduct the required assessment. We failed
							 to correct all identified sanitary defects that were found during the
							 assessment that we conducted.
1g. E. coli11
0
See footnote12
E. coli are bacteria whose presence indicates that the
							 water may be contaminated with human or animal wastes. Human pathogens in these
							 wastes can cause short term effects, such as diarrhea, cramps, nausea,
							 headaches, or other symptoms. They may pose a greater health risk for infants,
							 young children, the elderly, and people with severely compromised immune
							 systems.
1h. Seasonal system TT violations of 40 CFR 141,
							 Subpart Y* (RTCR)11
N/A
TT
The failure to monitor for total coliforms or E. coli
							 prior to serving water to the public requires the use of mandatory language
							 found in section 11(c)(2) of this rule. Failure to complete actions other than
							 monitoring for total coliforms or E. coli prior to serving water to the public
							 requires the use of mandatory language found in section 11(a) of this rule.
2a. Turbidity (MCL)2
None
1 NTU/5 NTU
Turbidity has no health effects. However, turbidity
							 can interfere with disinfection and provide a medium for microbial growth.
							 Turbidity may indicate the presence of disease-causing organisms. These
							 organisms include bacteria, viruses, and parasites that can cause symptoms,
							 such as nausea, cramps, diarrhea, and associated headaches.
2b. Turbidity (SWTR TT, IESWTR TT, and LT1ESWTR
							 TT)2
None
TT
Turbidity has no health effects. However, turbidity
							 can interfere with disinfection and provide a medium for microbial growth.
							 Turbidity may indicate the presence of disease-causing organisms. These
							 organisms include bacteria, viruses, and parasites that can cause symptoms,
							 such as nausea, cramps, diarrhea, and associated headaches.
2c. Giardia lamblia
0
TT4
Inadequately treated water may contain
							 disease-causing organisms. These organisms include bacteria, viruses, and
							 parasites that can cause symptoms, such as nausea, cramps, diarrhea, and
							 associated headaches.
2d. Viruses
2e. Heterotrophic plate county (HPC)
							 bacteria3
2f. Legionella
2g. Cryptosporidium
B. Inorganic Chemicals (IOCs)
3. Antimony
0.006
0.006
Some people who drink water containing antimony well
							 in excess of the MCL over many years could experience increases in blood
							 cholesterol and decreases in blood sugar.
4. Arsenic5
0
0.01
Some people who drink water containing arsenic in
							 excess of the MCL over many years could experience skin damage or problems with
							 their circulatory system and may have an increased risk of getting cancer.
5. Asbestos (>10 µm)
7 MFL
7 MFL
Some people who drink water containing asbestos in
							 excess of the MCL over many years may have an increased risk of developing
							 benign intestinal polyps.
6. Barium
2
2
Some people who drink water containing barium in
							 excess of the MCL over many years could experience an increase in their blood
							 pressure.
7. Beryllium
0.004
0.004
Some people who drink water containing beryllium well
							 in excess of the MCL over many years could develop intestinal lesions.
8. Cadmium
0.005
0.005
Some people who drink water containing cadmium in
							 excess of the MCL over many years could experience kidney damage.
9. Chromium (total)
0.1
0.1
Some people who use water containing chromium well in
							 excess of the MCL over many years could experience allergic dermatitis.
10. Cyanide
0.2
0.2
Some people who drink water containing cyanide well in
							 excess of the MCL over many years could experience nerve damage or problems
							 with their thyroid.
11. Fluoride
4.0
4.0
Some people who drink water containing fluoride in
							 excess of the MCL over many years could get bone disease, including pain and
							 tenderness of the bones. Fluoride in drinking water at half the MCL or more may
							 cause mottling of children's teeth, usually in children less than nine (9)
							 years of age. Mottling, also known as dental fluorosis, may include brown
							 staining or pitting of the teeth, or both, and occurs only in developing teeth
							 before they erupt from the gums.
12. Mercury (inorganic)
0.002
0.002
Some people who drink water containing inorganic
							 mercury well in excess of the MCL over many years could experience kidney
							 damage.
13. Nitrate
10
10
Infants below six (6) months of age who drink water
							 containing nitrate in excess of the MCL could become seriously ill and, if
							 untreated, may die. Symptoms include shortness of breath and blue baby
							 syndrome.
14. Nitrite
1
1
Infants below six (6) months of age who drink water
							 containing nitrite in excess of the MCL could become seriously ill and, if
							 untreated, may die. Symptoms include shortness of breath and blue baby
							 syndrome.
15. Total nitrate and nitrite
10
10
Infants below six (6) months of age who drink water
							 containing nitrate and nitrite in excess of the MCL could become seriously ill
							 and, if untreated, may die. Symptoms include shortness of breath and blue baby
							 syndrome.
16. Selenium
0.05
0.05
Selenium is an essential nutrient. However, some
							 people who drink water containing selenium in excess of the MCL over many years
							 could experience hair or fingernail losses, numbness in fingers or toes, or
							 problems with their circulation.
17. Thallium
0.0005
0.002
Some people who drink water containing thallium in
							 excess of the MCL over many years could experience hair loss, changes in their
							 blood, or problems with their kidneys, intestines, or liver.
C. Lead and Copper Rule
18. Lead
0
TT
Infants and children who drink water containing lead
							 in excess of the action level could experience delays in their physical or
							 mental development. Children could show slight deficits in attention span and
							 learning abilities. Adults who drink this water over many years could develop
							 kidney problems or high blood pressure.
19. Copper
1.3
TT
Copper is an essential nutrient, but some people who
							 drink water containing copper in excess of the action level over a relatively
							 short amount of time could experience gastrointestinal distress. Some people
							 who drink water containing copper in excess of the action level over many years
							 could suffer liver or kidney damage. People with Wilson's Disease should
							 consult their personal doctor.
D. Synthetic Organic Chemicals (SOCs)
20. 2,4-D
0.07
0.07
Some people who drink water containing the weed killer
							 2,4-D well in excess of the MCL over many years could experience problems with
							 their kidneys, liver, or adrenal glands.
21. 2,4,5-TP (silvex)
0.05
0.05
Some people who drink water containing silvex in
							 excess of the MCL over many years could experience liver problems.
22. Alachlor
0
0.002
Some people who drink water containing alachlor in
							 excess of the MCL over many years could have problems with their eyes, liver,
							 kidneys, or spleen, or experience anemia, and may have an increased risk of
							 getting cancer.
23. Atrazine
0.003
0.003
Some people who drink water containing atrazine well
							 in excess of the MCL over many years could experience problems with their
							 cardiovascular system or reproductive difficulties.
24. Benzo(a)pyrene (PAHs)
0
0.0002
Some people who drink water containing benzo(a)pyrene
							 in excess of the MCL over many years may experience reproductive difficulties
							 and may have an increased risk of getting cancer.
25. Carbofuran
0.04
0.04
Some people who drink water containing carbofuran in
							 excess of the MCL over many years could experience problems with their blood or
							 nervous or reproductive systems.
26. Chlordane
0
0.002
Some people who drink water containing chlordane in
							 excess of the MCL over many years could experience problems with their liver or
							 nervous system and may have an increased risk of getting cancer.
27. Dalapon
0.2
0.2
Some people who drink water containing dalapon well in
							 excess of the MCL over many years could experience minor kidney changes.
28. Di (2-ethylhexyl) adipate
0.4
0.4
Some people who drink water containing di
							 (2-ethylhexyl) adipate well in excess of the MCL over many years could
							 experience general toxic effects or reproductive difficulties.
29. Di (2-ethylhexyl) phthalate
0
0.006
Some people who drink water containing di
							 (2-ethylhexyl) phthalate in excess of the MCL over many years may have problems
							 with their liver, or experience reproductive difficulties, and may have an
							 increased risk of getting cancer.
30. Dibromochloropropane (DBCP)
0
0.0002
Some people who drink water containing DBCP in excess
							 of the MCL over many years could experience reproductive difficulties and may
							 have an increased risk of getting cancer.
31. Dinoseb
0.007
0.007
Some people who drink water containing dinoseb well in
							 excess of the MCL over many years could experience reproductive difficulties.
32. Dioxin (2,3,7,8-TCDD)
0
3×10-8
Some people who drink water containing dioxin in
							 excess of the MCL over many years could experience reproductive difficulties
							 and may have an increased risk of getting cancer.
33. Diquat
0.02
0.02
Some people who drink water containing diquat in
							 excess of the MCL over many years could get cataracts.
34. Endothall
0.1
0.1
Some people who drink water containing endothall in
							 excess of the MCL over many years could experience problems with their stomach
							 or intestines.
35. Endrin
0.002
0.002
Some people who drink water containing endrin in
							 excess of the MCL over many years could experience liver problems.
36. Ethylene dibromide
0
0.00005
Some people who drink water containing ethylene
							 dibromide in excess of the MCL over many years could experience problems with
							 their liver, stomach, reproductive system, or kidneys and may have an increased
							 risk of getting cancer.
37. Glyphosate
0.7
0.7
Some people who drink water containing glyphosate in
							 excess of the MCL over many years could experience problems with their kidneys
							 or reproductive difficulties.
38. Heptachlor
0
0.0004
Some people who drink water containing heptachlor in
							 excess of the MCL over many years could experience liver damage and may have an
							 increased risk of getting cancer.
39. Heptachlor epoxide
0
0.0002
Some people who drink water containing heptachlor
							 epoxide in excess of the MCL over many years could experience liver damage and
							 may have an increased risk of getting cancer.
40. Hexachlorobenzene
0
0.001
Some people who drink water containing
							 hexachlorobenzene in excess of the MCL over many years could experience
							 problems with their liver or kidneys, or adverse reproductive effects, and may
							 have an increased risk of getting cancer.
41. Hexachlorocyclo-pentadiene
0.05
0.05
Some people who drink water containing
							 hexachlorocyclopentadiene well in excess of the MCL over many years could
							 experience problems with their kidneys or stomach.
42. Lindane
0.0002
0.0002
Some people who drink water containing lindane in
							 excess of the MCL over many years could experience problems with their kidneys
							 or liver.
43. Methoxychlor
0.04
0.04
Some people who drink water containing methoxychlor in
							 excess of the MCL over many years could experience reproductive difficulties.
44. Oxamyl (vydate)
0.2
0.2
Some people who drink water containing oxamyl in
							 excess of the MCL over many years could experience slight nervous system
							 effects.
45. Pentachlorophenol
0
0.001
Some people who drink water containing
							 pentachlorophenol in excess of the MCL over many years could experience
							 problems with their liver or kidneys and may have an increased risk of getting
							 cancer.
46. Picloram
0.5
0.5
Some people who drink water containing picloram in
							 excess of the MCL over many years could experience problems with their liver.
47. Polychlorinated biphenyls (PCBs)
0
0.0005
Some people who drink water containing PCBs in excess
							 of the MCL over many years could experience changes in their skin, problems
							 with their thymus gland, immune deficiencies, or reproductive or nervous system
							 difficulties and may have an increased risk of getting cancer.
48. Simazine
0.004
0.004
Some people who drink water containing simazine in
							 excess of the MCL over many years could experience problems with their blood.
49. Toxaphene
0
0.003
Some people who drink water containing toxaphene in
							 excess of the MCL over many years could have problems with their kidneys,
							 liver, or thyroid and may have an increased risk of getting cancer.
E. Volatile Organic Chemicals (VOCs)
50. Benzene
0
0.005
Some people who drink water containing benzene in
							 excess of the MCL over many years could experience anemia or a decrease in
							 blood platelets and may have an increased risk of getting cancer.
51. Carbon tetrachloride
0
0.005
Some people who drink water containing carbon
							 tetrachloride in excess of the MCL over many years could experience problems
							 with their liver and may have an increased risk of getting cancer.
52. Chlorobenzene (monochlorobenzene)
0.1
0.1
Some people who drink water containing chlorobenzene
							 in excess of the MCL over many years could experience problems with their liver
							 or kidneys.
53. o-Dichlorobenzene
0.6
0.6
Some people who drink water containing
							 o-dichlorobenzene well in excess of the MCL over many years could experience
							 problems with their liver, kidneys, or circulatory systems.
54. p-Dichlorobenzene
0.075
0.075
Some people who drink water containing
							 p-dichlorobenzene in excess of the MCL over many years could experience anemia,
							 damage to their liver, kidneys, or spleen or changes in their blood.
55. 1,2-Dichloroethane
0
0.005
Some people who drink water containing
							 1,2-dichloroethane in excess of the MCL over many years may have an increased
							 risk of getting cancer.
56. 1,1-Dichloroethylene
0.007
0.007
Some people who drink water containing
							 1,1-dichloroethylene in excess of the MCL over many years could experience
							 problems with their liver.
57. cis-1,2-Dichloroethylene
0.07
0.07
Some people who drink water containing
							 cis-1,2-dichloroethylene in excess of the MCL over many years could experience
							 problems with their liver.
58. trans-1,2-Dichloroethylene
0.1
0.1
Some people who drink water containing
							 trans-1,2-dichloroethylene well in excess of the MCL over many years could
							 experience problems with their liver.
59. Dichloromethane
0
0.005
Some people who drink water containing dichloromethane
							 in excess of the MCL over many years could have liver problems and may have an
							 increased risk of getting cancer.
60. 1,2-Dichloropropane
0
0.005
Some people who drink water containing
							 1,2-dichloropropane in excess of the MCL over many years may have an increased
							 risk of getting cancer.
61. Ethylbenzene
0.7
0.7
Some people who drink water containing ethylbenzene
							 well in excess of the MCL over many years could experience problems with their
							 liver or kidneys.
62. Styrene
0.1
0.1
Some people who drink water containing styrene well in
							 excess of the MCL over many years could have problems with their liver,
							 kidneys, or circulatory system.
63. Tetrachloroethylene
0
0.005
Some people who drink water containing
							 tetrachloroethylene in excess of the MCL over many years could have problems
							 with their liver and may have an increased risk of getting cancer.
64. Toluene
1
1
Some people who drink water containing toluene well in
							 excess of the MCL over many years could have problems with their nervous
							 system, kidneys, or liver.
65. 1,2,4-Trichlorobenzene
0.07
0.07
Some people who drink water containing
							 1,2,4-trichlorobenzene well in excess of the MCL over many years could
							 experience changes in their adrenal glands.
66. 1,1,1-Trichloroethane
0.2
0.2
Some people who drink water containing
							 1,1,1-trichloroethane in excess of the MCL over many years could experience
							 problems with their liver, nervous system, or circulatory system.
67. 1,1,2-Trichloroethane
0.003
0.005
Some people who drink water containing
							 1,1,2-trichloroethane well in excess of the MCL over many years could have
							 problems with their liver, kidneys, or immune systems.
68. Trichloroethylene
0
0.005
Some people who drink water containing
							 trichloroethylene in excess of the MCL over many years could experience
							 problems with their liver and may have an increased risk of getting cancer.
69. Vinyl chloride
0
0.002
Some people who drink water containing vinyl chloride
							 in excess of the MCL over many years may have an increased risk of getting
							 cancer.
70. Xylenes (total)
10
10
Some people who drink water containing xylenes in
							 excess of the MCL over many years could experience damage to their nervous
							 system.
F. Radioactive Contaminants
71. Beta/photon emitters
0
4 mrem/yr
Certain minerals are radioactive and may emit forms of
							 radiation known as photons and beta radiation. Some people who drink water
							 containing beta particle and photon radioactivity in excess of the MCL over
							 many years may have an increased risk of getting cancer.
72. Alpha emitters
0
15 pCi/l
Certain minerals are radioactive and may emit a form
							 of radiation known as alpha radiation. Some people who drink water containing
							 alpha emitters in excess of the MCL over many years may have an increased risk
							 of getting cancer.
73. Combined radium (226 and 228)
0
5 pCi/l
Some people who drink water containing radium 226 or
							 228 in excess of the MCL over many years may have an increased risk of getting
							 cancer.
74. Uranium
0
30 µg/l
Some people who drink water containing uranium in
							 excess of the MCL over many years may have an increased risk of getting cancer
							 and kidney toxicity.
G. Disinfection Byproducts (DBPs): Where
							 disinfection is used in the treatment of drinking water, disinfectants combine
							 with organic and inorganic matter present in water to form chemicals called
							 DBPs. U.S. EPA sets standards for controlling the levels of disinfectants and
							 DBPs in drinking water including THMs and HAA58.
75. TTHMs
N/A
0.0806,9
Some people who drink water containing THMs in excess
							 of the MCL over many years may experience problems with their liver, kidneys,
							 or central nervous system and may have an increased risk of getting cancer.
76. HAA5
N/A
0.0607
Some people who drink water containing HAA5 in excess
							 of the MCL over many years may have an increased risk of getting cancer.
77. Bromate
0
0.010
Some people who drink water containing bromate in
							 excess of the MCL over many years may have an increased risk of getting cancer.
78. Chlorite
0.08
1.0
Some infants and young children who drink water
							 containing chlorite in excess of the MCL could experience nervous system
							 effects. Similar effects may occur in fetuses of pregnant women who drink water
							 containing chlorite in excess of the MCL. Some people may experience anemia.
79. Chlorine
4 MRDLG
4.0 MRDL
Some people who use drinking water containing chlorine
							 well in excess of the MRDL could experience irritating effects to their eyes
							 and nose. Some people who drink water containing chlorine well in excess of the
							 MRDL could experience stomach discomfort.
80. Chloramines
4 MRDLG
4.0 MRDL
Some people who use drinking water containing
							 chloramines well in excess of the MRDL could experience irritating effects to
							 their eyes and nose. Some people who drink water containing chloramines well in
							 excess of the MRDL could experience stomach discomfort or anemia.
81a. Chlorine dioxide, where any two consecutive daily
							 samples taken at the entrance to the distribution system are above the MRDL
0.8 MRDLG
0.8 MRDL
Some infants and young children who drink water
							 containing chlorine dioxide in excess of the MRDL could experience nervous
							 system effects. Similar effects may occur in fetuses of pregnant women who
							 drink water containing chlorine dioxide in excess of the MRDL. Some people may
							 experience anemia. Add for public notification only: The chlorine dioxide
							 violations reported today are the result of exceedances at the treatment
							 facility only, not within the distribution system that delivers water to
							 consumers. Continued compliance with chlorine dioxide levels within the
							 distribution system minimizes the potential risk of these violations to
							 consumers.
81b. Chlorine dioxide, where one or more distribution
							 system samples are above the MRDL
0.8 MRDLG
0.8 MRDL
Some infants and young children who drink water
							 containing chlorine dioxide in excess of the MRDL could experience nervous
							 system effects. Similar effects may occur in fetuses of pregnant women who
							 drink water containing chlorine dioxide in excess of the MRDL. Some people may
							 experience anemia. Add for public notification only: The chlorine dioxide
							 violations reported today include exceedances of the U.S. EPA standard within
							 the distribution system that delivers water to consumers. Violations of the
							 chlorine dioxide standard within the distribution system may harm human health
							 based on short term exposures. Certain groups, including fetuses, infants, and
							 young children, may be especially susceptible to nervous system effects from
							 excessive chlorine dioxide exposure.
82. Control of DBP precursors (TOC)
None
TT
TOC has no health effects. However, TOC provides a
							 medium for the formation of DBPs. These byproducts include THMs and HAA5.
							 Drinking water containing these byproducts in excess of the MCL may lead to
							 adverse health effects, liver or kidney problems, or nervous system effects and
							 may lead to an increased risk of getting cancer.
H. Other Treatment Techniques
83. Acrylamide
0
TT
Some people who drink water containing high levels of
							 acrylamide over a long period of time could have problems with their nervous
							 system or blood and may have an increased risk of getting cancer.
84. Epichlorohydrin
0
TT
Some people who drink water containing high levels of
							 epichlorohydrin over a long period of time could experience stomach problems
							 and may have an increased risk of getting cancer.
Key:
MCLG = Maximum contaminant level goal.
MCL = Maximum contaminant level.
MRDL = Maximum residual disinfectant level.
MRDLG = Maximum residual disinfectant level goal.
NTU = Nephelometric turbidity unit.
TT = Treatment technique.
MFL = Millions of fiber per liter.
Action Level (Lead) = 0.015 mg/L.
Action Level (Copper) = 1.3 mg/L.
mrem = millirems per year.
pCi/L = picocuries per liter.
1 For a PWS analyzing at least forty (40)
				samples per month, not more than five percent (5.0%) of the monthly samples may
				be positive for total coliforms. For a PWS analyzing fewer than forty (40)
				samples per month, not more than one (1) sample per month may be positive for
				total coliforms.
2 There are
				various regulations that set turbidity standards for different types of PWSs,
				including the 1989 Surface Water Treatment Rule, the 1998 Interim Enhanced
				Surface Water Treatment Rule, and the 2001 Long Term 1 Enhanced Surface Water
				Treatment Rule. The following apply:
(1) A
				PWS subject to
				327 IAC
				8-2-8.5 through
				327
				IAC 8-2-8.8 (also known as the Surface Water Treatment
				Rule (SWTR)) may not exceed five (5) NTU. In addition, in a filtered PWS,
				ninety-five percent (95%) of samples each month must not exceed five-tenths
				(0.5) NTU in a PWS using conventional or direct filtration and must not exceed
				one (1) NTU in a PWS using slow sand or diatomaceous earth filtration or other
				filtration technologies approved by the commissioner.
(2) For a PWS subject to
				327
				IAC 8-2.6-1,
				327
				IAC 8-2.6-2,
				327 IAC
				8-2.6-3,
				327 IAC
				8-2.6-4, and
				327
				IAC 8-2.6-5 (also known as the Interim Enhanced
				Surface Water Treatment Rule (IESWTR)) serving at least ten thousand (10,000)
				individuals using surface water or ground water under the direct influence of
				surface water that uses conventional filtration or direct filtration, after
				January 1, 2002, the turbidity level of the PWS's combined filter effluent may
				not exceed three-tenths (0.3) NTU in at least ninety-five percent (95%) of
				monthly measurements, and the turbidity level of the PWS's combined filter
				effluent must not exceed one (1) NTU at any time.
(3) A PWS subject to
				327
				IAC 8-2.6-1,
				327
				IAC 8-2.6-2,
				327 IAC
				8-2.6-3,
				327 IAC
				8-2.6-4, and
				327
				IAC 8-2.6-5, the IESWTR, using technologies other than
				conventional, direct, slow sand, or diatomaceous earth filtration must meet
				turbidity limits set by the commissioner.
(4) For a PWS subject to
				327
				IAC 8-2.6-1 through
				327
				IAC 8-2.6-5 (also known as the Long Term 1 Enhanced
				Surface Water Treatment Rule (LT1ESWTR)) serving fewer than ten thousand
				(10,000) individuals using surface water or ground water under the direct
				influence of surface water that uses conventional filtration or direct
				filtration, after January 1, 2005, the turbidity level of the PWS's combined
				filter effluent may not exceed three-tenths (0.3) NTU in at least ninety-five
				percent (95%) of monthly measurements, and the turbidity level of the PWS's
				combined filter effluent must not exceed one (1) NTU at any time.
(5) A PWS subject to
				327
				IAC 8-2.6-1 through
				327
				IAC 8-2.6-5, the LT1ESWTR, using technologies other
				than conventional, direct, slow sand, or diatomaceous earth filtration must
				meet turbidity limits set by the commissioner.