62-302.530, Criteria for Surface Water Quality Classifications 

Class III: Recreation, Propagation and 

Maintenance of a Healthy, WellBalanced Population of Fish and 

Wildlife 

Parameter Units 

Class I: 

 Potable Water 

Supply 

Class II: Shellfish 

Propagation or 

Harvesting Predominantly Fresh Waters Predominantly Marine Waters 

Class IV: Agricu

tural Water Sup

plies 

(1) Alkalinity Milligrams/L as 

CaCO3

Shall not be 

depressed below 

20 

Shall not be 

depressed below 20 

< 600 

(2) Aluminum Milligrams/L < 1.5 < 1.5 (3) Ammonia  (un-ionized) 

Milligrams/L as NH3

< 0.02 < 0.02 

(4) Antimony Micrograms/L < 14.0 < 4,300 < 4,300 < 4,300 (5) (a) Arsenic  (total) 

Micrograms/L ≤ 10 < 50 < 50 < 50 < 50 

(5) (b) Arsenic  (trivalent) 

Micrograms/L measured as total recoverable 

Arsenic 

< 36 < 36 
Parameter Units Class I Class II Class III: 

 Fresh 

Class III: 

Marine 

Class IV 

Notes: (1) "ln H" means the natural logarithm of total hardness expressed as milligrams/L of CaCO

3. For metals criteria involving 

hardness, the hardness shall be set at 25 mg/L if actual hardness is < 25 mg/L and set at 400 mg/L if actual hardness is > 400 mgprotective of human health not of aquatic life. (3) For application of dissolved metals criteria see 62-302.500(2)(d), F.A.C. 

(6) Bacteriological Quality (Fecal Coliform Bacteria) 

Number per 100 ml (Most Probable 

Number (MPN) or Membrane Filter (MF)) 

MPN or MF counts shall not exceed a monthly average of 

200, nor exceed 400 in 10% of the samples, nor exceed 800 on any one day. Monthly averages shall be expressed as geometric means based on a minimum of 5 samples taken over a 30 day period. 

MPN shall not exceed a median 

value of 14 with not more than 10% of the samples exceeding 43, nor exceed 800 on any one day. 

MPN or MF counts shall not exceed a monthly average of 

200, nor exceed 400 in 10% of the samples, nor exceed 800 on any one day. Monthly averages shall be expressed as geometric means based on a minimum of 10 samples taken over a 30 day period. 

MPN or MF counts shall not exceed a monthly average of 

200, nor exceed 400 in 10% of the samples, nor exceed 800 on any one day. Monthly averages shall be expressed as geometric means based on a minimum of 10 samples taken over a 30 day period. 

(7) Barium Milligrams/L 

< 1

(8) Benzene Micrograms/L 

< 1.18 

< 71.28 annual avg.

< 71.28 annual avg. 

< 71.28 annual avg.

(9) Beryllium Micrograms/L 

< 0.0077 annual 

avg. 

< 0.13 annual avg.

< 0.13 annual avg. 

< 0.13 annual avg.

< 100 in waters 

with a hardness in mg/L of CaCO3 oless than 250 and shall not exceed 500 in harder waters 
Parameter Units Class I Class II Class III: 

 Fresh 

Class III: 

Marine 

Class IV 

Notes: (1) "ln H" means the natural logarithm of total hardness expressed as milligrams/L of CaCO

3. For metals criteria involving 

hardness, the hardness shall be set at 25 mg/L if actual hardness is < 25 mg/L and set at 400 mg/L if actual hardness is > 400 mgprotective of human health not of aquatic life. (3) For application of dissolved metals criteria see 62-302.500(2)(d), F.A.C. 

(10) Biological Integrity 

Per cent reduction of ShannonWeaver Diversity 

Index 

The Index for benthic 

macroinvertebrates shall not be reduced to less than 75% of background levels as measured using organisms retained by a U. S. Standard No. 30 sieve and collected and composited from a minimum of three Hester-Dendy type artificial substrate samplers of 0.10 to 0.15 m2 area each, incubated for a period of four weeks. 

The Index for benthic 

macroinvertebrates shall not be reduced to less than 75% of established background levels as measured using organisms retained by a U. S. Standard No. 30 sieve and collected and composited from a minimum of three natural substrate samples, taken with Ponar type samplers with minimum sampling area of 225 cm2. 

The Index for benthic 

macroinvertebrates shall not be reduced to less than 75% of established background levels as measured using organisms retained by a U. S. Standard No. 30 sieve and collected and composited from a minimum of three Hester-Dendy type artificial substrate samplers of 0.10 to 0.15 m2 area each, incubated for a period of four weeks. 

The Index for benthic 

macroinvertebrates shall not be reduced to less than 75% of established background levels as measured using organisms retained by a U. S. Standard No. 30 sieve and collected and composited from a minimum of three natural substrate samples, taken with Ponar type samplers with minimum sampling area of 225 cm2. 

(11) BOD (Biochemical Oxygen Demand) 

Shall not be increased to exceed values which would cause dissolved oxygen to be depressed 

established for each class and, in no case, shall it be great enough to produce nuisance c

(12) Boron Milligrams/L 

< 0.75 

(13) Bromates Milligrams/L 

< 100 

< 100 

(14) Bromine (free molecular) 

Milligrams/L

< 0.1 

< 0.1 
Parameter Units Class I Class II Class III: 

 Fresh 

Class III: 

Marine 

Class IV 

Notes: (1) "ln H" means the natural logarithm of total hardness expressed as milligrams/L of CaCO

3. For metals criteria involving 

hardness, the hardness shall be set at 25 mg/L if actual hardness is < 25 mg/L and set at 400 mg/L if actual hardness is > 400 mgprotective of human health not of aquatic life. (3) For application of dissolved metals criteria see 62-302.500(2)(d), F.A.C. 

(15) Cadmium Micrograms/L 

See Notes (1) and (3). 

 Cd < e(0.7409[lnH]-4.719)

< 8.8 Cd 

<

e(0.7409[lnH]-4.719)

< 8.8 

(16) Carbon tetrachloride Micrograms/L 

< 0.25 annual 

avg.;  3.0 max 

< 4.42 annual avg.

< 4.42 annual avg. 

< 4.42 annual avg.

(17) Chlorides Milligrams/L 

< 250 Not increased more 

than 10% above 

normal background. Normal daily and seasonal fluctuations shall be maintained. 

Not increased more than 10% above 

normal background. Normal daily and seasonal fluctuations shall be maintained. 

(18) Chlorine (total residual) 

Milligrams/L 

< 0.01 

< 0.01 

< 0.01 

< 0.01 

(19) (a) Chromium (trivalent) 

Micrograms/L measured as total recoverable 

Chromium See Notes (1) and (3). 

Cr (III) 

≤

e(0.819[lnH]+0.6848)

Cr (III) 

≤

e(0.819[lnH]+0.6848)

Cr (III) 

≤

e(0.819[lnH]+0.6848)

(19) (b) Chromium  (hexavalent) 

Micrograms/L See Note (3) 

< 11 

< 50 

< 11 

< 50 

< 11 
Parameter Units Class I Class II Class III: 

 Fresh 

Class III: 

Marine 

Class IV 

Notes: (1) "ln H" means the natural logarithm of total hardness expressed as milligrams/L of CaCO

3. For metals criteria involving 

hardness, the hardness shall be set at 25 mg/L if actual hardness is < 25 mg/L and set at 400 mg/L if actual hardness is > 400 mgprotective of human health not of aquatic life. (3) For application of dissolved metals criteria see 62-302.500(2)(d), F.A.C. 

(20) Chronic Toxicity (see definition in 

Section 62-302.200(4), F.A.C. and also see below, "Substances in concentrations which...") 

(21) Color, etc. (see also Minimum Criteria, Odor, Phenols, etc.) 

Color, odor, and taste producing 

substances and other deleterious substances, including other chemical compounds attributable to domestic wastes, industrial wastes, and other wastes 

Only such amoun

as will not render the waters unsuitable for agricultuirrigation, livestocwatering, industricooling, industriaprocess water supply purposes, fish survival. 

(22) Conductance, Specific 

Micromhos/cm Shall not be 

increased more 

than 50% above background or to 1275, whichever is greater. 

Shall not be increased more 

than 50% above background or to 1275, whichever is greater. 

Shall not be increased more 

than 50% above background or to 1275, whichever greater. 

(23) Copper Micrograms/L 

See Notes (1) and (3). 

 Cu 

≤

e(0.8545[lnH]-1.702) 

≤ 3.7 Cu 

≤

e(0.8545[lnH]-1.702) 

≤ 3.7 

< 500 
Parameter Units Class I Class II Class III: 

 Fresh 

Class III: 

Marine 

Class IV 

Notes: (1) "ln H" means the natural logarithm of total hardness expressed as milligrams/L of CaCO

3. For metals criteria involving 

hardness, the hardness shall be set at 25 mg/L if actual hardness is < 25 mg/L and set at 400 mg/L if actual hardness is > 400 mgprotective of human health not of aquatic life. (3) For application of dissolved metals criteria see 62-302.500(2)(d), F.A.C. 

(24) Cyanide Micrograms/L 

< 5.2 

< 1.0 

< 5.2 

< 1.0 

< 5.0 

(25) Definitions (see Section 62-302.200, F.A.C.) (26) Detergents Milligrams/L 

< 0.5 

< 0.5 

< 0.5 

< 0.5 

< 0.5 

(27) 1,1-Dichloroethylene (1,1-dichloroethene) 

Micrograms/L 

< 0.057 annual 

avg.; 

< 7.0 max 

< 3.2 annual avg. 

< 3.2 annual avg. 

< 3.2 annual avg. 

(28) Dichloromethane (methylene chloride) 

Micrograms/L 

< 4.65 annual avg.

< 1,580 annual avg.

< 1,580 annual avg. 

< 1,580 annual avg.

(29) 2,4-Dinitrotoluene Micrograms/L 

< 0.11 annual avg.

< 9.1 annual avg. 

< 9.1 annual avg. 

< 9.1 annual avg. 

(30) Dissolved Oxygen 

Milligrams/L Shall not be less 

than 5.0. Normal 

daily and seasonal fluctuations above this level shall be maintained. 

Shall not average less than 5.0 in a 

24-hour period and shall never be less than 4.0. Normal daily and seasonal fluctuations above these levels shall be maintained. 

Shall not be less than 5.0. Normal 

daily and seasonal fluctuations above these levels shall be maintained. 

Shall not average less than 5.0 in a 

24-hour period and shall never be less than 4.0. Normal daily and seasonal fluctuations above these levels shall be maintained. 

Shall not average less than 4.0 in a 

24-hour period anshall never be lesthan 3.0. 
Parameter Units Class I Class II Class III: 

 Fresh 

Class III: 

Marine 

Class IV 

Notes: (1) "ln H" means the natural logarithm of total hardness expressed as milligrams/L of CaCO

3. For metals criteria involving 

hardness, the hardness shall be set at 25 mg/L if actual hardness is < 25 mg/L and set at 400 mg/L if actual hardness is > 400 mgprotective of human health not of aquatic life. (3) For application of dissolved metals criteria see 62-302.500(2)(d), F.A.C. 

(31) Dissolved Solids 

Milligrams/L 

< 500 as a monthly 

avg.; 

< 1,000 max 

(32) Fluorides Milligrams/L 

< 1.5 

< 1.5 

< 10.0 

< 5.0 

< 10.0 

(33) "Free Froms" (see Minimum Criteria in Section 62-302.500, F.A.C.) (34) "General Criteria" (see Section 62-302.500, F.A.C. and individual criteria) (35) (a) Halomethanes (Total trihalomethanes) (total of bromoform, chlorodibromomethane, dichlorobromomethane, and chloroform). Individual halomethanes shall not exceed (b)1. to (b)5. below. 

Micrograms/L < 80

(35) (b) 1. Halomethanes (individual): Bromoform 

Micrograms/L 

< 4.3 annual avg. 

< 360 annual avg. 

< 360 annual avg. 

< 360 annual avg. 
Parameter Units Class I Class II Class III: 

 Fresh 

Class III: 

Marine 

Class IV 

Notes: (1) "ln H" means the natural logarithm of total hardness expressed as milligrams/L of CaCO

3. For metals criteria involving 

hardness, the hardness shall be set at 25 mg/L if actual hardness is < 25 mg/L and set at 400 mg/L if actual hardness is > 400 mgprotective of human health not of aquatic life. (3) For application of dissolved metals criteria see 62-302.500(2)(d), F.A.C. 

(35) (b) 2. Halomethanes 

(individual): Chlorodibromomethane 

Micrograms/L 

< 0.41 annual avg.

< 34 annual avg. 

< 34 annual avg. 

< 34 annual avg. 

(35) (b) 3. Halomethanes (individual): Chloroform 

Micrograms/L 

< 5.67 annual avg.

< 470.8 annual 

avg. 

< 470.8 annual 

avg. 

< 470.8 annual 

avg. 

(35) (b) 4. Halomethanes (individual): Chloromethane (methyl chloride) 

Micrograms/L 

< 5.67 annual avg.

< 470.8 annual avg.

< 470.8 annual avg. 

< 470.8 annual avg.

(35) (b) 5. Halomethanes (individual): Dichlorobromomethane 

Micrograms/L 

< 0.27 annual avg.

< 22 annual avg. 

< 22 annual avg. 

< 22 annual avg. 

(36) Hexachlorobutadiene 

Micrograms/L 

< 0.45 annual avg.

< 49.7 annual avg.

< 49.7 annual avg. 

< 49.7 annual avg.

(37) Imbalance (see Nutrients) (38) Iron Milligrams/L < 1.0 

< 0.3 

< 1.0 

< 0.3 

< 1.0 

(39) Lead Micrograms/L 

See Notes (1) and (3). 

Pb 

<

 e(1.273[lnH]- 

 4.705); 

≤ 8.5 Pb 

<

 e(1.273 [lnH] - 

 4.705); 

≤ 8.5 

< 50 
Parameter Units Class I Class II Class III: 

 Fresh 

Class III: 

Marine 

Class IV 

Notes: (1) "ln H" means the natural logarithm of total hardness expressed as milligrams/L of CaCO

3. For metals criteria involving 

hardness, the hardness shall be set at 25 mg/L if actual hardness is < 25 mg/L and set at 400 mg/L if actual hardness is > 400 mgprotective of human health not of aquatic life. (3) For application of dissolved metals criteria see 62-302.500(2)(d), F.A.C. 

(40) Manganese Milligrams/L 

< 0.1 

(41) Mercury Micrograms/L 0.012 0.025 0.012 0.025 

< 0.2 

(42) Minimum Criteria (see Section 62-302. 500, F.A.C.) (43) Mixing Zones (See Section 62-4.244 , F.A.C.) (44) Nickel Micrograms/L 

See Notes (1) and (3). 

Ni 

≤ e(0.846[lnH]+0.0584)

< 8.3 Ni 

≤ e(0.846[lnH]+0.0584) 

< 8.3 

< 100 

(45) Nitrate Milligrams/L as N 

< 10 or that concentration that 

exceeds the nutrient criteria 

(46) Nuisance Species 

Substances in concentrations which result in the dominance of nuisance species: none sha

(47) (a) Nutrients The discharge of nutrients shall continue to be limited as needed to prevent violations of other sta

in this chapter. Man-induced nutrient enrichment (total nitrogen or total phosphorus) shall be condegradation in relation to the provisions of Sections 62-302.300, 62-302.700, and 62-4.242, F.A.C

(47) (b) Nutrients In no case shall nutrient concentrations of a body of water be altered so as to 

cause an imbalance in natural populations of aquatic flora or fauna. 
Parameter Units Class I Class II Class III: 

 Fresh 

Class III: 

Marine 

Class IV 

Notes: (1) "ln H" means the natural logarithm of total hardness expressed as milligrams/L of CaCO

3. For metals criteria involving 

hardness, the hardness shall be set at 25 mg/L if actual hardness is < 25 mg/L and set at 400 mg/L if actual hardness is > 400 mgprotective of human health not of aquatic life. (3) For application of dissolved metals criteria see 62-302.500(2)(d), F.A.C. 

(48) Odor (also see Color, Minimum 

Criteria, Phenolic Compounds, etc.) 

Threshold odor number 

Shall not exceed 24 at 60 degrees C as a daily average. 

 

(49) (a) Oils and Greases 

Milligrams/L Dissolved or

emulsified oils and 

greases shall not exceed 5.0 

Dissolved or emulsified oils and 

greases shall not exceed 5.0 

Dissolved or emulsified oils and 

greases shall not exceed 5.0 

Dissolved or emulsified oils and 

greases shall not exceed 5.0 

Dissolved or emulsified oils an

greases shall not exceed 5.0 

(49) (b) Oils and Greases 

No undissolved oil, or visible oil defined as iridescence, shall be present so as to cause taste or od

wise interfere with the beneficial use of waters. 

(50) Pesticides and Herbicides (50) (a) 2,4,5-TP Micrograms/L 

< 10

(50) (b) 2-4-D Micrograms/L 

< 100

(50) (c) Aldrin Micrograms/L 

< .00013 annual 

avg.; 

3.0 max 

< .00014 annual 

avg.; 

1.3 max 

< .00014 annual 

avg.; 

3.0 max 

< .00014 annual 

avg.; 

1.3 max 

(50) (d) Betahexachlorocyclohexane (b-BHC) Micrograms/L 

< 0.014 annual 

avg. 

< 0.046 annual avg.

< 0.046 annual avg. 

< 0.046 annual avg.
Parameter Units Class I Class II Class III: 

 Fresh 

Class III: 

Marine 

Class IV 

Notes: (1) "ln H" means the natural logarithm of total hardness expressed as milligrams/L of CaCO

3. For metals criteria involving 

hardness, the hardness shall be set at 25 mg/L if actual hardness is < 25 mg/L and set at 400 mg/L if actual hardness is > 400 mgprotective of human health not of aquatic life. (3) For application of dissolved metals criteria see 62-302.500(2)(d), F.A.C. 

(50) (e) Chlordane Micrograms/L 

< 0.00058 annual 

avg.; 

0.0043 max 

< 0.00059 annual 

avg.; 

0.004 max 

< 0.00059 annual 

avg.; 

0.0043 max 

< 0.00059 annual 

avg.; 

 0.004 max 

(50) (f) DDT Micrograms/L 

< 0.00059 annual 

avg.; 

0.001 max 

< 0.00059 annual 

avg.; 

 0.001 max 

< 0.00059 annual 

avg.; 

 0.001 max 

< 0.00059 annual 

avg.; 

 0.001 max 

(50) (g) Demeton Micrograms/L 

< 0.1 

< 0.1 

< 0.1 

< 0.1 

(50) (h) Dieldrin Micrograms/L 

< 0.00014 annual 

avg.; 

 0.0019 max 

< 0.00014 annual 

avg.; 

 0.0019 max 

< 0.00014 annual 

avg.; 

 0.0019 max 

< 0.00014 annual 

avg.; 

 0.0019 max 

(50) (i) Endosulfan, Micrograms/L 

< 0.056 

< 0.0087 

< 0.056 

< 0.0087 

(50) (j) Endrin Micrograms/L 

< 0.0023 

< 0.0023 

< 0.0023 

< 0.0023 

(50) (k) Guthion Micrograms/L 

< 0.01 

< 0.01 

< 0.01 

< 0.01 

(50) (l) Heptachlor Micrograms/L 

< 0.00021 annual 

avg.; 0.0038 max 

< 0.00021 annual 

avg.; 0.0036 max 

< 0.00021 annual 

avg.; 0.0038 max 

< 0.00021 annual 

avg.; 0.0036 max 

(50) (m) Lindane (g-benzene hexachloride) 

Micrograms/L 

< 0.019 annual 

avg.; 

 0.08 max 

< 0.063 annual 

avg.; 

 0.16 max 

< 0.063 annual 

avg.; 

 0.08 max 

< 0.063. annual 

avg.; 

 0.16 max 

(50) (n) Malathion Micrograms/L 

< 0.1 

< 0.1 

< 0.1 

< 0.1 

(50) (o) Methoxychlor 

Micrograms/L 

< 0.03 

< 0.03 

< 0.03 

< 0.03 

(50) (p) Mirex Micrograms/L 

< 0.001 

< 0.001 

< 0.001 

< 0.001 

(50) (q) Parathion Micrograms/L 

< 0.04 

< 0.04 

< 0.04 

< 0.04 

(50) (r) Toxaphene Micrograms/L 

< 0.0002 

< 0.0002 

< 0.0002 

< 0.0002 
Parameter Units Class I Class II Class III: 

 Fresh 

Class III: 

Marine 

Class IV 

Notes: (1) "ln H" means the natural logarithm of total hardness expressed as milligrams/L of CaCO

3. For metals criteria involving 

hardness, the hardness shall be set at 25 mg/L if actual hardness is < 25 mg/L and set at 400 mg/L if actual hardness is > 400 mgprotective of human health not of aquatic life. (3) For application of dissolved metals criteria see 62-302.500(2)(d), F.A.C. 

(51) (a) pH (Class I and Class IV 

Waters) 

Standard Units Shall not vary more than one unit above or below natural background provided that the pH is not low

units or raised above 8.5 units. If natural background is less than 6 units, the pH shall not vary below vary more than one unit above natural background. If natural background is higher than 8.5 units, the 

above natural background or vary more than one unit below background. 

(51) (b) pH (Class II Waters) 

Standard Units Shall not vary more than one unit above or below natural background of coastal waters as defined in 

302.520(3)(b), F.A.C., or more than two-tenths unit above or below natural background of open wate

Section 62-302.520(3)(f), F.A.C., provided that the pH is not lowered to less than 6.5 units or raised anatural background is less than 6.5 units, the pH shall not vary below natural background or vary mo

natural background for coastal waters or more than two-tenths unit above natural background for ope

background is higher than 8.5 units, the pH shall not vary above natural background or vary more thanatural background of coastal waters or more than two-tenths unit below natural background of open 

(51) (c) pH (Class III Waters) 

Standard Units Shall not vary more than one unit above or below natural background of predominantly fresh waters 

defined in Section 62-302.520(3)(b), F.A.C. or more than two-tenths unit above or below natural bacwaters as defined in Section 62-302.520(3)(f), F.A.C., provided that the pH is not lowered to less tha

predominantly fresh waters, or less than 6.5 units in predominantly marine waters, or raised above 8.5 background is less than 6 units, in predominantly fresh waters or 6.5 units in predominantly marine wvary below natural background or vary more than one unit above natural background of predominantcoastal waters, or more than two-tenths unit above natural background of open waters. If natural back

8.5 units, the pH shall not vary above natural background or vary more than one unit below natural bpredominantly fresh waters and coastal waters, or more than two-tenths unit below natural backgroun

(51) (d) pH (Class V Waters) 

Standard Units Not lower than 5.0 nor greater than 9.5 except certain swamp waters which may be as low as 4.5. 

(52) (a) Phenolic Compounds: Total 

Phenolic compounds other than those produced by the natural decay of plant material, listed or unlist

flesh of edible fish or shellfish or produce objectionable taste or odor in a drinking water supply. 
Parameter Units Class I Class II Class III: 

 Fresh 

Class III: 

Marine 

Class IV 

Notes: (1) "ln H" means the natural logarithm of total hardness expressed as milligrams/L of CaCO

3. For metals criteria involving 

hardness, the hardness shall be set at 25 mg/L if actual hardness is < 25 mg/L and set at 400 mg/L if actual hardness is > 400 mgprotective of human health not of aquatic life. (3) For application of dissolved metals criteria see 62-302.500(2)(d), F.A.C. 

(52) (b) Total Chlorinated 

Phenols and Chlorinated Cresols 

Micrograms/L 1. The total of all chlorinated phenols, and chlorinated cresols, except as set forth in (c) 1. to (c) 4. 

below, shall not exceed 1.0 unless higher values are shown not to be chronically toxic. Such higher 

values shall be approved in writing by the Secretary. 

2. The compounds listed in (c) 1. to (c) 6. below shall not exceed the limits specified for each 

compound. 

(52) (c) 1. Phenolic Compound: 2-chlorophenol 

Micrograms/L

< 120 < 400 

See Note (2). 

 < 400 

See Note (2). 

 < 400 

See Note (2). 

 < 400 

See Note (2). 

(52)(c) 2. Phenolic Compound: 2,4-dichlorophenol 

Micrograms/L < 93

See Note (2). 

< 790 

See Note (2). 

< 790 

See Note (2). 

< 790 

See Note (2). 

< 790 

See Note (2). 

(52) (c) 3. Phenolic Compound: Pentachlorophenol 

Micrograms/L 

< 30 max; 

< 0.28 annual avg;

< e(1.005[pH]-

5.29)

< 7.9 

< 30 max; 

< 8.2 annual avg; 

< e(1.005[pH]-

5.29)

< 7.9 

< 30 

(52)(c) 4. Phenolic Compound: 2,4,6-trichlorophenol 

Micrograms/L 

< 2.1 annual avg. 

< 6.5 annual avg. 

< 6.5 annual avg. 

< 6.5 annual avg. 

< 6.5 annual avg

(52) (c) 5. Phenolic Compound: 2,4-dinitrophenol 

Milligrams/L 

< 0.0697 

See Note (2). 

< 14.26 

See Note (2). 

< 14.26 

See Note (2). 

< 14.26 

See Note (2). 

< 14.26 

See Note (2). 
Parameter Units Class I Class II Class III: 

 Fresh 

Class III: 

Marine 

Class IV 

Notes: (1) "ln H" means the natural logarithm of total hardness expressed as milligrams/L of CaCO

3. For metals criteria involving 

hardness, the hardness shall be set at 25 mg/L if actual hardness is < 25 mg/L and set at 400 mg/L if actual hardness is > 400 mgprotective of human health not of aquatic life. (3) For application of dissolved metals criteria see 62-302.500(2)(d), F.A.C. 

(52) (c) 6. Phenolic Compound: Phenol 

Milligrams/L 

< 0.3 

< 0.3 

< 0.3 

< 0.3 

< 0.3 

(53) Phosphorus (Elemental) 

Micrograms/L

< 0.1 

< 0.1 

(54) Phthalate Esters 

Micrograms/L 

< 3.0 

< 3.0 

(55) Polychlorinated Biphenyls (PCBs) 

Micrograms/L 

< 0.000044 annual 

avg.; 0.014 max 

< 0.000045 annual 

avg.; 0.03 max 

< 0.000045 annual 

avg.; 0.014 max 

< 0.000045 annual 

avg.; 0.03 max 

(56) (a) Polycyclic Aromatic Hydrocarbons (PAHs). Total of: Acenaphthylene; Benzo(a)anthracene; Benzo(a)pyrene; Benzo(b)fluoranthene; Benzo-(ghi)perylene; Benzo(k)fluoranthene; Chrysene; Dibenzo-(a,h)anthracene; Indeno(1,2,3-cd)pyrene; and Phenanthrene 

Micrograms/L 

< 0.0028 annual 

avg. 

< 0.031 annual avg.

< 0.031annual avg. 

< 0.031 annual avg.
Parameter Units Class I Class II Class III: 

 Fresh 

Class III: 

Marine 

Class IV 

Notes: (1) "ln H" means the natural logarithm of total hardness expressed as milligrams/L of CaCO

3. For metals criteria involving 

hardness, the hardness shall be set at 25 mg/L if actual hardness is < 25 mg/L and set at 400 mg/L if actual hardness is > 400 mgprotective of human health not of aquatic life. (3) For application of dissolved metals criteria see 62-302.500(2)(d), F.A.C. 

(56) (b) 1 (Individual PAHs): 

Acenaphthene 

Milligrams/L < 1.2

See Note (2). 

< 2.7 

See Note (2). 

< 2.7 

See Note (2). 

< 2.7 

See Note (2). 

(56)(b) 2. (Individual PAHs): Anthracene 

Milligrams/L < 9.6

See Note (2). 

< 110 

See Note (2). 

< 110 

See Note (2). 

< 110 

See Note (2). 

(56) (b) 3. (Individual PAHs): Fluoranthene 

Milligrams/L < 0.3

See Note (2). 

< 0.370 

See Note (2). 

< 0.370 

See Note (2). 

< 0.370 

See Note (2). 

(56) (b) 4. (Individual PAHs): Fluorene 

Milligrams/L < 1.3

See Note (2). 

< 14 

See Note (2). 

< 14 

See Note (2). 

< 14 

See Note (2). 

(56) (b) 5. (Individual PAHs): Pyrene 

Milligrams/L < 0.96

See Note (2). 

< 11 

See Note (2). 

< 11 

See Note (2). 

< 11 

See Note (2). 

(57)(a) Radioactive substances (Combined radium 226 and 228) 

Picocuries/L 

< 5 

< 5 

< 5 

< 5 

< 5 

(57) (b) Radioactive substances (Gross alpha particle activity including radium 226, but excluding radon and uranium) 

Picocuries/L 

< 15 

< 15 

< 15 

< 15 

< 15 

(58) Selenium Micrograms/L 

< 5.0 

< 71 

< 5.0 

< 71 
Parameter Units Class I Class II Class III: 

 Fresh 

Class III: 

Marine 

Class IV 

Notes: (1) "ln H" means the natural logarithm of total hardness expressed as milligrams/L of CaCO

3. For metals criteria involving 

hardness, the hardness shall be set at 25 mg/L if actual hardness is < 25 mg/L and set at 400 mg/L if actual hardness is > 400 mgprotective of human health not of aquatic life. (3) For application of dissolved metals criteria see 62-302.500(2)(d), F.A.C. 

(59) Silver Micrograms/L 

See Note (3). 

< 0.07 See Minimum 

criteria in Section 

62-302.500(1)(c) 

< 0.07 See Minimum 

criteria in Section 

62-302.500(1)(c) 

(60) Specific Conductance (see Conductance, Specific, above) (61) Substances in concentrations which injure, are chronically toxic to, or produce adverse physiological or behavioral response 

in humans, plants, or animals 

None shall be present. 

(62) 1,1,2,2-Tetrachloroethane Micrograms/L 

< 0.17 annual avg.

< 10.8 annual avg.

< 10.8 annual avg. 

< 10.8 annual avg.

(63) Tetrachloroethylene (1,1,2,2-tetrachloroethene) 

Micrograms/L 

< 0.8 annual avg., 

< 3.0 max 

< 8.85 annual avg.

< 8.85 annual avg. 

< 8.85 annual avg.

(64) Thallium Micrograms/L < 1.7 < 6.3 < 6.3 < 6.3 (65) Thermal Criteria (See Section 62-302.520) 
Parameter Units Class I Class II Class III: 

 Fresh 

Class III: 

Marine 

Class IV 

Notes: (1) "ln H" means the natural logarithm of total hardness expressed as milligrams/L of CaCO

3. For metals criteria involving 

hardness, the hardness shall be set at 25 mg/L if actual hardness is < 25 mg/L and set at 400 mg/L if actual hardness is > 400 mgprotective of human health not of aquatic life. (3) For application of dissolved metals criteria see 62-302.500(2)(d), F.A.C. 

(66) Total Dissolved Gases 

Percent of the saturation value for 

gases at the existing atmospheric and hydrostatic pressures 

< 110% of 

saturation value 

< 110% of 

saturation value 

< 110% of 

saturation value 

< 110% of 

saturation value 

(67) (Transparency Depth of the compensation point for 

photosynthetic activity 

Shall not be reduced by more 

than 10% as compared to the natural background value. 

Shall not be reduced by more 

than 10% as compared to the natural background value. 

Shall not be reduced by more 

than 10% as compared to the natural background value. 

Shall not be reduced by more 

than 10% as compared to the natural background value. 

(68) Trichloroethylene (trichloroethene) 

Micrograms/L 

< 2.7 annual avg., 

< 3.0 max 

< 80.7 annual avg.

< 80.7 annual avg. 

< 80.7 annual avg.

(69) Turbidity Nephelometric 

Turbidity Units 

(NTU) 

< 29 above natural 

background 

conditions 

< 29 above natural 

background 

conditions 

< 29 above natural 

background 

conditions 

< 29 above natural 

background 

conditions 

< 29 above natur

background 

conditions 

(70) Zinc Micrograms/L 

See Notes (1) and (3). 

Zn 

≤ e(0.8473[lnH]+0.884)

< 86 Zn 

≤ e(0.8473[lnH]+0.884) 

< 86 

< 1,000 
Specific Authority 403.061, 403.062, 403.087, 403.504, 403.704, 403.804 FS. Law Implemented 403.021, 403.061, 403.087, 403.088, 

403.141, 403.161, 403.182, 403.502, 403.702, 403.708 FS. History – New 1-28-90, Formerly 17-3.065, Amended 2-13-92, 6-17-92, 

Formerly 17-302.540, 17-302.550, 17-302.560, 17-302.570, 17-302.580, Amended 4-25-93, Formerly 17-302.530, Amended 1-23-95, 1-

15-96, 5-15-02, 7-19-04, - -06.