California Code of Regulations › Title 22 - Social Security › Division 4 - Environmental Health › Chapter 15.5 - Disinfectant Residuals, Disinfection Byproducts, and Disinfection Byproduct Precursors › Article 2 - Maximum Contaminant Levels for Disinfection Byproducts and Maximum Residual Disinfectant Levels › Section 64533 - Maximum Contaminant Levels for Disinfection Byproducts

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a) Using the monitoring and calculation
				  methods specified in sections
				  64534,
				  64534.2,
				  64535, and
				  64535.2, the primary MCLs for the
				  disinfection byproducts shown in table 64533-A shall not be exceeded in
				  drinking water supplied to the public.
Table 64533-A Maximum Contaminant Levels and
					 Detection Limits for Purposes of Reporting Disinfection
					 Byproducts
Disinfection Byproduct
Maximum Contaminant Level (
							 mg/L)
Detection Limit for Purposes of
							 Reporting (mg/L)
Total trihalomethanes (TTHM)
0.080
Bromodichloromethane
0.0010
Bromoform
0.0010
Chloroform
0.0010
Dibromochloromethane
0.0010
Haloacetic acids (five) (HAA5)
0.060
Monochloroacetic Acid
0.0020
Dichloroacetic Acid
0.0010
Trichloroacetic Acid
0.0010
Monobromoacetic Acid
0.0010
Dibromoacetic Acid
0.0010
Bromate
0.010
0.0050
0.00101
Chlorite
1.0
0.020
1 For analysis performed using EPA Method 317.0 Revision
					 2.0, 321.8, or 326.0
(b) A
				  system installing GAC, membranes, or other technology to limit disinfectant
				  byproducts to comply with this section may apply to the State Board for an
				  extension up to December 31, 2003. Applications for extensions shall include
				  the results of disinfection byproduct monitoring, a description of the
				  technology being installed and how it is expected to affect future disinfection
				  byproduct levels, and a proposed schedule for compliance. If granted an
				  extension, a system shall meet the schedule and interim treatment and
				  monitoring requirements established by the State Board.
(c) The best technology, treatment
				  techniques, or other means available for achieving compliance with the maximum
				  contaminant levels for disinfection byproducts are identified in table 64533-B.
Table 64533-B Best Available Technology Disinfection
					 Byproducts
Disinfection
							 Byproduct
Best Available
							 Technology
TTHM and HAA5
Enhanced coagulation or enhanced softening or GAC10,
							 with chlorine as the primary and residual
							 disinfectant1
For all systems that disinfect
							 their source water:
(1) Enhanced coagulation or
							 enhanced softening, plus GAC10;
(2) Nanofiltration with a molecular
							 weight cutoff <=1000 Daltons; or
(3)
							 GAC202
For consecutive systems and applies
							 only to the disinfected water that consecutive systems buy or otherwise
							 receive:2
(1) Systems serving >=10,000
							 persons: improved distribution system and storage tank management to reduce
							 residence time, plus the use of chloramines for disinfectant residual
							 maintenance; and
(2) Systems serving <10,000
							 persons: improved distribution system and storage tank management to reduce
							 residence time
Bromate
Control of ozone treatment process to reduce production
							 of bromate
Chlorite
Control of treatment processes to reduce disinfectant
							 demand and control of disinfection treatment processes to reduce disinfectant
							 levels
1 When using the monitoring and calculation methods
					 specified in sections
					 64534,
					 64534.2(a),
					 64535, and
					 64535.2(a) and
					 (b).
2 When using the monitoring and calculation methods
					 specified in sections
					 64534,
					 64534.2(d),
					 64535, and
					 64535.2(a) and
					 (e).
1. New
					 article 2 (sections
					 64533-64533.5) and section filed
					 5-18-2006; operative 6-17-2006 (Register 2006, No. 20).
2. Amendment
					 of Tables 64533-A and 64533-B and NOTE filed 5-22-2012; operative 6-21-2012
					 (Register 2012, No. 21).
3. Change without regulatory effect
					 amending subsection (b) and NOTE filed 6-2-2015 pursuant to section
					 100, title 1, California Code of
					 Regulations (Register 2015, No. 23).
Note: Authority cited: Sections
						116271,
						116350
						and
						116375,
						Health and Safety Code. Reference: Sections
						116350,
						116365
						and
						116370,
						Health and Safety Code.