§ 64530. Applicability of this Chapter.

(a) Community water systems and nontransient noncommunity water systems that treat their water with a chemical disinfectant in any part of the treatment process or which provide water that contains a chemical disinfectant shall comply with the requirements of this chapter beginning on the dates specified in paragraphs (1) or (2), except as provided for in subsections (c) and (d).

(1) Systems using approved surface water and serving 10,000 or more persons shall comply beginning January 1, 2002.

(2) Systems using approved surface water and serving fewer than 10,000 persons and systems using only ground water not under the direct influence of surface water shall comply beginning January 1, 2004.

(b) Transient noncommunity water systems using chlorine dioxide shall comply with the requirements for chlorine dioxide in this chapter beginning on the dates specified in paragraphs (1) or (2).

(1) Systems using approved surface water and serving 10,000 or more persons shall comply beginning January 1, 2002.

(2) Systems using approved surface water and serving fewer than 10,000 persons and systems using only ground water not under the direct influence of surface water shall comply beginning January 1, 2004.

(c) Community water systems, and nontransient noncommunity water systems serving at least 10,000 persons, using a primary or residual disinfectant other than ultraviolet light or delivering water that has been treated with a primary or residual disinfectant other than ultraviolet light shall comply with the Individual Distribution System Evaluation (IDSE) requirements of 40 Code of Federal Regulations, parts 141.600 and either 141.601 and 141.605, 141.602 and 141.605, 141.603, or 141.604 (71 Fed. Reg. 388 (January 4, 2006); as amended at 74 Fed. Reg. 30953 (June 29, 2009)), which are incorporated by reference.

(d) Community water systems and nontransient noncommunity water systems using a primary or residual disinfectant other than ultraviolet light or delivering water that has been treated with a primary or residual disinfectant other than ultraviolet light shall:

(1) Comply with the applicable TTHM and HAA5 compliance date in table 64530-A;

Table 64530-A

TTHM and HAA5 Compliance Dates

		Shall comply with TTHM
		and HAA5 monitoring
		pursuant to section
Systems of this type . . .		64534.2(d) by . . .
(a) Systems that are not	(1) ≥100,000	April 1, 2012
part of a combined
distribution system	(2) 50,000 -	October 1, 2012
and systems that	99,999
serve the largest
population in the	(3) 10,000 -	October 1, 2013
combined distribution	49,999
system and serving a
population of . . .	(4) <10,000	October 1, 2013, if no
		Cryptosporidium monitoring is
		required pursuant to 40 Code of
		Federal Regulations part
		141.701(a)(4) (71 Fed. Reg. 654
		(January 5, 2006)), which is
		incorporated by reference; or
		October 1, 2014, if
		Cryptosporidium monotoring is
		required pursuant to 40 Code of
		Federal Regulations part
		141.701(a)(4) or (a)(6) (71 Fed.
		Reg. 654 (January 5, 2006)), which
		are incorporated by reference.
(b) Other consecutive or		At the same time as the system with
wholesale systems that		the earliest compliance date in the
are part of a combined		combined distribution system.
distribution system

(2) Systems required to conduct quarterly monitoring for TTHM and HAA5 pursuant to section 64534.2(d) shall:

(A) Begin monitoring in the first full calendar quarter that includes the compliance date in table 64530-A; and

(B) Make compliance calculations at the end of the fourth calendar quarter that follows the compliance date in table 64530-A and at the end of each subsequent quarter (or earlier if the LRAA calculated based on fewer than four quarters of data would cause the MCL to be exceeded regardless of the monitoring results of subsequent quarters).

(3) Systems required to conduct monitoring at a frequency that is less than quarterly shall:

(A) No later than 12 months after the compliance date in table 64530-A, begin monitoring in the calendar month recommended in the IDSE report prepared pursuant to section 64530(c) or the calendar month identified in the monitoring plan developed pursuant to section 64534.8; and

(B) Make compliance calculations beginning with the first compliance sample taken after the compliance date in table 64530-A.

HISTORY

1. New chapter 15.5 (articles 1-6, sections 64530-64537.6), article 1 (sections 64530-64531) and section filed 5-18-2006; operative 6-17-2006 (Register 2006, No. 20).

2. Amendment of subsection (a), new subsections (c)-(d)(3)(B) and amendment of Note filed 5-22-2012; operative 6-21-2012 (Register 2012, No. 21).

3. Amendment of subsection (c) and Table 64530-A filed 5-28-2014; operative 7-1-2014 (Register 2014, No. 22).

Note

Note: Authority cited: Sections 116350, 116375, 131052 and 131200, Health and Safety Code. Reference: Section 116350, Health and Safety Code.