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§ 141.64 Maximum contaminant levels for disinfection byproducts.
(a) Bromate and chlorite. The maximum contaminant levels (MCLs) for bromate and chlorite are as follows:
| Disinfection byproduct | MCL (mg/L) |
|---|---|
| Bromate | 0.010 |
| Chlorite | 1.0 |
(1) Compliance dates for CWSs and NTNCWSs. Subpart H systems serving 10,000 or more persons must comply with this paragraph (a) beginning January 1, 2002. Subpart H systems serving fewer than 10,000 persons and systems using only ground water not under the direct influence of surface water must comply with this paragraph (a) beginning January 1, 2004.
(2) The Administrator, pursuant to section 1412 of the Act, hereby identifies the following as the best technology, treatment techniques, or other means available for achieving compliance with the maximum contaminant levels for bromate and chlorite identified in this paragraph (a):
| Disinfection byproduct | Best available technology |
|---|---|
| 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 |