California Code of Regulations
Title 22 - Social Security
Division 4 - Environmental Health
Chapter 15 - Domestic Water Quality and Monitoring Regulations
Article 12 - Best Available Technologies (BAT)
Section 64447.2 - Best Available Technologies (BATs) - Inorganic Chemicals
The technologies listed in Table 64447.2-A are the best available technology, treatment techniques, or other means available for achieving compliance with the MCLs in Table 64431-A for inorganic chemicals.
Table 64447.2-A
Best Available Technologies (BATs) Inorganic Chemicals
| Chemical | Best Available Technologies (BATs) | |
| Aluminum | 10 | |
| Antimony | 2, 7 | |
| Arsenic | 1, 2, 5, 6, 7, 9, 13 | |
| Asbestos | 2, 3, 8 | |
| Barium | 5, 6, 7, 9 | |
| Beryllium | 1, 2, 5, 6, 7 | |
| Cadmium | 2, 5, 6, 7 | |
| Chromium (hexavalent) | 5, 7, 14 | |
| Chromium (total) | 2, 5, 6a, 7 | |
| Cyanide | 5, 7, 11 | |
| Fluoride | 1 | |
| Mercury | 2b, 4, 6b, 7b | |
| Nickel | 5, 6, 7 | |
| Nitrate | 5, 7, 9 | |
| Nitrite | 5, 7 | |
| Perchlorate | 5, 12 | |
| Selenium | 1, 2c, 6, 7, 9 | |
| Thallium | 1, 5 | |
| __________ | ||
| a BAT for chromium III (trivalent chromium) only. | ||
| b BAT only if influent mercury concentrations <10 µg/L. | ||
| c BAT for selenium IV only. | ||
Key to BATs in Table 64447.2-A:
1 = Activated Alumina
2 = Coagulation/Filtration (not BAT for systems <500 service connections)
3 = Direct and Diatomite Filtration
4 = Granular Activated Carbon
5 = Ion Exchange
6 = Lime Softening (not BAT for systems <500 service connections)
7 = Reverse Osmosis
8 = Corrosion Control
9 = Electrodialysis
10 = Optimizing treatment and reducing aluminum added
11 = Chlorine oxidation
12 = Biological fluidized bed reactor
13 = Oxidation/Filtration
14= Reduction/Coagulation/Filtration
Note: Authority cited: Sections 116271, 116293(b), 116350 and 116375, Health and Safety Code. Reference: Section 116370, Health and Safety Code.
Note: Authority cited: Sections 116293(b), 116350, 116375, 131052 and 131200, Health and Safety Code. Reference: Section 116370, Health and Safety Code.
