Collapse to view only § 141.55 - Maximum contaminant level goals for radionuclides.
- § 141.50 - Maximum contaminant level goals for organic contaminants.
- § 141.51 - Maximum contaminant level goals for inorganic contaminants.
- § 141.52 - Maximum contaminant level goals for microbiological contaminants.
- § 141.53 - Maximum contaminant level goals for disinfection byproducts.
- § 141.54 - Maximum residual disinfectant level goals for disinfectants.
- § 141.55 - Maximum contaminant level goals for radionuclides.
§ 141.50 - Maximum contaminant level goals for organic contaminants.
(a) MCLGs are zero for the following contaminants:
(1) Benzene
(2) Vinyl chloride
(3) Carbon tetrachloride
(4) 1,2-dichloroethane
(5) Trichloroethylene
(6) Acrylamide
(7) Alachlor
(8) Chlordane
(9) Dibromochloropropane
(10) 1,2-Dichloropropane
(11) Epichlorohydrin
(12) Ethylene dibromide
(13) Heptachlor
(14) Heptachlor epoxide
(15) Pentachlorophenol
(16) Polychlorinated biphenyls (PCBs)
(17) Tetrachloroethylene
(18) Toxaphene
(19) Benzo[a]pyrene
(20) Dichloromethane (methylene chloride)
(21) Di(2-ethylhexyl)phthalate
(22) Hexachlorobenzene
(23) 2,3,7,8-TCDD (Dioxin)
(b) MCLGs for the following contaminants are as indicated:
Contaminant | MCLG in mg/l | (1) 1,1-Dichloroethylene | 0.007 | (2) 1,1,1-Trichloroethane | 0.20 | (3) para-Dichlorobenzene | 0.075 | (4) Aldicarb | 0.001 | (5) Aldicarb sulfoxide | 0.001 | (6) Aldicarb sulfone | 0.001 | (7) Atrazine | 0.003 | (8) Carbofuran | 0.04 | (9) o-Dichlorobenzene | 0.6 | (10) cis-1,2-Dichloroethylene | 0.07 | (11) trans-1,2-Dichloroethylene | 0.1 | (12) 2,4-D | 0.07 | (13) Ethylbenzene | 0.7 | (14) Lindane | 0.0002 | (15) Methoxychlor | 0.04 | (16) Monochlorobenzene | 0.1 | (17) Styrene | 0.1 | (18) Toluene | 1 | (19) 2,4,5-TP | 0.05 | (20) Xylenes (total) | 10 | (21) Dalapon | 0.2 | (22) Di(2-ethylhexyl)adipate | .4 | (23) Dinoseb | .007 | (24) Diquat | .02 | (25) Endothall | .1 | (26) Endrin | .002 | (27) Glyphosate | .7 | (28) Hexachlorocyclopentadiene | .05 | (29) Oxamyl (Vydate) | .2 | (30) Picloram | .5 | (31) Simazine | .004 | (32) 1,2,4-Trichlorobenzene | .07 | (33) 1,1,2-Trichloroethane | .003 |
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§ 141.51 - Maximum contaminant level goals for inorganic contaminants.
(a) [Reserved]
(b) MCLGs for the following contaminants are as indicated:
Contaminant | MCLG (mg/l) | Antimony | 0.006 | Arsenic | zero 1 | Asbestos | 7 Million fibers/liter (longer than 10 µm). | Barium | 2 | Beryllium | .004 | Cadmium | 0.005 | Chromium | 0.1 | Copper | 1.3 | Cyanide (as free Cyanide) | .2 | Fluoride | 4.0 | Lead | zero | Mercury | 0.002 | Nitrate | 10 (as Nitrogen). | Nitrite | 1 (as Nitrogen). | Total Nitrate + Nitrite | 10 (as Nitrogen). | Selenium | 0.05 | Thallium | .0005 |
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1 This value for arsenic is effective January 23, 2006. Until then, there is no MCLG.
§ 141.52 - Maximum contaminant level goals for microbiological contaminants.
(a) MCLGs for the following contaminants are as indicated:
Contaminant | MCLG | (1) | zero | (2) Viruses | zero | (3) | zero | (4) Total coliforms (including fecal) | zero | coliforms and | (5) | zero | (6) | zero |
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(b) The MCLG identified in paragraph (a)(4) of this section is applicable until March 31, 2016. The MCLG identified in paragraph (a)(6) of this section is applicable beginning April 1, 2016.
§ 141.53 - Maximum contaminant level goals for disinfection byproducts.
MCLGs for the following disinfection byproducts are as indicated:
Disinfection byproduct | MCLG
(mg/L) | Bromodichloromethane | zero | Bromoform | zero | Bromate | zero | Chlorite | 0.8 | Chloroform | 0.07 | Dibromochloromethane | 0.06 | Dichloroacetic acid | zero | Monochloroacetic acid | 0.07 | Trichloroacetic acid | 0.02 |
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§ 141.54 - Maximum residual disinfectant level goals for disinfectants.
MRDLGs for disinfectants are as follows:
Disinfectant residual | MRDLG(mg/L) | Chlorine | 4 (as Cl | Chloramines | 4 (as Cl | Chlorine dioxide | 0.8 (as ClO |
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§ 141.55 - Maximum contaminant level goals for radionuclides.
MCLGs for radionuclides are as indicated in the following table:
Contaminant | MCLG | 1. Combined radium-226 and radium-228 | Zero. | 2. Gross alpha particle activity (excluding radon and uranium) | Zero. | 3. Beta particle and photon radioactivity | Zero. | 4. Uranium | Zero. |
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