Current groundwater standards
Current public health and public welfare groundwater standards are contained in Ch. NR 140, Wis. Adm. Code.
Public health groundwater quality standards
| Substance | Enforcement Standard (ES) (micrograms per liter − except as noted) |
Preventive Action Limit (PAL) (micrograms per liter − except as noted) |
|---|---|---|
| Acetochlor | 7 | 0.7 |
| "Acetochlor ethane sulfonic acid + oxanilic acid (Acetochlor − ESA + OXA)" | 230 | 46 |
| Acetone | 9 mg/1 | 1.8 mg/l |
| Alachlor | 2 | 0.2 |
| Alachlor ethane sulfonic acid (Alachlor − ESA) | 20 | 4 |
| Aldicarb | 10 | 2 |
| Aluminum | 200 | 40 |
| Ammonia (as N) | 9.7 mg/1 | 0.97 mg/1 |
| Antimony | 6 | 1.2 |
| Anthracene | 3000 | 600 |
| Arsenic | 10 | 1 |
| Asbestos | 7 million fibers per liter (MFL) | 0.7 MFL |
| Atrazine, total chlorinated residues | 3² | 0.3² |
| Bacteria, Total Coliform | 0³ | 0³ |
| Barium | 2 milligrams/liter (mg/l) | 0.4 mg/l |
| Bentazon | 300 | 60 |
| Benzene | 5 | 0.5 |
| Benzo(b)fluoranthene | 0.2 | 0.02 |
| Benzo(a)pyrene | 0.2 | 0.02 |
| Beryllium | 4 | 0.4 |
| Boron | 1000 | 200 |
| Bromodichloromethane | 0.6 | 0.06 |
| Bromoform | 4.4 | 0.44 |
| Bromomethane | 10 | 1 |
| Butylate | 400 | 80 |
| Cadmium | 5 | 0.5 |
| Carbaryl | 40 | 4 |
| Carbofuran | 40 | 8 |
| Carbon disulfide | 1000 | 200 |
| Carbon tetrachloride | 5 | 0.5 |
| Chloramben | 150 | 30 |
| Chlordane | 2 | 0.2 |
| Chlorodifluoromethane | 7 mg/l | 0.7 mg/l |
| Chloroethane | 400 | 80 |
| Chloroform | 6 | 0.6 |
| Chlorpyrifos | 2 | 0.4 |
| Chloromethane | 30 | 3 |
| Chromium (total) | 100 | 10 |
| Chrysene | 0.2 | 0.02 |
| Cobalt | 40 | 8 |
| Copper | 1300 | 130 |
| Cyanazine | 1 | 0.1 |
| Cyanide, free⁴ | 200 | 40 |
| Dacthal | 70 | 14 |
| 1,2−Dibromoethane (EDB) | 0.05 | 0.005 |
| Dibromochloromethane | 60 | 6 |
| 1,2−Dibromo−3−chloropropane (DBCP) | 0.2 | 0.02 |
| Dibutyl phthalate | 1000 | 100 |
| Dicamba | 300 | 60 |
| 1,2−Dichlorobenzene | 600 | 60 |
| 1,3−Dichlorobenzene | 600 | 120 |
| 1,4−Dichlorobenzene | 75 | 15 |
| Dichlorodifluoromethane | 1000 | 200 |
| 1,1−Dichloroethane | 850 | 85 |
| 1,2−Dichloroethane | 5 | 0.5 |
| 1,1−Dichloroethylene | 7 | 0.7 |
| 1,2−Dichloroethylene (cis) | 70 | 7 |
| 1,2−Dichloroethylene (trans) | 100 | 20 |
| 2,4−Dichlorophenoxyacetic Acid (2,4−D) | 70 | 7 |
| 1,2−Dichloropropane | 5 | 0.5 |
| 1,3−Dichloropropene (cis/trans) | 0.4 | 0.04 |
| Di (2−ethylhexyl) phthalate | 6 | 0.6 |
| Dimethenamid/Dimethenamid−P | 50 | 5 |
| Dimethoate | 2 | 0.4 |
| 2,4−Dinitrotoluene | 0.05 | 0.005 |
| 2,6−Dinitrotoluene | 0.05 | 0.005 |
| Dinitrotoluene, Total Residues⁵ | 0.05 | 0.005 |
| Dinoseb | 7 | 1.4 |
| 1,4−Dioxane | 3 | 0.3 |
| Dioxin (2, 3, 7, 8−TCDD) | 0.00003 | 0.000003 |
| Endrin | 2 | 0.4 |
| EPTC | 250 | 50 |
| Ethylbenzene | 700 | 140 |
| Ethyl ether | 1000 | 100 |
| Ethylene glycol | 14 mg/l | 2.8 mg/l |
| Fluoranthene | 400 | 80 |
| Fluorene | 400 | 80 |
| Fluoride | 4 mg/l | 0.8 mg/l |
| Fluorotrichloromethane | 3490 | 698 |
| Formaldehyde | 1000 | 100 |
| Heptachlor | 0.4 | 0.04 |
| Heptachlor epoxide | 0.2 | 0.02 |
| Hexachlorobenzene | 1 | 0.1 |
| N−Hexane | 600 | 120 |
| Hydrogen sulfide | 30 | 6 |
| Lead | 15 | 1.5 |
| Lindane | 0.2 | 0.02 |
| Manganese | 300 | 60 |
| Mercury | 2 | 0.2 |
| Methanol | 5000 | 1000 |
| Methoxychlor | 40 | 4 |
| Methylene chloride | 5 | 0.5 |
| Methyl ethyl ketone (MEK) | 4 mg/l | 0.8 mg/l |
| Methyl isobutyl ketone (MIBK) | 500 | 50 |
| Methyl tert−butyl ether (MTBE) | 60 | 12 |
| Metolachlor/s−Metolachlor | 100 | 10 |
| Metolachlor ethane sulfonic acid + oxanilic acid (Metolachlor − ESA + OXA) | 1.3 mg/l | 0.26 mg/l |
| Metribuzin | 70 | 14 |
| Molybdenum | 40 | 8 |
| Monochlorobenzene | 100 | 20 |
| Naphthalene | 100 | 10 |
| Nickel | 100 | 20 |
| Nitrate (as N) | 10 mg/l | 2 mg/l |
| Nitrate + Nitrite (as N) | 10 mg/l | 2 mg/l |
| Nitrite (as N) | 1 mg/1 | 0.2 mg/l |
| N−Nitrosodiphenylamine | 7 | 0.7 |
| Pentachlorophenol (PCP) | 1 | 0.1 |
| Perchlorate | 1 | 0.l |
| Phenol | 2 mg/l | 0.4 mg/l |
| Picloram | 500 | 100 |
| Polychlorinated biphenyls (PCBs) | 0.03 | 0.003 |
| Prometon | 100 | 20 |
| Propazine | 10 | 2 |
| Pyrene | 250 | 50 |
| Pyridine | 10 | 2 |
| Selenium | 50 | 10 |
| Silver | 50 | 10 |
| Simazine | 4 | 0.4 |
| Styrene | 100 | 10 |
| Tertiary Butyl Alcohol (TBA) | 12 | 1.2 |
| 1,1,1,2−Tetrachloroethane | 70 | 7 |
| 1,1,2,2−Tetrachloroethane | 0.2 | 0.02 |
| Tetrachloroethylene | 5 | 0.5 |
| Tetrahydrofuran | 50 | 10 |
| Thallium | 2 | 0.4 |
| Toluene | 800 | 160 |
| Toxaphene | 3 | 0.3 |
| 1,2,4−Trichlorobenzene | 70 | 14 |
| 1,1,1−Trichloroethane | 200 | 40 |
| 1,1,2−Trichloroethane | 5 | 0.5 |
| Trichloroethylene (TCE) | 5 | 0.5 |
| 2,4,5−Trichlorophenoxy−propionic acid (2,4,5−TP) | 50 | 5 |
| 1,2,3−Trichloropropane | 60 | 12 |
| Trifluralin | 7.5 | 0.75 |
| Trimethylbenzenes (1,2,4− and 1,3,5− combined) | 480 | 96 |
| Vanadium | 30 | 6 |
| Vinyl chloride | 0.2 | 0.02 |
| Xylene ⁶ | 2 mg/l | 0.4 mg/l |
Public welfare groundwater quality standards
| Substance | Enforcement Standard (ES) (milligrams per liter − except as noted) |
Preventive Action Limit (PAL) (milligrams per liter − except as noted) |
|---|---|---|
| Chloride | 250 | 125 |
| Color | 15 color units | 7.5 color units |
| Foaming agents MBAS (Methylene−Blue Active Substances) | 0.5 | 0.25 |
| Iron | 0.3 | 0.15 |
| Manganese | 0.05 | 0.025 |
| Odor | 3 (Threshold Odor No.) | 1.5 (Threshold Odor No.) |
| Sulfate | 250 | 125 |
| Zinc | 5 | 2.5 |
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