Wis. Admin. Code Department of Natural Resources NR 809.20

Current through October 28, 2024

Section NR 809.20 - Synthetic organic contaminant maximum contaminant levels and BATS

(1) APPLICABILITY. The following maximum contaminant levels for synthetic organic contaminants apply to community water systems and non-transient non-community water systems.

Contaminant	MCL (mg/L)
Alachlor	0.002
Atrazine	0.003
Benzo[a]pyrene	0.0002
Carbofuran	0.04
Chlordane	0.002
2,4-D	0.07
Dalapon	0.2
Dibromochloropropane	0.0002
Di(2-ethylhexyl)adipate	0.4
Di(2-ethylhexyl)phthalate	0.006
Dinoseb	0.007
Diquat	0.02
Endothall	0.1
Endrin	0.002
Ethylene Dibromide	0.00005
Glyphosate	0.7
Heptachlor	0.0004
Heptachlor epoxide	0.0002
Hexachlorobenzene	0.001
Hexachlorocyclopentadiene	0.05
Lindane	0.0002
Methoxychlor	0.04
Oxamyl	0.2
Pentachlorophenol	0.001
Picloram	0.5
Polychlorinated biphenyls	0.0005
(PCBs)
Simazine	0.004
2,3,7,8-TCDD (Dioxin)	3x10-8
Toxaphene	0.003
2,4,5-TP	0.05

(2) BEST AVAILABLE TREATMENT. The following are the BATs available for achieving compliance with the maximum contaminant levels for the organic contaminants listed in sub. (1):

(a) Central treatment using granular activated carbon, except for glyphosate.

(b) Packed tower aeration for dibromochloropropane, di(2-ethylhexyl)adipate, ethylene dibromide, and hexachlorocyclopentadiene.

(c) Oxidation for glyphosate.

(d) Granular activated carbon, powdered activated carbon, ion exchange resins, nanofiltration, and reverse osmosis for PFOS and PFOA.

(3) ALTERNATIVE TREATMENT. A water supplier may use an alternative treatment not listed in sub. (2) if it is demonstrated to the department, using pilot studies or other means, that the alternative treatment is sufficient to achieve compliance with the MCLs in sub. (1).

Wis. Admin. Code Department of Natural Resources NR 809.20

CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10.

Amended by, CR 21-088: am. (1) Table, cr. (2) (d) Register July 2022 No. 799, eff. 8/1/2022.