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Contaminant guide

2,4-D in drinking water

The EPA limit for 2,4-D in drinking water is 70 µg/L. Of the 28,409 water suppliers tested, 309 had it detected.

70 µg/L
EPA limit (MCL)
1.1%
of suppliers detected it
(309/28,409)

What the EPA limit means

⚖️

70 µg/L

Maximum Contaminant Level — the enforceable ceiling a supplier must stay under.

🎯

70 µg/L

Health goal (MCLG) — the level with no known health effect. It is a goal, not a legal limit, and is often zero for carcinogens.

🧪

SYR4

Where these measurements come from. Hover the tag for the EPA programme and years.

Where 2,4-D was found

The water suppliers reporting the highest levels, worst first. For lead and copper that is the 90th-percentile result the action level is written against; for Six-Year Review data, the 95th percentile of each system's samples.

SupplierCityStateLevel vs EPA limit
New Britain Water Department West Hartford CT
100 µg/L 143%
of the EPA limit, at the 95th percentile of samples — 70 µg/L
Sidney City Pws Sidney OH
8.1 µg/L 12%
of the EPA limit 70 µg/L
Breezy Hill W/D (sc0220006) Graniteville SC
7.971 µg/L 11%
of the EPA limit 70 µg/L
Live Oak Wtp Live Oak FL
7.75 µg/L 11%
of the EPA limit 70 µg/L
Chenoa Chenoa IL
7.1 µg/L 10%
of the EPA limit 70 µg/L
Oxford Water Works & Sewer Board Oxford AL
6.1 µg/L 8.7%
of the EPA limit 70 µg/L
Laharpe La Harpe IL
5.6 µg/L 8%
of the EPA limit 70 µg/L
Bradford Acres Water Association Spanish Fork UT
4.76 µg/L 6.8%
of the EPA limit 70 µg/L
Coulterville Coulterville IL
3.745 µg/L 5.4%
of the EPA limit 70 µg/L
Elk Creek, Village of Elk Creek NE
3.057 µg/L 4.4%
of the EPA limit 70 µg/L
North Castle Water District #4 North Castle NY
3.02 µg/L 4.3%
of the EPA limit 70 µg/L
Nashville Nashville IL
2.9 µg/L 4.1%
of the EPA limit 70 µg/L
Martinsburg City of Martinsburg WV
2.8 µg/L 4%
of the EPA limit 70 µg/L
Gretna, Town of Gretna VA
2.74 µg/L 3.9%
of the EPA limit 70 µg/L
Port Washington Wd North Hempstead NY
2.6 µg/L 3.7%
of the EPA limit 70 µg/L
St Charles Co Pwsd #2 Wright City Wright City MO
2.48 µg/L 3.5%
of the EPA limit 70 µg/L
Holbrook City of Holbrook AZ
2.1 µg/L 3%
of the EPA limit 70 µg/L
Taylor Coastal Water ; Sewer District Perry FL
1.99 µg/L 2.8%
of the EPA limit 70 µg/L
Wvaw - Valley Water and Sewer-Deerwood — —
1.83 µg/L 2.6%
of the EPA limit 70 µg/L
Lafourche Water District 1 Lockport LA
1.826 µg/L 2.6%
of the EPA limit 70 µg/L
Aqua Pa Oakhill White Haven PA
1.8 µg/L 2.6%
of the EPA limit 70 µg/L
Fort Wayne - 3 Rivers Filtration Plant Fort Wayne IN
1.675 µg/L 2.4%
of the EPA limit 70 µg/L
Waverly Waverly IL
1.66 µg/L 2.4%
of the EPA limit 70 µg/L
Village of Calvin Water System Calvin LA
1.64 µg/L 2.3%
of the EPA limit 70 µg/L
Miramar (East ; West) Plants Miramar FL
1.52405 µg/L 2.2%
of the EPA limit 70 µg/L

Frequently asked questions about 2,4-D

What is 2,4-D in drinking water?

2,4-D is monitored in US public drinking water under EPA rules. Each supplier's result is reported to the EPA and published here with its source and period.

What is the EPA limit for 2,4-D?

The EPA's Maximum Contaminant Level for 2,4-D is 70 µg/L, and its health goal (MCLG) is 70 µg/L. A result above the limit means the supplier must act; the goal is the level at which no health effects are expected.

How common is 2,4-D in US tap water?

Of the 28,409 water suppliers with results on file, 309 detected 2,4-D — 1.1% of those tested.