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Contaminant guide

Simazine in drinking water

The EPA limit for Simazine in drinking water is 4 µg/L. Of the 28,894 water suppliers tested, 477 had it detected.

4 µg/L
EPA limit (MCL)
1.7%
of suppliers detected it
(477/28,894)

What the EPA limit means

⚖️

4 µg/L

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

🎯

4 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 Simazine 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
Greenfield Greenfield IL
4.06 µg/L 101%
of the EPA limit, at the 95th percentile of samples — 4 µg/L
Salem Salem IL
3.65 µg/L 91%
of the EPA limit 4 µg/L
Pecan Grove Mud — TX
3.6 µg/L 90%
of the EPA limit 4 µg/L
Evansville Evansville IL
3.22 µg/L 81%
of the EPA limit 4 µg/L
Neoga Neoga IL
3.2 µg/L 80%
of the EPA limit 4 µg/L
Coulterville Coulterville IL
2.8935 µg/L 72%
of the EPA limit 4 µg/L
Carlinville Carlinville IL
2.56 µg/L 64%
of the EPA limit 4 µg/L
Gateway Regional Water Company — IL
2.5 µg/L 63%
of the EPA limit 4 µg/L
Sparta Sparta IL
2.4 µg/L 60%
of the EPA limit 4 µg/L
Mount Olive — IL
2.375 µg/L 59%
of the EPA limit 4 µg/L
S L M Water Commission Mascoutah IL
2.25 µg/L 56%
of the EPA limit 4 µg/L
Jericho Wd Oyster Bay NY
2.174 µg/L 54%
of the EPA limit 4 µg/L
Waverly Waverly IL
1.946 µg/L 49%
of the EPA limit 4 µg/L
Hillsboro Hillsboro IL
1.82 µg/L 46%
of the EPA limit 4 µg/L
Smithfield, Town of Smithfield NC
1.758 µg/L 44%
of the EPA limit 4 µg/L
Tarboro, Town of Tarboro NC
1.706 µg/L 43%
of the EPA limit 4 µg/L
Henderson Water Utility/South Henderson KY
1.5 µg/L 38%
of the EPA limit 4 µg/L
Carlyle Carlyle IL
1.46 µg/L 37%
of the EPA limit 4 µg/L
Centralia Centralia IL
1.42 µg/L 36%
of the EPA limit 4 µg/L
Newark City Pws Newark OH
1.394 µg/L 35%
of the EPA limit 4 µg/L
Fairfield Fairfield IL
1.38 µg/L 35%
of the EPA limit 4 µg/L
City of Baltimore — MD
1.34 µg/L 34%
of the EPA limit 4 µg/L
Mattoon Mattoon IL
1.27 µg/L 32%
of the EPA limit 4 µg/L
Gillespie Gillespie IL
1.2555 µg/L 31%
of the EPA limit 4 µg/L
Springfield Springfield IL
1.239 µg/L 31%
of the EPA limit 4 µg/L

Frequently asked questions about Simazine

What is Simazine in drinking water?

Simazine 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 Simazine?

The EPA's Maximum Contaminant Level for Simazine is 4 µg/L, and its health goal (MCLG) is 4 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 Simazine in US tap water?

Of the 28,894 water suppliers with results on file, 477 detected Simazine — 1.7% of those tested.