What Atrazine is, and why it's regulated
What the EPA limit means
3 µg/L
Maximum Contaminant Level — the enforceable ceiling a supplier must stay under.
3 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 Atrazine 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.
| Supplier | City | State | Level vs EPA limit |
|---|---|---|---|
| Stucker Fork Water Utility | Austin | IN | 165.15 µg/L 5505% of the EPA limit, at the 95th percentile of samples — 3 µg/L |
| Erie, City of | Erie | KS | 9.54 µg/L 318% of the EPA limit, at the 95th percentile of samples — 3 µg/L |
| Protection, City of | Protection | KS | 8.8 µg/L 293% of the EPA limit, at the 95th percentile of samples — 3 µg/L |
| West Warren-Viola U.D. | Morrison | TN | 8.2975 µg/L 277% of the EPA limit, at the 95th percentile of samples — 3 µg/L |
| Public Wholesale Wsd 13 | Lacygne | KS | 7.76 µg/L 259% of the EPA limit, at the 95th percentile of samples — 3 µg/L |
| Russell, City of | Russell | KS | 7.75 µg/L 258% of the EPA limit, at the 95th percentile of samples — 3 µg/L |
| Oswego, City of | Oswego | KS | 7.525 µg/L 251% of the EPA limit, at the 95th percentile of samples — 3 µg/L |
| Howard, City of | Howard | KS | 7.25 µg/L 242% of the EPA limit, at the 95th percentile of samples — 3 µg/L |
| Garnett, City of | Garnett | KS | 6.83 µg/L 228% of the EPA limit, at the 95th percentile of samples — 3 µg/L |
| Decherd Water Dept | Decherd | TN | 6.7365 µg/L 225% of the EPA limit, at the 95th percentile of samples — 3 µg/L |
| Springfield Water System | Springfield | TN | 6.645 µg/L 222% of the EPA limit, at the 95th percentile of samples — 3 µg/L |
| Osawatomie, City of | Osawatomie | KS | 6.25 µg/L 208% of the EPA limit, at the 95th percentile of samples — 3 µg/L |
| Great Plains Development Authority | Parsons | KS | 6.14 µg/L 205% of the EPA limit, at the 95th percentile of samples — 3 µg/L |
| Blanchester Village Pws | — | OH | 6.14 µg/L 205% of the EPA limit, at the 95th percentile of samples — 3 µg/L |
| Carbondale, City of | Carbondale | KS | 5.95 µg/L 198% of the EPA limit, at the 95th percentile of samples — 3 µg/L |
| Boonville Pws | Boonville | MO | 5.6285 µg/L 188% of the EPA limit, at the 95th percentile of samples — 3 µg/L |
| Atchison, City of | Atchison | KS | 5.62 µg/L 187% of the EPA limit, at the 95th percentile of samples — 3 µg/L |
| Kaskaskia Water District | New Athens | IL | 5.545 µg/L 185% of the EPA limit, at the 95th percentile of samples — 3 µg/L |
| Napoleon City | Napoleon | OH | 5.293 µg/L 176% of the EPA limit, at the 95th percentile of samples — 3 µg/L |
| Beloit, City of | Beloit | KS | 5.025 µg/L 168% of the EPA limit, at the 95th percentile of samples — 3 µg/L |
| Public Wholesale Wsd 19 | Columbus | KS | 4.936 µg/L 165% of the EPA limit, at the 95th percentile of samples — 3 µg/L |
| Public Wholesale Wsd 23 | Fredonia | KS | 4.78 µg/L 159% of the EPA limit, at the 95th percentile of samples — 3 µg/L |
| Chanute, City of | Chanute | KS | 4.675 µg/L 156% of the EPA limit, at the 95th percentile of samples — 3 µg/L |
| Concordia Pws | Concordia | MO | 4.6635 µg/L 155% of the EPA limit, at the 95th percentile of samples — 3 µg/L |
| Colby, City of | Colby | KS | 4.5 µg/L 150% of the EPA limit, at the 95th percentile of samples — 3 µg/L |
Frequently asked questions about Atrazine
What is Atrazine in drinking water?
Atrazine is a widely used weed killer that runs off cropland; it can affect the cardiovascular and reproductive systems.
What is the EPA limit for Atrazine?
The EPA's Maximum Contaminant Level for Atrazine is 3 µg/L, and its health goal (MCLG) is 3 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 Atrazine in US tap water?
Of the 29,425 water suppliers with results on file, 1,368 detected Atrazine — 4.6% of those tested.