What the EPA limit means
No federal limit
The EPA has not set an enforceable numeric limit for this contaminant.
—
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 Chloroform 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 |
|---|---|---|---|
| Middlebury Water Department | Middlebury | IN | 3150.28 µg/L No EPA limit set |
| Brighton Twp Muni Auth | Beaver | PA | 2890.28 µg/L No EPA limit set |
| Monument Town of | Monument | CO | 2000.42 µg/L No EPA limit set |
| Campbellsburg Water Works | Campbellsburg | IN | 1200 µg/L No EPA limit set |
| Jarbidge Water System | Jarbidge | NV | 906.5 µg/L No EPA limit set |
| Country View Estates Gbwc | Pahrump | NV | 893.044 µg/L No EPA limit set |
| Jefferson Twp Water and Sewer | Somerset | PA | 681.125 µg/L No EPA limit set |
| Hudson Gaars Mill Water System | Dodson | LA | 421.75 µg/L No EPA limit set |
| City of Nome | — | TX | 407.9 µg/L No EPA limit set |
| Boswell Public Works Authority | Boswell | OK | 377.85 µg/L No EPA limit set |
| Beechwood Wsc | Hemphill | TX | 367 µg/L No EPA limit set |
| Choctaw Co. Rwsg & Swmd #6 | Boswell | OK | 361 µg/L No EPA limit set |
| Buckland Water System | Buckland | AK | 359.15 µg/L No EPA limit set |
| Asher Util Dev Auth | Asher | OK | 358.8 µg/L No EPA limit set |
| Sandy Point 480 Water System | Campti | LA | 335.6 µg/L No EPA limit set |
| Stringtown Pwa | Stringtown | OK | 332.65 µg/L No EPA limit set |
| Libby Wsc | Martinsville | TX | 327.8 µg/L No EPA limit set |
| Weleetka Public Works Authority | Weleetka | OK | 326.45 µg/L No EPA limit set |
| Osage Co Rwd #20 (Hulah) | Bartlesville | OK | 325.95 µg/L No EPA limit set |
| Golovin Community Water System | Golovin | AK | 315.6 µg/L No EPA limit set |
| Village of Sikes Water System | Sikes | LA | 312.6 µg/L No EPA limit set |
| The Trails S/D | Chapel Hill | NC | 288.7 µg/L No EPA limit set |
| Pittsburg | Pittsburg | OK | 275.4 µg/L No EPA limit set |
| Severy, City of | Severy | KS | 264 µg/L No EPA limit set |
| Hardy County Psd Baker | Moorefield | WV | 262.5 µg/L No EPA limit set |
Frequently asked questions about Chloroform
What is Chloroform in drinking water?
Chloroform 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.
Does the EPA limit Chloroform?
The EPA has not set a numeric Maximum Contaminant Level for Chloroform. It is still measured and reported, so levels can be compared between suppliers.
How common is Chloroform in US tap water?
Of the 33,841 water suppliers with results on file, 24,215 detected Chloroform — 71.6% of those tested.