What Dichloromethane is, and why it's regulated
What the EPA limit means
5 µg/L
Maximum Contaminant Level — the enforceable ceiling a supplier must stay under.
0.0 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 Dichloromethane 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 |
|---|---|---|---|
| Preston County Psd 1 | Reedsville | WV | 67 µg/L 1340% of the EPA limit, at the 95th percentile of samples — 5 µg/L |
| Backwoods-Saddlebrook Comm Ws | Moyock | NC | 35.275 µg/L 706% of the EPA limit, at the 95th percentile of samples — 5 µg/L |
| Saxapahaw Utility Company | Saxapahaw | NC | 34.4 µg/L 688% of the EPA limit, at the 95th percentile of samples — 5 µg/L |
| Usmc - Housing Coleville | Bridgeport | CA | 16 µg/L 320% of the EPA limit, at the 95th percentile of samples — 5 µg/L |
| Stuart, City of - Water Plant | Stuart | FL | 14.9 µg/L 298% of the EPA limit, at the 95th percentile of samples — 5 µg/L |
| Saxman | Saxman | AK | 13 µg/L 260% of the EPA limit, at the 95th percentile of samples — 5 µg/L |
| Cattaraugus Village | Cattaraugus | NY | 12.9 µg/L 258% of the EPA limit, at the 95th percentile of samples — 5 µg/L |
| Sierra Village Mutual Water Co | Twain Harte | CA | 12.174 µg/L 243% of the EPA limit, at the 95th percentile of samples — 5 µg/L |
| Sjolander Road Mobile Home Park | — | TX | 11 µg/L 220% of the EPA limit, at the 95th percentile of samples — 5 µg/L |
| Cal Fire - Miramonte Conservation Camp | Miramonte | CA | 11 µg/L 220% of the EPA limit, at the 95th percentile of samples — 5 µg/L |
| San Gabriel Valley Wc - Fontana | Fontana | CA | 10.92 µg/L 218% of the EPA limit, at the 95th percentile of samples — 5 µg/L |
| Spring Run Estates Wtp | Coatesville | PA | 10.6 µg/L 212% of the EPA limit, at the 95th percentile of samples — 5 µg/L |
| Alpine Acres Mutual Water Co | Soulsbyville | CA | 10.5 µg/L 210% of the EPA limit, at the 95th percentile of samples — 5 µg/L |
| Ferron - Castle Valley Ssd | Castledale | UT | 10.25 µg/L 205% of the EPA limit, at the 95th percentile of samples — 5 µg/L |
| Stonetown Clearview Mhc | Noble | OK | 10.24 µg/L 205% of the EPA limit, at the 95th percentile of samples — 5 µg/L |
| Smwd - Sj Ground Water Plant | Rancho Santa Margarita | CA | 9.82 µg/L 196% of the EPA limit, at the 95th percentile of samples — 5 µg/L |
| Signal Mountain Ranch Property Owners Wc | Beulah | CO | 9.4735 µg/L 189% of the EPA limit, at the 95th percentile of samples — 5 µg/L |
| Howells, Village of | Howells | NE | 9.41 µg/L 188% of the EPA limit, at the 95th percentile of samples — 5 µg/L |
| Chester Town of | Chester | MT | 9.4 µg/L 188% of the EPA limit, at the 95th percentile of samples — 5 µg/L |
| Naval Support Activity-Nw | Chesapeake City | VA | 9.245 µg/L 185% of the EPA limit, at the 95th percentile of samples — 5 µg/L |
| City of Dilley | Dilley | TX | 8.8 µg/L 176% of the EPA limit, at the 95th percentile of samples — 5 µg/L |
| Mountain Gate Estates Mhp | Globe | CA | 8.8 µg/L 176% of the EPA limit, at the 95th percentile of samples — 5 µg/L |
| Sierra Twain Harte Mhp | Jamestown | CA | 8.39 µg/L 168% of the EPA limit, at the 95th percentile of samples — 5 µg/L |
| Pinecrest Permittees Assn | Pinecrest | CA | 8.3675 µg/L 167% of the EPA limit, at the 95th percentile of samples — 5 µg/L |
| Sky Lakes Wsc | Waller | TX | 8 µg/L 160% of the EPA limit, at the 95th percentile of samples — 5 µg/L |
Frequently asked questions about Dichloromethane
What is Dichloromethane in drinking water?
Dichloromethane is a paint-stripping and degreasing solvent; it is a probable carcinogen affecting the liver.
What is the EPA limit for Dichloromethane?
The EPA's Maximum Contaminant Level for Dichloromethane is 5 µg/L, and its health goal (MCLG) is 0.0 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 Dichloromethane in US tap water?
Of the 34,524 water suppliers with results on file, 602 detected Dichloromethane — 1.7% of those tested.