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.
UCMR-5
Where these measurements come from. Hover the tag for the EPA programme and years.
Where Lithium 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 |
|---|---|---|---|
| Waterpro Inc | Draper | UT | 960 µg/L No EPA limit set |
| Creekside Village Mhp | Esperance | NY | 921 µg/L No EPA limit set |
| Arizona Water Co - Apache Junction | Apache Junction | AZ | 796 µg/L No EPA limit set |
| Aqua Pa Water Co Honesdale | — | PA | 702 µg/L No EPA limit set |
| Bermuda Water Company Inc | Bullhead City | AZ | 580 µg/L No EPA limit set |
| Bernalillo Water System | Bernalillo | NM | 537 µg/L No EPA limit set |
| Mesa City of | Mesa | AZ | 525 µg/L No EPA limit set |
| Indianola Water Supply | Indianola | IA | 480 µg/L No EPA limit set |
| Cal Am - Oakhurst | — | CA | 474 µg/L No EPA limit set |
| City of Buckeye - Valencia Town Division | — | — | 468 µg/L No EPA limit set |
| Rio Rancho Water & Ww Services | Rio Rancho | NM | 467 µg/L No EPA limit set |
| Vermillion | Vermillion | SD | 440 µg/L No EPA limit set |
| Wapello Rural Water Assoc. | Ottumwa | IA | 420 µg/L No EPA limit set |
| City of Woodway | Woodway | TX | 403 µg/L No EPA limit set |
| Coralville Muni Water System | Coralville | IA | 390 µg/L No EPA limit set |
| Pima Utilities | Chandler | AZ | 381 µg/L No EPA limit set |
| West Des Moines Water Works | West Des Moines | IA | 380 µg/L No EPA limit set |
| Mount Pleasant Municipal Utilities | Mount Pleasant | IA | 370 µg/L No EPA limit set |
| Arizona Water Co - Pinal Valley | Casa Grande | AZ | 353 µg/L No EPA limit set |
| Laguna Valley | Laguna | NM | 343 µg/L No EPA limit set |
| Anthony W&Sd | Anthony | NM | 335 µg/L No EPA limit set |
| Goodyear Water Department | Goodyear | AZ | 335 µg/L No EPA limit set |
| Lower Rio Grande Pwwa South Valley | Vado | NM | 335 µg/L No EPA limit set |
| Woodridge Village | Woodridge | NY | 335 µg/L No EPA limit set |
| Tri County Sud | Marlin | TX | 325 µg/L No EPA limit set |
Frequently asked questions about Lithium
What is Lithium in drinking water?
Lithium 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 Lithium?
The EPA has not set a numeric Maximum Contaminant Level for Lithium. It is still measured and reported, so levels can be compared between suppliers.
How common is Lithium in US tap water?
Of the 9,684 water suppliers with results on file, 3,552 detected Lithium — 36.7% of those tested.