What Lead is, and why it's regulated
What the EPA limit means
0.0150 mg/L
Maximum Contaminant Level — the enforceable ceiling a supplier must stay under.
0.0 mg/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.
LCR
Where these measurements come from. Hover the tag for the EPA programme and years.
Where Lead was found
The water suppliers reporting the highest levels, worst first.
| Supplier | City | State | Level vs EPA limit |
|---|---|---|---|
| Smethport Borough | Smethport | PA | 0.9044 mg/L 6029% above the EPA limit of 0.0150 mg/L |
| Aqua Pa Mt Jewett | Sharon | PA | 0.8036 mg/L 5357% above the EPA limit of 0.0150 mg/L |
| Country Meadows | Farmington Hills | MI | 0.8004 mg/L 5336% above the EPA limit of 0.0150 mg/L |
| The Valley Mhc | Warren | PA | 0.8002 mg/L 5335% above the EPA limit of 0.0150 mg/L |
| North Coventry Water System | Pottstown | PA | 0.8000 mg/L 5333% above the EPA limit of 0.0150 mg/L |
| Ridge Haven Conference Center | Rosman | NC | 0.7484 mg/L 4989% above the EPA limit of 0.0150 mg/L |
| Zerbe Sisters | Narvon | PA | 0.7236 mg/L 4824% above the EPA limit of 0.0150 mg/L |
| Lukins Brothers Water Company | South Lake Tahoe | CA | 0.6730 mg/L 4487% above the EPA limit of 0.0150 mg/L |
| Sullivan Trail Village | Easton | PA | 0.6695 mg/L 4463% above the EPA limit of 0.0150 mg/L |
| Usmc Nebo (Barstow) | Barstow | CA | 0.6500 mg/L 4333% above the EPA limit of 0.0150 mg/L |
| Elderberry Mhp | Conneaut Lake | PA | 0.6400 mg/L 4267% above the EPA limit of 0.0150 mg/L |
| Warwick Water Works | King of Prussia | PA | 0.6280 mg/L 4187% above the EPA limit of 0.0150 mg/L |
| Eei Meadows Complex | Dallas | PA | 0.6085 mg/L 4057% above the EPA limit of 0.0150 mg/L |
| Roaring Gap Club Inc | Roaring Gap | NC | 0.5890 mg/L 3927% above the EPA limit of 0.0150 mg/L |
| Sapphire Vill.Condos (West) | St. John | VI | 0.5885 mg/L 3923% above the EPA limit of 0.0150 mg/L |
| June Lake Pud - Down Canyon | June Lake | CA | 0.5728 mg/L 3819% above the EPA limit of 0.0150 mg/L |
| Owls Nest Golf Club and Condos | Thornton | NH | 0.5660 mg/L 3773% above the EPA limit of 0.0150 mg/L |
| Burlando Heights Mutual Water Co. | Kernville | CA | 0.5360 mg/L 3573% above the EPA limit of 0.0150 mg/L |
| Riverview Manor Condos | Raymond | NH | 0.5100 mg/L 3400% above the EPA limit of 0.0150 mg/L |
| St John'S Water (sc1020002) | Johns Island (Sta.) | SC | 0.5080 mg/L 3387% above the EPA limit of 0.0150 mg/L |
| Glen Meadows Condominiums | Gaylord | MI | 0.5000 mg/L 3333% above the EPA limit of 0.0150 mg/L |
| Questa Verde F | St. Croix | VI | 0.4980 mg/L 3320% above the EPA limit of 0.0150 mg/L |
| Nps - Death Valley, Stovepipe Wells | Death Valley | CA | 0.4830 mg/L 3220% above the EPA limit of 0.0150 mg/L |
| Blue Lake Residences | Troy | MI | 0.4802 mg/L 3201% above the EPA limit of 0.0150 mg/L |
| Lake Francis Mutual Water Company | Dobbins | CA | 0.4628 mg/L 3085% above the EPA limit of 0.0150 mg/L |
Frequently asked questions about Lead
What is Lead in drinking water?
Lead usually enters water from old service lines and household plumbing, not the source. The 90th-percentile result is what the EPA action level applies to; lead harms children's brain development.
What is the EPA limit for Lead?
The EPA's Maximum Contaminant Level for Lead is 0.0150 mg/L, and its health goal (MCLG) is 0.0 mg/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 Lead in US tap water?
Lead is measured at every supplier the rule covers, so a result on file is not the same as a problem. Of the 47,629 suppliers with results, 4,246 (8.9%) are above the EPA action level.