What Barium is, and why it's regulated
What the EPA limit means
2000 µg/L
Maximum Contaminant Level — the enforceable ceiling a supplier must stay under.
2000 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 Barium 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 |
|---|---|---|---|
| Andover Village Public Water | Andover | NY | 26791.8 µg/L 1340% of the EPA limit, at the 95th percentile of samples — 2000 µg/L |
| West Dundee | West Dundee | IL | 15550 µg/L 778% of the EPA limit, at the 95th percentile of samples — 2000 µg/L |
| Camelot S/D | Garner | NC | 10695 µg/L 535% of the EPA limit, at the 95th percentile of samples — 2000 µg/L |
| Choconut Creek Apartments | — | NY | 8687 µg/L 434% of the EPA limit, at the 95th percentile of samples — 2000 µg/L |
| Moorefield S/D | Knightdale | NC | 6988 µg/L 349% of the EPA limit, at the 95th percentile of samples — 2000 µg/L |
| Indian Lake Wd | Indian Lake | NY | 6745.52 µg/L 337% of the EPA limit, at the 95th percentile of samples — 2000 µg/L |
| Country Meadows Mhp | Schuyler | NY | 6125 µg/L 306% of the EPA limit, at the 95th percentile of samples — 2000 µg/L |
| Redwood Glen Camp & Conference Ctr | Loma Mar | CA | 5330 µg/L 267% of the EPA limit, at the 95th percentile of samples — 2000 µg/L |
| Watchtower Farms I | Shawangunk | NY | 5138.85 µg/L 257% of the EPA limit, at the 95th percentile of samples — 2000 µg/L |
| Napa River Ranch | Napa | CA | 4715 µg/L 236% of the EPA limit, at the 95th percentile of samples — 2000 µg/L |
| Westover Hills Mhp | Ashland | NY | 4628 µg/L 231% of the EPA limit, at the 95th percentile of samples — 2000 µg/L |
| Jones Dairy Farm S/D | Wake Forest | NC | 4604 µg/L 230% of the EPA limit, at the 95th percentile of samples — 2000 µg/L |
| German Valley | German Valley | IL | 3700 µg/L 185% of the EPA limit, at the 95th percentile of samples — 2000 µg/L |
| Sterling Lake | Warwick | NY | 3620.56 µg/L 181% of the EPA limit, at the 95th percentile of samples — 2000 µg/L |
| Stonehenge S/D | Raleigh | NC | 3439.45 µg/L 172% of the EPA limit, at the 95th percentile of samples — 2000 µg/L |
| New London Water & Fp Authority | Cropwell | AL | 3148.48 µg/L 157% of the EPA limit, at the 95th percentile of samples — 2000 µg/L |
| Deerhurst Mhc | Wendell | FL | 3119.9 µg/L 156% of the EPA limit, at the 95th percentile of samples — 2000 µg/L |
| Silver Lake Water Works | Silver Lake | IN | 3028 µg/L 151% of the EPA limit, at the 95th percentile of samples — 2000 µg/L |
| Norma Gardens Apartments | Colesville | NY | 2976.5 µg/L 149% of the EPA limit, at the 95th percentile of samples — 2000 µg/L |
| Greasewood Springs Community Boarding School Bia | Lower Greasewood | AZ | 2910 µg/L 146% of the EPA limit, at the 95th percentile of samples — 2000 µg/L |
| Maple Park | Maple Park | IL | 2910 µg/L 146% of the EPA limit, at the 95th percentile of samples — 2000 µg/L |
| Windstone Crossing | Troutman | NC | 2889.25 µg/L 144% of the EPA limit, at the 95th percentile of samples — 2000 µg/L |
| Meadow Brook M H P | — | MD | 2835 µg/L 142% of the EPA limit, at the 95th percentile of samples — 2000 µg/L |
| Summerville Boro Mun Auth | Summerville | PA | 2780 µg/L 139% of the EPA limit, at the 95th percentile of samples — 2000 µg/L |
| Monterey Rural Water System Inc | Monterey | LA | 2700 µg/L 135% of the EPA limit, at the 95th percentile of samples — 2000 µg/L |
Frequently asked questions about Barium
What is Barium in drinking water?
Barium enters water from natural mineral deposits and drilling waste; high levels can raise blood pressure.
What is the EPA limit for Barium?
The EPA's Maximum Contaminant Level for Barium is 2000 µg/L, and its health goal (MCLG) is 2000 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 Barium in US tap water?
Of the 33,736 water suppliers with results on file, 26,603 detected Barium — 78.9% of those tested.