What Chlorite is, and why it's regulated
What the EPA limit means
1000 µg/L
Maximum Contaminant Level — the enforceable ceiling a supplier must stay under.
800 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 Chlorite was found
The water suppliers reporting the highest levels, worst first.
| Supplier | City | State | Level vs EPA limit |
|---|---|---|---|
| Veolia Water New Jersey Lambertville | Lambertville city-1017 | NJ | 5350 µg/L 535% of the EPA limit, in the worst sample — 1000 µg/L |
| Sharyland Wsc | — | TX | 3950 µg/L 395% of the EPA limit, in the worst sample — 1000 µg/L |
| Oswego, City of | Oswego | KS | 3300 µg/L 330% of the EPA limit, in the worst sample — 1000 µg/L |
| Maverick County Airport Water Works | Eagle Pass | TX | 3200 µg/L 320% of the EPA limit, in the worst sample — 1000 µg/L |
| Eastland County Water Supply District | Ranger | TX | 2770 µg/L 277% of the EPA limit, in the worst sample — 1000 µg/L |
| Public Wholesale Wsd 19 | Columbus | KS | 2700 µg/L 270% of the EPA limit, in the worst sample — 1000 µg/L |
| Southern Okla Water Corp | Ardmore | OK | 1900 µg/L 190% of the EPA limit, in the worst sample — 1000 µg/L |
| Lamoni Municipal Utilities | Lamoni | IA | 1870 µg/L 187% of the EPA limit, in the worst sample — 1000 µg/L |
| Greenwood Waterworks | Greenwood | AR | 1650 µg/L 165% of the EPA limit, in the worst sample — 1000 µg/L |
| Stilwell | Stilwell | OK | 1610 µg/L 161% of the EPA limit, in the worst sample — 1000 µg/L |
| City of Midlothian | Midlothian | TX | 1610 µg/L 161% of the EPA limit, in the worst sample — 1000 µg/L |
| Epcor - Willow Valley/Lake Cimarron | Mohave Valley | AZ | 1600 µg/L 160% of the EPA limit, in the worst sample — 1000 µg/L |
| City of Santa Rosa | Santa Rosa | TX | 1550 µg/L 155% of the EPA limit, in the worst sample — 1000 µg/L |
| Rend Lake Inter-City Water System | Benton | IL | 1540 µg/L 154% of the EPA limit, in the worst sample — 1000 µg/L |
| Mesa City of | Mesa | AZ | 1513 µg/L 151% of the EPA limit, in the worst sample — 1000 µg/L |
| Frederick | Frederick | OK | 1510 µg/L 151% of the EPA limit, in the worst sample — 1000 µg/L |
| Nodaway Co East Pwsd 1 | Stanberry | MO | 1510 µg/L 151% of the EPA limit, in the worst sample — 1000 µg/L |
| City of Brenham | Brenham | TX | 1500 µg/L 150% of the EPA limit, in the worst sample — 1000 µg/L |
| Creek Co Rwd # 7 | Mounds | OK | 1430 µg/L 143% of the EPA limit, in the worst sample — 1000 µg/L |
| Stroud Utilities Authority | Stroud | OK | 1410 µg/L 141% of the EPA limit, in the worst sample — 1000 µg/L |
| Fort Bend County Wcid 2 | Stafford | TX | 1400 µg/L 140% of the EPA limit, in the worst sample — 1000 µg/L |
| Perry Water & Light Dept | Perry | OK | 1390 µg/L 139% of the EPA limit, in the worst sample — 1000 µg/L |
| City of Weslaco | Weslaco | TX | 1340 µg/L 134% of the EPA limit, in the worst sample — 1000 µg/L |
| Rifle City of | Rifle | CO | 1330 µg/L 133% of the EPA limit, in the worst sample — 1000 µg/L |
| Walnut Creek Sud | Springtown | TX | 1320 µg/L 132% of the EPA limit, in the worst sample — 1000 µg/L |
Frequently asked questions about Chlorite
What is Chlorite in drinking water?
Chlorite is a by-product of chlorine dioxide disinfection; high levels can cause anaemia and affect infants' nervous systems.
What is the EPA limit for Chlorite?
The EPA's Maximum Contaminant Level for Chlorite is 1000 µg/L, and its health goal (MCLG) is 800 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 Chlorite in US tap water?
Of the 456 water suppliers with results on file, 356 detected Chlorite — 78.1% of those tested.