What Nitrite 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.
1000 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 Nitrite 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 |
|---|---|---|---|
| Ho-Chunk Che-Nunk | Black River Falls | WI | 8400 µg/L 840% of the EPA limit, at the 95th percentile of samples — 1000 µg/L |
| La Puente Valley Cwd | La Puente | CA | 7850 µg/L 785% of the EPA limit, at the 95th percentile of samples — 1000 µg/L |
| Ontario Municipal Utilities Company | Ontario | CA | 4525 µg/L 453% of the EPA limit, at the 95th percentile of samples — 1000 µg/L |
| Garden City | Garden City | SD | 3770 µg/L 377% of the EPA limit, at the 95th percentile of samples — 1000 µg/L |
| Martinsburg Water District | Martinsburg | NY | 3480 µg/L 348% of the EPA limit, at the 95th percentile of samples — 1000 µg/L |
| Payson Town of | Payson | AZ | 3210 µg/L 321% of the EPA limit, at the 95th percentile of samples — 1000 µg/L |
| Chrisman | Chrisman | IL | 3100 µg/L 310% of the EPA limit, at the 95th percentile of samples — 1000 µg/L |
| Parkview Acres | Zephyrhills | FL | 3100 µg/L 310% of the EPA limit, at the 95th percentile of samples — 1000 µg/L |
| Pine Manor Mobile Home Park | Spencer | NY | 3080 µg/L 308% of the EPA limit, at the 95th percentile of samples — 1000 µg/L |
| Wheatland City Water Supply | Wheatland | IA | 2824 µg/L 282% of the EPA limit, at the 95th percentile of samples — 1000 µg/L |
| Hillview Mobile Home Park | Spencer | NY | 2810 µg/L 281% of the EPA limit, at the 95th percentile of samples — 1000 µg/L |
| Goldston`S Mhp | Ramseur | NC | 2700 µg/L 270% of the EPA limit, at the 95th percentile of samples — 1000 µg/L |
| Chilchinbeto Community Day School Bia | Chilchinbeto | AZ | 2600 µg/L 260% of the EPA limit, at the 95th percentile of samples — 1000 µg/L |
| Ocwa Skyridge Community Wd | Syracuse | NY | 2600 µg/L 260% of the EPA limit, at the 95th percentile of samples — 1000 µg/L |
| Mcgraw Village | Mcgraw | NY | 2600 µg/L 260% of the EPA limit, at the 95th percentile of samples — 1000 µg/L |
| Country Corner Rv Park | — | PA | 2490 µg/L 249% of the EPA limit, at the 95th percentile of samples — 1000 µg/L |
| Wa of Great Neck North | Thomaston | NY | 2473 µg/L 247% of the EPA limit, at the 95th percentile of samples — 1000 µg/L |
| Homer Village-Newton Water Works | Homer | NY | 2460 µg/L 246% of the EPA limit, at the 95th percentile of samples — 1000 µg/L |
| Coal Valley | Coal Valley | IL | 2390 µg/L 239% of the EPA limit, at the 95th percentile of samples — 1000 µg/L |
| Manhasset Lakeville Wd | North Hempstead | NY | 2382 µg/L 238% of the EPA limit, at the 95th percentile of samples — 1000 µg/L |
| Cs Tierra Mesa Estates Water Company | Yuma | MO | 2340 µg/L 234% of the EPA limit, at the 95th percentile of samples — 1000 µg/L |
| Sheldahl Water Supply | Sheldahl | IA | 2087.22 µg/L 209% of the EPA limit, at the 95th percentile of samples — 1000 µg/L |
| Ryan Water Supply | Ryan | IA | 2004.5 µg/L 200% of the EPA limit, at the 95th percentile of samples — 1000 µg/L |
| Granger Muni Water Supply | Granger | IA | 1961 µg/L 196% of the EPA limit, at the 95th percentile of samples — 1000 µg/L |
| Bayles Lake Lot Owners Association | Loda | IL | 1930 µg/L 193% of the EPA limit, at the 95th percentile of samples — 1000 µg/L |
Frequently asked questions about Nitrite
What is Nitrite in drinking water?
Nitrite comes from the same farm and sewage sources as nitrate and poses the same risk to infants.
What is the EPA limit for Nitrite?
The EPA's Maximum Contaminant Level for Nitrite is 1000 µg/L, and its health goal (MCLG) is 1000 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 Nitrite in US tap water?
Of the 24,440 water suppliers with results on file, 2,483 detected Nitrite — 10.2% of those tested.