Nitrite
Metropolitan District Commission
Nitrite, closely related to the fertilizer chemical nitrate, comes from urban runoff and from fertilizer applied to agricultural lands to pollute drinking water. Nitrite is significantly more toxic than nitrate. Excessive nitrite in water can cause oxygen deprivation in infants and increase the risk of cancer.
35
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | ND | 7 | 0 | ND |
| 2019 | ND | 7 | 0 | ND |
| 2020 | ND | 7 | 0 | ND |
| 2021 | ND | 3 | 0 | ND |
| 2022 | 0.0190 ppm | 3 | 3 | 0.0160 ppm - 0.0250 ppm |
| 2023 | ND | 8 | 0 | ND |
ppm = parts per million
State, National, and Health Guidelines for Drinking Water
EPA Maximum Contaminant
Level (MCL): 1 ppm
The legal limit for nitrite, established in 1991, was based on the rate of conversion of ingested nitrate into nitrite in adults. This limit may not fully protect against the risk of cancer due to nitrite exposure.
ppm = parts per million
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-07-18 | AE01630GE | ND |
| 2018-07-18 | AE01631GE | ND |
| 2018-07-18 | AE01636GE | ND |
| 2018-07-18 | AE01637GE | ND |
| 2018-07-18 | AE01641GE | ND |
| 2018-07-18 | AE01640GE | ND |
| 2018-07-18 | AE01632GE | ND |
| 2019-12-03 | CE70740 | ND |
| 2019-12-03 | CE70739 | ND |
| 2019-12-03 | CE70741 | ND |
| 2019-12-03 | CE70733 | ND |
| 2019-12-03 | CE70734 | ND |
| 2019-12-03 | CE70736 | ND |
| 2019-12-03 | CE70735 | ND |
| 2020-06-16 | AE60685GE | ND |
| 2020-06-16 | AE60686GE | ND |
| 2020-06-16 | AE60690GE | ND |
| 2020-06-16 | AE60689GE | ND |
| 2020-06-16 | AE60679GE | ND |
| 2020-06-16 | AE60680GE | ND |
| 2020-06-16 | AE60681GE | ND |
| 2021-11-23 | N300107450 300107453 | ND |
| 2021-11-23 | N300107451 300107459 | ND |
| 2021-11-29 | N300109635 300109639 | ND |
| 2022-12-15 | N300287100 300287103 | 0.0160 ppm |
| 2022-12-15 | N300287072 300287075 | 0.0250 ppm |
| 2022-12-15 | N300287053 300287056 | 0.0160 ppm |
| 2023-12-06 | N300456222 300456224 | ND |
| 2023-12-06 | N300456228 300456230 | ND |
| 2023-12-06 | N300456234 300456236 | ND |
| 2023-12-12 | N300459242 300459243 | ND |
| 2023-12-12 | N300459261 300459262 | ND |
| 2023-12-12 | N300459237 300459239 | ND |
| 2023-12-12 | N300459258 300459260 | ND |
| 2023-12-12 | N300459231 300459233 | ND |