Nitrite
City of Clyde
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.
24
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 | 0.101 ppm | 4 | 2 | ND - 0.205 ppm |
| 2019 | ND | 4 | 0 | ND |
| 2020 | 0.121 ppm | 4 | 1 | ND - 0.483 ppm |
| 2021 | 0.0938 ppm | 4 | 1 | ND - 0.375 ppm |
| 2022 | 0.0310 ppm | 4 | 2 | ND - 0.0659 ppm |
| 2023 | 0.131 ppm | 4 | 2 | ND - 0.343 ppm |
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 |
|---|---|---|
| 2018-03-08 | Q1809705004 | ND |
| 2018-06-07 | Q1822886004 | ND |
| 2018-09-19 | Q1837353007 | 0.205 ppm |
| 2018-12-12 | Q1851281003 | 0.200 ppm |
| 2019-03-20 | Q1911589008 | ND |
| 2019-05-22 | Q1927837002 | ND |
| 2019-07-23 | Q1946794001 | ND |
| 2019-11-18 | Q1977127002 | ND |
| 2020-03-05 | Q2008307007 | ND |
| 2020-06-02 | Q2021702002 | ND |
| 2020-07-28 | Q2029420002 | ND |
| 2020-12-01 | Q2047536002 | 0.483 ppm |
| 2021-01-28 | Q2102265004 | ND |
| 2021-05-27 | Q2113747007 | ND |
| 2021-08-04 | Q2120412002 | 0.375 ppm |
| 2021-11-30 | Q2132987003 | ND |
| 2022-01-12 | Q2201150007 | ND |
| 2022-01-12 | Q2201150008 | 0.0659 ppm |
| 2022-04-06 | Q2210712004 | ND |
| 2022-10-06 | Q2230213001 | 0.0580 ppm |
| 2023-02-23 | Q2307661001 | 0.343 ppm |
| 2023-05-25 | Q2319640001 | ND |
| 2023-08-24 | Q2336182001 | 0.181 ppm |
| 2023-11-29 | Q2350795003 | ND |