Nitrite
North Hunt Special Utility District
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.
51
Samples
4
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 | 0.481 ppm | 8 | 8 | 0.264 ppm - 0.844 ppm |
| 2019 | 0.469 ppm | 8 | 8 | 0.170 ppm - 1.15 ppm |
| 2020 | 0.217 ppm | 9 | 6 | ND - 0.673 ppm |
| 2021 | 0.228 ppm | 8 | 7 | ND - 0.769 ppm |
| 2022 | 0.763 ppm | 10 | 8 | ND - 1.65 ppm |
| 2023 | 0.697 ppm | 8 | 8 | 0.221 ppm - 1.27 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 |
|---|---|---|
| 2018-02-14 | Q1806240002 | 0.315 ppm |
| 2018-02-14 | Q1806240001 | 0.412 ppm |
| 2018-05-10 | Q1819320002 | 0.264 ppm |
| 2018-05-10 | Q1819320001 | 0.765 ppm |
| 2018-08-09 | Q1831973003 | 0.290 ppm |
| 2018-08-09 | Q1831973004 | 0.299 ppm |
| 2018-11-06 | Q1844318001 | 0.658 ppm |
| 2018-11-06 | Q1844318002 | 0.844 ppm |
| 2019-03-12 | Q1910237003 | 0.171 ppm |
| 2019-03-12 | Q1910237004 | 0.779 ppm |
| 2019-05-28 | Q1928750001 | 0.591 ppm |
| 2019-05-28 | Q1928750007 | 0.348 ppm |
| 2019-09-03 | Q1961311001 | 1.15 ppm |
| 2019-09-03 | Q1961311002 | 0.170 ppm |
| 2019-12-12 | Q1979989001 | 0.352 ppm |
| 2019-12-12 | Q1979989002 | 0.194 ppm |
| 2020-02-12 | Q2005710001 | 0.281 ppm |
| 2020-02-12 | Q2005710002 | ND |
| 2020-05-07 | Q2018055003 | 0.391 ppm |
| 2020-05-07 | Q2018055004 | 0.249 ppm |
| 2020-09-23 | Q2037713001 | ND |
| 2020-09-23 | Q2037713002 | ND |
| 2020-11-23 | Q2046621022 | 0.320 ppm |
| 2020-11-23 | Q2046621023 | 0.673 ppm |
| 2020-11-23 | Q2046621024 | 0.0409 ppm |
| 2021-02-08 | Q2103700011 | 0.148 ppm |
| 2021-02-08 | Q2103700012 | 0.176 ppm |
| 2021-05-06 | Q2111768003 | 0.344 ppm |
| 2021-05-06 | Q2111768004 | 0.0314 ppm |
| 2021-08-04 | Q2120522001 | 0.162 ppm |
| 2021-08-04 | Q2120522002 | 0.769 ppm |
| 2021-10-19 | Q2129315001 | 0.191 ppm |
| 2021-10-19 | Q2129315002 | ND |
| 2022-02-10 | Q2204937001 | 0.910 ppm |
| 2022-02-10 | Q2204937004 | 0.709 ppm |
| 2022-04-25 | Q2212341001 | 0.874 ppm |
| 2022-04-25 | Q2212341004 | 1.12 ppm |
| 2022-08-24 | Q2225213002 | 0.953 ppm |
| 2022-08-24 | Q2225213001 | 0.530 ppm |
| 2022-11-29 | Q2235351002 | ND |
| 2022-11-29 | Q2235351003 | ND |
| 2022-11-29 | Q2235351004 | 1.65 ppm |
| 2022-11-29 | Q2235351011 | 0.888 ppm |
| 2023-03-13 | Q2309668001 | 0.342 ppm |
| 2023-03-13 | Q2309668002 | 0.963 ppm |
| 2023-05-30 | Q2319961001 | 0.752 ppm |
| 2023-05-30 | Q2319961002 | 0.750 ppm |
| 2023-08-21 | Q2335121001 | 0.221 ppm |
| 2023-08-21 | Q2335121002 | 0.933 ppm |
| 2023-11-28 | Q2350586003 | 0.346 ppm |
| 2023-11-28 | Q2350586004 | 1.27 ppm |