Nitrite
City of Scotland
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.
20
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 |
|---|---|---|---|---|
| 2014 | 0.564 ppm | 1 | 1 | 0.564 ppm |
| 2015 | 0.188 ppm | 3 | 2 | ND - 0.292 ppm |
| 2016 | 0.110 ppm | 4 | 1 | ND - 0.440 ppm |
| 2017 | 0.130 ppm | 4 | 2 | ND - 0.453 ppm |
| 2018 | 0.278 ppm | 4 | 3 | ND - 0.504 ppm |
| 2019 | 0.121 ppm | 4 | 3 | ND - 0.351 ppm |
ppm = parts per million
State and national drinking water standards and health guidelines
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 |
|---|---|---|
| 2014-08-12 | Q1435686001 | 0.564 ppm |
| 2015-06-10 | Q1521379002 | ND |
| 2015-07-21 | Q1528236001 | 0.271 ppm |
| 2015-11-18 | Q1545522001 | 0.292 ppm |
| 2016-02-29 | Q1608268002 | ND |
| 2016-04-20 | Q1615774001 | ND |
| 2016-08-03 | Q1632243001 | 0.440 ppm |
| 2016-11-16 | Q1650243001 | ND |
| 2017-03-06 | Q1709224001 | ND |
| 2017-04-24 | Q1716597001 | ND |
| 2017-08-10 | Q1734624002 | 0.453 ppm |
| 2017-11-15 | Q1758820002 | 0.0666 ppm |
| 2018-02-14 | Q1806394002 | ND |
| 2018-06-21 | Q1825063002 | 0.234 ppm |
| 2018-09-10 | Q1835684002 | 0.504 ppm |
| 2018-11-28 | Q1848562001 | 0.373 ppm |
| 2019-02-13 | Q1906762001 | 0.0980 ppm |
| 2019-05-21 | Q1927491001 | 0.0360 ppm |
| 2019-09-16 | Q1965550001 | 0.351 ppm |
| 2019-12-03 | Q1978649001 | ND |