Nitrite
City of Post
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.
34
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 | ND | 3 | 0 | ND |
| 2015 | 0.441 ppm | 3 | 2 | ND - 0.787 ppm |
| 2016 | 0.458 ppm | 4 | 3 | ND - 0.757 ppm |
| 2017 | 0.201 ppm | 8 | 3 | ND - 0.800 ppm |
| 2018 | 0.192 ppm | 8 | 4 | ND - 0.514 ppm |
| 2019 | ND | 8 | 0 | ND |
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 |
|---|---|---|
| 2014-11-25 | Q1457318003 | ND |
| 2014-11-25 | Q1457318002 | ND |
| 2014-11-25 | Q1457318001 | ND |
| 2015-11-09 | Q1543982003 | 0.787 ppm |
| 2015-11-09 | Q1543982002 | ND |
| 2015-11-09 | Q1543982001 | 0.536 ppm |
| 2016-09-20 | Q1638689006 | ND |
| 2016-09-20 | Q1638689007 | 0.757 ppm |
| 2016-10-12 | Q1643590004 | 0.718 ppm |
| 2016-10-12 | Q1643590003 | 0.357 ppm |
| 2017-03-09 | Q1710013005 | ND |
| 2017-03-09 | Q1710013004 | ND |
| 2017-05-11 | Q1719514001 | ND |
| 2017-05-11 | Q1719514003 | ND |
| 2017-09-13 | Q1743186002 | 0.800 ppm |
| 2017-09-13 | Q1743186001 | 0.621 ppm |
| 2017-11-28 | Q1760216001 | 0.183 ppm |
| 2017-11-28 | Q1760216003 | ND |
| 2018-02-28 | Q1808151002 | ND |
| 2018-02-28 | Q1808151004 | ND |
| 2018-06-05 | Q1822235003 | 0.514 ppm |
| 2018-06-05 | Q1822235002 | ND |
| 2018-09-11 | Q1835794001 | ND |
| 2018-09-11 | Q1835794002 | 0.381 ppm |
| 2018-11-27 | Q1847968001 | 0.379 ppm |
| 2018-11-27 | Q1847968002 | 0.264 ppm |
| 2019-02-26 | Q1908106001 | ND |
| 2019-02-26 | Q1908106004 | ND |
| 2019-06-04 | Q1931749003 | ND |
| 2019-06-04 | Q1931749002 | ND |
| 2019-08-20 | Q1957085004 | ND |
| 2019-08-20 | Q1957085001 | ND |
| 2019-11-25 | Q1977981001 | ND |
| 2019-11-25 | Q1977981002 | ND |