Nitrate
Rockett SUD
Nitrate, a fertilizer chemical, frequently contaminates drinking water due to agricultural and urban runoff, and discharges from municipal wastewater treatment plants and septic tanks. Excessive nitrate in water can cause oxygen deprivation in infants and increase the risk of cancer. Click here to read more about nitrate.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.195 ppm | 2 | 2 | 0.107 ppm - 0.283 ppm |
| 2015 | 0.281 ppm | 2 | 2 | 0.265 ppm - 0.296 ppm |
| 2016 | 0.131 ppm | 2 | 2 | 0.102 ppm - 0.160 ppm |
| 2017 | 0.0915 ppm | 2 | 2 | 0.0590 ppm - 0.124 ppm |
| 2018 | 0.323 ppm | 6 | 6 | 0.0999 ppm - 0.524 ppm |
| 2019 | 0.569 ppm | 9 | 9 | 0.0894 ppm - 1.64 ppm |
ppm = parts per million
State and national drinking water standards and health guidelines
EWG Health Guideline 0.14 ppm
The EWG Health Guideline of 0.14 ppm for nitrate was defined by EWG . This health guideline protects against cancer and harm to fetal growth and development.
EPA Maximum Contaminant
Level (MCL) 10 ppm
The legal limit for nitrate, established in 1962, was developed to protect infants from acute methemoglobinemia, a life-threatening disorder of oxygen transport in the body. This limit does not fully protect against the risk of cancer and harm to the developing fetus.
ppm = parts per million
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-12-16 | Q1460152006 | 0.283 ppm |
| 2014-12-16 | Q1460152001 | 0.107 ppm |
| 2015-04-20 | Q1514632002 | 0.296 ppm |
| 2015-04-20 | Q1514632001 | 0.265 ppm |
| 2016-12-05 | Q1652664002 | 0.160 ppm |
| 2016-12-05 | Q1652664001 | 0.102 ppm |
| 2017-11-27 | Q1760054002 | 0.124 ppm |
| 2017-11-27 | Q1760054001 | 0.0590 ppm |
| 2018-06-06 | Q1822554002 | 0.278 ppm |
| 2018-06-13 | Q1823546001 | 0.158 ppm |
| 2018-08-13 | Q1832219003 | 0.0999 ppm |
| 2018-08-13 | Q1832219006 | 0.420 ppm |
| 2018-12-03 | Q1848944006 | 0.524 ppm |
| 2018-12-03 | Q1848944003 | 0.457 ppm |
| 2019-02-27 | Q1908360003 | 0.478 ppm |
| 2019-02-27 | Q1908360002 | 0.530 ppm |
| 2019-02-27 | Q1908360001 | 0.576 ppm |
| 2019-05-09 | Q1923161002 | 1.64 ppm |
| 2019-05-09 | Q1923161001 | 1.02 ppm |
| 2019-08-12 | Q1953425002 | 0.178 ppm |
| 2019-08-12 | Q1953425001 | 0.0894 ppm |
| 2019-12-04 | Q1979071001 | 0.172 ppm |
| 2019-12-04 | Q1979071002 | 0.437 ppm |