Nitrate
Gum Springs Water Supply Corporation 2
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 | 0.192 ppm | 3 | 3 | 0.170 ppm - 0.222 ppm |
| 2015 | 0.118 ppm | 3 | 3 | 0.0675 ppm - 0.165 ppm |
| 2016 | 0.305 ppm | 3 | 3 | 0.290 ppm - 0.332 ppm |
| 2017 | 0.379 ppm | 2 | 2 | 0.132 ppm - 0.626 ppm |
| 2018 | 0.353 ppm | 3 | 3 | 0.343 ppm - 0.361 ppm |
| 2019 | 0.0920 ppm | 2 | 2 | 0.0710 ppm - 0.113 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 |
|---|---|---|
| 2014-05-22 | Q1417601001 | 0.222 ppm |
| 2014-05-22 | Q1417601002 | 0.184 ppm |
| 2014-05-22 | Q1417601003 | 0.170 ppm |
| 2015-08-13 | Q1531975001 | 0.165 ppm |
| 2015-08-13 | Q1531975002 | 0.0675 ppm |
| 2015-08-13 | Q1531975003 | 0.121 ppm |
| 2016-11-18 | Q1650941001 | 0.293 ppm |
| 2016-11-18 | Q1650941002 | 0.332 ppm |
| 2016-11-18 | Q1650941003 | 0.290 ppm |
| 2017-11-27 | Q1760524001 | 0.132 ppm |
| 2017-11-27 | Q1760524002 | 0.626 ppm |
| 2018-02-27 | Q1808382002 | 0.343 ppm |
| 2018-02-27 | Q1808382004 | 0.354 ppm |
| 2018-12-06 | Q1849989002 | 0.361 ppm |
| 2019-07-11 | Q1944047001 | 0.0710 ppm |
| 2019-07-11 | Q1944047002 | 0.113 ppm |