Nitrate
City of Frisco
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 | 0.119 ppm | 1 | 1 | 0.119 ppm |
| 2015 | 0.118 ppm | 1 | 1 | 0.118 ppm |
| 2016 | 0.494 ppm | 1 | 1 | 0.494 ppm |
| 2017 | 0.203 ppm | 6 | 6 | 0.0575 ppm - 0.379 ppm |
| 2018 | 0.510 ppm | 8 | 8 | 0.0923 ppm - 0.838 ppm |
| 2019 | 0.407 ppm | 8 | 8 | 0.0693 ppm - 0.695 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 |
|---|---|---|
| 2014-10-02 | Q1450579002 | 0.119 ppm |
| 2015-10-13 | Q1540034001 | 0.118 ppm |
| 2016-10-03 | Q1641451001 | 0.494 ppm |
| 2017-05-22 | Q1720683002 | 0.379 ppm |
| 2017-05-22 | Q1720683001 | 0.368 ppm |
| 2017-07-31 | Q1731632010 | 0.0655 ppm |
| 2017-07-31 | Q1731632009 | 0.0575 ppm |
| 2017-10-31 | Q1756023006 | 0.172 ppm |
| 2017-10-31 | Q1756023007 | 0.175 ppm |
| 2018-01-29 | Q1803506001 | 0.664 ppm |
| 2018-01-29 | Q1803506006 | 0.662 ppm |
| 2018-04-30 | Q1817688001 | 0.838 ppm |
| 2018-04-30 | Q1817688006 | 0.832 ppm |
| 2018-08-15 | Q1832795006 | 0.0923 ppm |
| 2018-08-15 | Q1832795001 | 0.0952 ppm |
| 2018-10-24 | Q1843008001 | 0.454 ppm |
| 2018-10-24 | Q1843008002 | 0.446 ppm |
| 2019-01-24 | Q1903701001 | 0.687 ppm |
| 2019-01-24 | Q1903701002 | 0.693 ppm |
| 2019-05-01 | Q1918293002 | 0.685 ppm |
| 2019-05-01 | Q1918293001 | 0.695 ppm |
| 2019-08-22 | Q1958338002 | 0.0709 ppm |
| 2019-08-22 | Q1958338001 | 0.0693 ppm |
| 2019-10-16 | Q1972950008 | 0.174 ppm |
| 2019-10-16 | Q1972950009 | 0.181 ppm |