Nitrate
City of Grand Prairie
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | 0.856 ppm | 12 | 12 | 0.398 ppm - 1.45 ppm |
| 2015 | 0.598 ppm | 11 | 11 | 0.0295 ppm - 1.28 ppm |
| 2016 | 0.556 ppm | 11 | 11 | 0.0740 ppm - 1.10 ppm |
| 2017 | 0.658 ppm | 10 | 10 | 0.194 ppm - 1.31 ppm |
| 2018 | 0.733 ppm | 7 | 7 | 0.420 ppm - 1.14 ppm |
| 2019 | 0.597 ppm | 4 | 4 | 0.510 ppm - 0.806 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 |
|---|---|---|
| 2014-04-23 | Q1412991004 | 0.993 ppm |
| 2014-06-04 | Q1419331005 | 0.996 ppm |
| 2014-06-26 | Q1424023037 | 1.37 ppm |
| 2014-06-26 | Q1424023032 | 0.805 ppm |
| 2014-06-26 | Q1424023015 | 0.470 ppm |
| 2014-06-26 | Q1424023014 | 0.554 ppm |
| 2014-06-26 | Q1424023013 | 1.45 ppm |
| 2014-06-26 | Q1424023009 | 1.29 ppm |
| 2014-06-26 | Q1424023008 | 0.434 ppm |
| 2014-09-10 | Q1442991001 | 0.796 ppm |
| 2014-09-10 | Q1442991010 | 0.398 ppm |
| 2014-09-10 | Q1442991009 | 0.715 ppm |
| 2015-06-09 | Q1521039001 | 0.868 ppm |
| 2015-06-09 | Q1521042003 | 0.472 ppm |
| 2015-07-14 | Q1526846004 | 0.350 ppm |
| 2015-07-14 | Q1526846003 | 0.319 ppm |
| 2015-07-14 | Q1526846002 | 1.28 ppm |
| 2015-07-14 | Q1526846001 | 1.18 ppm |
| 2015-10-07 | Q1539278005 | 0.0295 ppm |
| 2015-10-07 | Q1539278004 | 0.418 ppm |
| 2015-10-07 | Q1539278003 | 0.314 ppm |
| 2015-10-07 | Q1539278002 | 1.09 ppm |
| 2015-10-07 | Q1539278001 | 0.260 ppm |
| 2016-01-14 | Q1601730004 | 0.627 ppm |
| 2016-01-14 | Q1601730003 | 0.860 ppm |
| 2016-01-14 | Q1601730002 | 0.0740 ppm |
| 2016-01-14 | Q1601730001 | 1.10 ppm |
| 2016-03-01 | Q1608612002 | 0.578 ppm |
| 2016-03-01 | Q1608612001 | 0.702 ppm |
| 2016-07-14 | Q1628712005 | 0.107 ppm |
| 2016-07-14 | Q1628712004 | 0.344 ppm |
| 2016-10-05 | Q1642114004 | 0.807 ppm |
| 2016-10-05 | Q1642114003 | 0.376 ppm |
| 2016-12-05 | Q1652555004 | 0.538 ppm |
| 2017-01-05 | Q1700632024 | 0.870 ppm |
| 2017-01-05 | Q1700632008 | 0.546 ppm |
| 2017-06-27 | Q1726535029 | 1.29 ppm |
| 2017-06-27 | Q1726535004 | 0.471 ppm |
| 2017-06-27 | Q1726535005 | 0.561 ppm |
| 2017-06-27 | Q1726535030 | 0.322 ppm |
| 2017-06-27 | Q1726535006 | 0.303 ppm |
| 2017-06-27 | Q1726535012 | 1.31 ppm |
| 2017-08-14 | Q1735248001 | 0.194 ppm |
| 2017-08-14 | Q1735248006 | 0.714 ppm |
| 2018-05-24 | Q1820853015 | 0.580 ppm |
| 2018-05-24 | Q1820853014 | 0.716 ppm |
| 2018-05-24 | Q1820853013 | 1.14 ppm |
| 2018-05-24 | Q1820853004 | 0.855 ppm |
| 2018-08-29 | Q1834986002 | 0.853 ppm |
| 2018-12-04 | Q1849309002 | 0.420 ppm |
| 2018-12-10 | Q1850191001 | 0.569 ppm |
| 2019-06-03 | Q1930885002 | 0.542 ppm |
| 2019-06-03 | Q1930885001 | 0.530 ppm |
| 2019-12-09 | Q1979315004 | 0.510 ppm |
| 2019-12-09 | Q1979315013 | 0.806 ppm |