Nitrate
City of Wylie
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 | 1.26 ppm | 3 | 3 | 1.20 ppm - 1.29 ppm |
| 2015 | 0.636 ppm | 3 | 3 | 0.458 ppm - 0.732 ppm |
| 2016 | 0.214 ppm | 3 | 3 | 0.186 ppm - 0.229 ppm |
| 2017 | 0.103 ppm | 3 | 3 | 0.0981 ppm - 0.110 ppm |
| 2018 | 0.0602 ppm | 3 | 3 | 0.0527 ppm - 0.0731 ppm |
| 2019 | 0.710 ppm | 3 | 3 | 0.597 ppm - 0.768 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 |
|---|---|---|
| 2014-04-08 | Q1410812001 | 1.29 ppm |
| 2014-04-08 | Q1410812006 | 1.28 ppm |
| 2014-04-08 | Q1410812005 | 1.20 ppm |
| 2015-04-23 | Q1515259002 | 0.732 ppm |
| 2015-04-23 | Q1515259001 | 0.717 ppm |
| 2015-11-19 | Q1545845001 | 0.458 ppm |
| 2016-10-17 | Q1644219001 | 0.186 ppm |
| 2016-10-17 | Q1644219003 | 0.229 ppm |
| 2016-10-17 | Q1644219002 | 0.226 ppm |
| 2017-10-18 | Q1753895005 | 0.102 ppm |
| 2017-10-18 | Q1753895001 | 0.0981 ppm |
| 2017-10-18 | Q1753895004 | 0.110 ppm |
| 2018-07-27 | Q1830106004 | 0.0731 ppm |
| 2018-07-27 | Q1830106003 | 0.0527 ppm |
| 2018-07-27 | Q1830106002 | 0.0548 ppm |
| 2019-01-15 | Q1902043002 | 0.768 ppm |
| 2019-01-15 | Q1902043003 | 0.597 ppm |
| 2019-01-15 | Q1902043001 | 0.766 ppm |