Nitrate
City of Edmond - Arcadia Lake
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 | N/A | 0 | 0 | N/A |
| 2015 | 0.419 ppm | 1 | 1 | 0.419 ppm |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | 0.550 ppm | 3 | 3 | 0.460 ppm - 0.680 ppm |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | 0.809 ppm | 22 | 22 | 0.304 ppm - 2.42 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 |
|---|---|---|
| 2015-03-30 | 1382834 | 0.419 ppm |
| 2017-03-20 | 7C20037-01 | 0.460 ppm |
| 2017-03-21 | 7C21038-05 | 0.510 ppm |
| 2017-03-21 | 7C21038-04 | 0.680 ppm |
| 2019-07-23 | 1803769 | 0.798 ppm |
| 2019-07-23 | 1803778 | 0.870 ppm |
| 2019-07-23 | 1803777 | 0.482 ppm |
| 2019-07-23 | 1803776 | 0.304 ppm |
| 2019-07-23 | 1803775 | 0.735 ppm |
| 2019-07-23 | 1803773 | 0.730 ppm |
| 2019-07-23 | 1803772 | 0.772 ppm |
| 2019-07-23 | 1803771 | 0.649 ppm |
| 2019-07-23 | 1803770 | 0.351 ppm |
| 2019-07-23 | 1803768 | 0.640 ppm |
| 2019-07-23 | 1803767 | 1.33 ppm |
| 2019-07-23 | 1803766 | 1.02 ppm |
| 2019-07-23 | 1803765 | 1.70 ppm |
| 2019-07-23 | 1803764 | 0.461 ppm |
| 2019-07-23 | 1803763 | 1.30 ppm |
| 2019-07-23 | 1803762 | 0.317 ppm |
| 2019-07-23 | 1803760 | 1.07 ppm |
| 2019-07-23 | 1803758 | 0.378 ppm |
| 2019-07-23 | 1803753 | 0.465 ppm |
| 2019-07-23 | 1803752 | 0.399 ppm |
| 2019-08-12 | 1810232 | 2.42 ppm |
| 2019-09-30 | 1824734 | 0.609 ppm |