Nitrate
City of Haslet
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 |
|---|---|---|---|---|
| 2018 | 0.385 ppm | 3 | 3 | 0.381 ppm - 0.389 ppm |
| 2019 | 0.551 ppm | 3 | 3 | 0.533 ppm - 0.574 ppm |
| 2020 | 0.374 ppm | 2 | 2 | 0.370 ppm - 0.378 ppm |
| 2021 | 0.219 ppm | 6 | 6 | 0.155 ppm - 0.314 ppm |
| 2022 | 0.244 ppm | 6 | 6 | 0.114 ppm - 0.412 ppm |
| 2023 | 0.410 ppm | 6 | 6 | 0.273 ppm - 0.606 ppm |
ppm = parts per million
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 0.14 ppm
The EWG health guideline of 0.14 parts per million, or ppm, for nitrate and nitrite is based on the equivalent health guideline for nitrate, as defined in a peer-reviewed scientific study by EWG. This guideline represents a one-in-one-million annual cancer risk level.
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 |
|---|---|---|
| 2018-03-28 | Q1812845005 | 0.385 ppm |
| 2018-03-28 | Q1812845006 | 0.389 ppm |
| 2018-03-28 | Q1812845002 | 0.381 ppm |
| 2019-09-25 | Q1968757004 | 0.574 ppm |
| 2019-09-25 | Q1968757005 | 0.545 ppm |
| 2019-09-25 | Q1968757006 | 0.533 ppm |
| 2020-08-17 | Q2032700004 | 0.378 ppm |
| 2020-08-17 | Q2032700005 | 0.370 ppm |
| 2021-03-01 | Q2105135001 | 0.156 ppm |
| 2021-04-27 | Q2110662001 | 0.187 ppm |
| 2021-04-27 | Q2110662002 | 0.155 ppm |
| 2021-04-27 | Q2110662003 | 0.193 ppm |
| 2021-08-05 | Q2120714002 | 0.307 ppm |
| 2021-12-08 | Q2134359001 | 0.314 ppm |
| 2022-03-07 | Q2207628001 | 0.122 ppm |
| 2022-03-07 | Q2207628002 | 0.114 ppm |
| 2022-03-07 | Q2207628003 | 0.117 ppm |
| 2022-06-09 | Q2216225001 | 0.325 ppm |
| 2022-09-21 | Q2228247001 | 0.412 ppm |
| 2022-12-13 | Q2237311001 | 0.376 ppm |
| 2023-03-09 | Q2309405001 | 0.606 ppm |
| 2023-03-09 | Q2309405002 | 0.273 ppm |
| 2023-03-09 | Q2309405003 | 0.422 ppm |
| 2023-05-17 | Q2318623001 | 0.302 ppm |
| 2023-09-20 | Q2340860001 | 0.463 ppm |
| 2023-12-13 | Q2353411001 | 0.396 ppm |