Nitrate
Harris County MUD 200 Cranbrook
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 | 1.73 ppm | 6 | 6 | 1.61 ppm - 1.83 ppm |
| 2015 | 0.588 ppm | 5 | 5 | 0.260 ppm - 0.810 ppm |
| 2016 | 0.418 ppm | 5 | 5 | 0.0900 ppm - 0.680 ppm |
| 2017 | 0.588 ppm | 5 | 5 | 0.290 ppm - 0.930 ppm |
| 2018 | 0.372 ppm | 5 | 5 | 0.01000 ppm - 1.05 ppm |
| 2019 | 0.296 ppm | 5 | 5 | 0.160 ppm - 0.630 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 |
|---|---|---|
| 2014-02-24 | AC44122 | 1.62 ppm |
| 2014-02-24 | AC44118 | 1.83 ppm |
| 2014-02-24 | AC44123 | 1.61 ppm |
| 2014-02-24 | AC44124 | 1.76 ppm |
| 2014-02-24 | AC44119 | 1.82 ppm |
| 2014-02-24 | AC44120 | 1.71 ppm |
| 2015-01-22 | AC77280 | 0.560 ppm |
| 2015-01-22 | AC77281 | 0.260 ppm |
| 2015-01-22 | AC77260 | 0.810 ppm |
| 2015-01-22 | AC77259 | 0.660 ppm |
| 2015-01-22 | AC77258 | 0.650 ppm |
| 2016-02-11 | AD23264 | 0.680 ppm |
| 2016-02-11 | AD23237 | 0.640 ppm |
| 2016-02-11 | AD23235 | 0.360 ppm |
| 2016-02-11 | AD23231 | 0.0900 ppm |
| 2016-02-11 | AD23234 | 0.320 ppm |
| 2017-02-09 | AD69783 | 0.900 ppm |
| 2017-02-09 | AD69785 | 0.930 ppm |
| 2017-02-09 | AD69781 | 0.290 ppm |
| 2017-02-09 | AD69786 | 0.330 ppm |
| 2017-02-09 | AD69784 | 0.490 ppm |
| 2018-02-14 | AE13922 | 1.05 ppm |
| 2018-08-20 | AE37463 | 0.680 ppm |
| 2018-08-20 | AE37462 | 0.0600 ppm |
| 2018-08-20 | AE37464 | 0.0600 ppm |
| 2018-08-20 | AE37485 | 0.01000 ppm |
| 2019-02-04 | AE52615 | 0.160 ppm |
| 2019-02-04 | AE52581 | 0.220 ppm |
| 2019-02-04 | AE52582 | 0.270 ppm |
| 2019-02-04 | AE52591 | 0.630 ppm |
| 2019-02-04 | AE52592 | 0.200 ppm |