Nitrate
Bridgestone MUD
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 | 0.327 ppm | 3 | 3 | 0.110 ppm - 0.570 ppm |
| 2015 | 0.513 ppm | 3 | 3 | 0.0900 ppm - 0.950 ppm |
| 2016 | 0.150 ppm | 2 | 2 | 0.0600 ppm - 0.240 ppm |
| 2017 | 0.245 ppm | 4 | 4 | 0.0700 ppm - 0.430 ppm |
| 2018 | 0.312 ppm | 6 | 6 | 0.0800 ppm - 0.780 ppm |
| 2019 | 0.412 ppm | 6 | 5 | ND - 1.10 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 |
|---|---|---|
| 2014-02-14 | AC42963 | 0.570 ppm |
| 2014-02-14 | AC42969 | 0.110 ppm |
| 2014-04-04 | AC49374 | 0.300 ppm |
| 2015-03-03 | AC82453 | 0.950 ppm |
| 2015-03-03 | AC82454 | 0.500 ppm |
| 2015-03-03 | AC82449 | 0.0900 ppm |
| 2016-06-10 | AD40119 | 0.240 ppm |
| 2016-12-06 | AD60509 | 0.0600 ppm |
| 2017-01-27 | AD67409 | 0.430 ppm |
| 2017-01-27 | AD67410 | 0.0700 ppm |
| 2017-04-28 | AD81658 | 0.310 ppm |
| 2017-11-28 | AE05841 | 0.170 ppm |
| 2018-03-02 | AE16543 | 0.0900 ppm |
| 2018-05-11 | AE26053 | 0.340 ppm |
| 2018-05-21 | AE26903 | 0.380 ppm |
| 2018-05-21 | AE26902 | 0.0800 ppm |
| 2018-07-27 | AE34797 | 0.200 ppm |
| 2018-10-19 | AE44031 | 0.780 ppm |
| 2019-01-11 | AE49426 | 0.0800 ppm |
| 2019-01-11 | AE49467 | 0.230 ppm |
| 2019-02-22 | AE55550 | ND |
| 2019-04-03 | AE60929 | 1.10 ppm |
| 2019-07-22 | AE75168 | 0.160 ppm |
| 2019-12-06 | AE91582 | 0.900 ppm |