Nitrate
Kingston Water Department
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 | 0.903 ppm | 7 | 7 | 0.140 ppm - 1.90 ppm |
| 2015 | 0.911 ppm | 7 | 6 | ND - 1.80 ppm |
| 2016 | 0.893 ppm | 6 | 6 | 0.200 ppm - 1.73 ppm |
| 2017 | 0.935 ppm | 6 | 6 | 0.140 ppm - 2.35 ppm |
| 2018 | 1.10 ppm | 6 | 6 | 0.276 ppm - 1.99 ppm |
| 2019 | 0.785 ppm | 6 | 6 | 0.216 ppm - 1.74 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 | Result |
|---|---|
| 2014-05-23 | 1.000 ppm |
| 2014-05-23 | 1.50 ppm |
| 2014-05-23 | 1.000 ppm |
| 2014-05-23 | 1.90 ppm |
| 2014-05-23 | 0.470 ppm |
| 2014-05-23 | 0.140 ppm |
| 2014-05-23 | 0.310 ppm |
| 2015-05-07 | 1.80 ppm |
| 2015-05-07 | 0.150 ppm |
| 2015-05-07 | ND |
| 2015-05-07 | 1.10 ppm |
| 2015-05-07 | 1.80 ppm |
| 2015-05-07 | 1.30 ppm |
| 2015-05-07 | 0.230 ppm |
| 2016-05-03 | 0.300 ppm |
| 2016-05-03 | 1.73 ppm |
| 2016-05-03 | 0.200 ppm |
| 2016-05-03 | 1.64 ppm |
| 2016-05-03 | 1.15 ppm |
| 2016-05-03 | 0.340 ppm |
| 2017-06-01 | 2.35 ppm |
| 2017-06-01 | 0.140 ppm |
| 2017-06-01 | 0.350 ppm |
| 2017-06-01 | 0.990 ppm |
| 2017-06-01 | 1.54 ppm |
| 2017-06-01 | 0.240 ppm |
| 2018-05-22 | 0.348 ppm |
| 2018-05-22 | 1.99 ppm |
| 2018-05-22 | 1.98 ppm |
| 2018-05-22 | 1.67 ppm |
| 2018-05-22 | 0.341 ppm |
| 2018-05-22 | 0.276 ppm |
| 2019-05-30 | 0.278 ppm |
| 2019-05-30 | 1.74 ppm |
| 2019-05-30 | 0.616 ppm |
| 2019-05-30 | 1.24 ppm |
| 2019-05-30 | 0.621 ppm |
| 2019-05-30 | 0.216 ppm |