Nitrate
Uxbridge DPW Water Division
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 | 0.836 ppm | 12 | 12 | 0.230 ppm - 1.10 ppm |
| 2015 | 0.817 ppm | 6 | 6 | 0.660 ppm - 1.10 ppm |
| 2016 | 0.732 ppm | 6 | 6 | 0.570 ppm - 1.000 ppm |
| 2017 | 0.850 ppm | 6 | 6 | 0.610 ppm - 1.20 ppm |
| 2018 | 0.800 ppm | 6 | 6 | 0.600 ppm - 1.10 ppm |
| 2019 | 0.900 ppm | 6 | 6 | 0.360 ppm - 1.40 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 |
|---|---|
| 2014-04-08 | 1.10 ppm |
| 2014-04-08 | 0.920 ppm |
| 2014-04-08 | 0.650 ppm |
| 2014-04-08 | 1.000 ppm |
| 2014-04-08 | 0.830 ppm |
| 2014-04-08 | 0.810 ppm |
| 2014-04-16 | 0.230 ppm |
| 2014-04-16 | 1.10 ppm |
| 2014-04-16 | 1.000 ppm |
| 2014-04-16 | 0.530 ppm |
| 2014-04-16 | 1.000 ppm |
| 2014-04-16 | 0.860 ppm |
| 2015-05-19 | 1.10 ppm |
| 2015-05-19 | 0.780 ppm |
| 2015-05-19 | 0.690 ppm |
| 2015-05-19 | 0.680 ppm |
| 2015-05-19 | 0.990 ppm |
| 2015-06-15 | 0.660 ppm |
| 2016-04-26 | 1.000 ppm |
| 2016-04-26 | 0.570 ppm |
| 2016-04-26 | 0.750 ppm |
| 2016-04-26 | 0.670 ppm |
| 2016-04-26 | 0.700 ppm |
| 2016-04-26 | 0.700 ppm |
| 2017-05-09 | 1.20 ppm |
| 2017-05-09 | 0.670 ppm |
| 2017-05-09 | 0.830 ppm |
| 2017-05-09 | 0.610 ppm |
| 2017-05-09 | 0.690 ppm |
| 2017-05-09 | 1.10 ppm |
| 2018-04-12 | 1.10 ppm |
| 2018-04-12 | 0.610 ppm |
| 2018-04-12 | 0.730 ppm |
| 2018-04-12 | 0.600 ppm |
| 2018-04-12 | 0.890 ppm |
| 2018-04-12 | 0.870 ppm |
| 2019-05-06 | 1.40 ppm |
| 2019-05-06 | 1.40 ppm |
| 2019-05-06 | 0.360 ppm |
| 2019-05-06 | 0.480 ppm |
| 2019-05-06 | 0.880 ppm |
| 2019-05-06 | 0.880 ppm |