Nitrate
Centerville Osterville Marstons Mills WD
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | 2.88 ppm | 23 | 23 | 0.1000 ppm - 6.00 ppm |
2015 | 2.68 ppm | 26 | 25 | ND - 5.30 ppm |
2016 | 2.51 ppm | 25 | 25 | 0.120 ppm - 4.96 ppm |
2017 | 2.33 ppm | 22 | 22 | 0.1000 ppm - 4.89 ppm |
2018 | 2.48 ppm | 25 | 25 | 0.130 ppm - 4.98 ppm |
2019 | 4.63 ppm | 6 | 6 | 4.49 ppm - 4.94 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 |
---|---|
2014-03-13 | 4.50 ppm |
2014-05-12 | 4.40 ppm |
2014-08-13 | 3.80 ppm |
2014-08-13 | 3.20 ppm |
2014-08-13 | 2.50 ppm |
2014-08-13 | 3.20 ppm |
2014-08-13 | 3.80 ppm |
2014-08-13 | 3.70 ppm |
2014-08-13 | 0.500 ppm |
2014-08-13 | 0.520 ppm |
2014-08-13 | 0.990 ppm |
2014-08-13 | 2.40 ppm |
2014-08-13 | 2.60 ppm |
2014-08-13 | 0.120 ppm |
2014-08-13 | 6.00 ppm |
2014-08-13 | 3.20 ppm |
2014-08-13 | 6.00 ppm |
2014-08-13 | 0.930 ppm |
2014-08-13 | 0.1000 ppm |
2014-08-13 | 0.150 ppm |
2014-08-13 | 2.90 ppm |
2014-12-17 | 5.70 ppm |
2014-12-22 | 5.00 ppm |
2015-02-25 | 5.20 ppm |
2015-02-25 | 5.30 ppm |
2015-06-10 | 4.80 ppm |
2015-06-10 | 4.80 ppm |
2015-08-11 | 2.74 ppm |
2015-08-11 | 3.72 ppm |
2015-08-11 | 1.95 ppm |
2015-08-11 | 2.76 ppm |
2015-08-11 | 4.29 ppm |
2015-08-11 | 3.70 ppm |
2015-08-11 | 0.420 ppm |
2015-08-11 | 0.480 ppm |
2015-08-11 | 0.800 ppm |
2015-08-11 | 0.820 ppm |
2015-08-11 | 1.95 ppm |
2015-08-11 | 0.120 ppm |
2015-08-11 | 4.70 ppm |
2015-08-11 | 2.71 ppm |
2015-08-11 | 4.72 ppm |
2015-08-11 | 0.660 ppm |
2015-08-11 | 0.1000 ppm |
2015-08-11 | 0.180 ppm |
2015-08-11 | ND |
2015-08-11 | 3.82 ppm |
2015-12-08 | 4.23 ppm |
2015-12-08 | 4.83 ppm |
2016-02-02 | 4.61 ppm |
2016-02-02 | 4.59 ppm |
2016-06-23 | 4.25 ppm |
2016-06-23 | 4.26 ppm |
2016-08-25 | 2.74 ppm |
2016-08-25 | 2.36 ppm |
2016-08-25 | 1.88 ppm |
2016-08-25 | 2.37 ppm |
2016-08-25 | 3.50 ppm |
2016-08-25 | 3.10 ppm |
2016-08-25 | 0.490 ppm |
2016-08-25 | 0.360 ppm |
2016-08-25 | 0.850 ppm |
2016-08-25 | 1.36 ppm |
2016-08-25 | 2.05 ppm |
2016-08-25 | 0.200 ppm |
2016-08-25 | 4.45 ppm |
2016-08-25 | 2.40 ppm |
2016-08-25 | 4.41 ppm |
2016-08-25 | 0.730 ppm |
2016-08-25 | 0.120 ppm |
2016-08-25 | 0.240 ppm |
2016-08-25 | 2.01 ppm |
2016-11-23 | 4.46 ppm |
2016-11-23 | 4.96 ppm |
2017-03-15 | 4.35 ppm |
2017-03-15 | 4.36 ppm |
2017-05-17 | 4.89 ppm |
2017-05-17 | 4.78 ppm |
2017-08-15 | 2.06 ppm |
2017-08-15 | 2.07 ppm |
2017-08-15 | 2.01 ppm |
2017-08-16 | 1.03 ppm |
2017-08-16 | 1.86 ppm |
2017-08-16 | 2.18 ppm |
2017-08-17 | 3.46 ppm |
2017-08-17 | 2.92 ppm |
2017-08-17 | 0.370 ppm |
2017-08-17 | 0.820 ppm |
2017-08-17 | 1.45 ppm |
2017-08-17 | 1.91 ppm |
2017-08-17 | 0.170 ppm |
2017-08-17 | 4.57 ppm |
2017-08-17 | 4.55 ppm |
2017-08-17 | 1.03 ppm |
2017-08-17 | 0.1000 ppm |
2017-08-17 | 0.260 ppm |
2018-02-09 | 4.22 ppm |
2018-02-09 | 4.65 ppm |
2018-05-07 | 2.74 ppm |
2018-05-07 | 2.68 ppm |
2018-08-10 | 4.42 ppm |
2018-08-10 | 3.94 ppm |
2018-08-10 | 4.44 ppm |
2018-08-10 | 4.42 ppm |
2018-08-16 | 0.390 ppm |
2018-08-16 | 0.400 ppm |
2018-08-16 | 0.740 ppm |
2018-08-16 | 1.20 ppm |
2018-08-16 | 1.79 ppm |
2018-08-16 | 0.140 ppm |
2018-08-16 | 0.720 ppm |
2018-08-16 | 0.130 ppm |
2018-08-16 | 0.210 ppm |
2018-09-07 | 3.00 ppm |
2018-09-07 | 3.17 ppm |
2018-09-07 | 2.09 ppm |
2018-09-07 | 2.15 ppm |
2018-09-07 | 2.35 ppm |
2018-09-07 | 2.31 ppm |
2018-10-23 | 4.98 ppm |
2018-10-23 | 4.77 ppm |
2019-03-21 | 4.71 ppm |
2019-03-21 | 4.61 ppm |
2019-04-09 | 4.94 ppm |
2019-04-09 | 4.55 ppm |
2019-10-22 | 4.49 ppm |
2019-10-22 | 4.49 ppm |