Nitrate
Cottonwood Municipal Water Vv6
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 | 0.283 ppm | 4 | 4 | 0.240 ppm - 0.330 ppm |
2015 | 0.328 ppm | 4 | 4 | 0.190 ppm - 0.640 ppm |
2016 | 0.355 ppm | 6 | 6 | 0.160 ppm - 0.650 ppm |
2017 | 0.400 ppm | 6 | 6 | 0.170 ppm - 0.750 ppm |
2018 | 0.315 ppm | 6 | 5 | ND - 0.820 ppm |
2019 | 0.402 ppm | 6 | 6 | 0.180 ppm - 0.920 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 |
---|---|---|
2014-01-16 | 201401170112I | 0.330 ppm |
2014-01-16 | 201401170111I | 0.280 ppm |
2014-01-16 | 201401170110I | 0.280 ppm |
2014-01-16 | 201401170109I | 0.240 ppm |
2015-02-24 | 201502240280I | 0.190 ppm |
2015-02-24 | 201502240279I | 0.210 ppm |
2015-02-24 | 201502240278I | 0.640 ppm |
2015-02-24 | 201502240277I | 0.270 ppm |
2016-03-08 | 201603090138I | 0.370 ppm |
2016-03-08 | 201603090137I | 0.160 ppm |
2016-03-08 | 201603090136I | 0.330 ppm |
2016-03-08 | 201603090135I | 0.340 ppm |
2016-03-08 | 201603090134I | 0.650 ppm |
2016-03-08 | 201603090133I | 0.280 ppm |
2017-03-14 | 201703150279I | 0.400 ppm |
2017-03-14 | 201703150280I | 0.170 ppm |
2017-03-14 | 201703150278I | 0.410 ppm |
2017-03-14 | 201703150277I | 0.370 ppm |
2017-03-14 | 201703150276I | 0.750 ppm |
2017-03-14 | 201703150275I | 0.300 ppm |
2018-05-16 | 201805170498I | 0.370 ppm |
2018-05-16 | 201805170497I | 0.180 ppm |
2018-05-16 | 201805170496I | ND |
2018-05-16 | 201805170495I | 0.210 ppm |
2018-05-16 | 201805170494I | 0.820 ppm |
2018-05-16 | 201805170493I | 0.310 ppm |
2019-02-19 | 201902200068I | 0.300 ppm |
2019-02-19 | 201902200073I | 0.290 ppm |
2019-02-19 | 201902200072I | 0.180 ppm |
2019-02-19 | 201902200071I | 0.310 ppm |
2019-02-19 | 201902200070I | 0.410 ppm |
2019-02-19 | 201902200069I | 0.920 ppm |