Nitrate and nitrite
Dota Public Water
Nitrate and nitrite enter water from fertilizer runoff, septic tanks and urban runoff. These contaminants can cause oxygen deprivation for infants and increase the risk of cancer. Nitrite is significantly more toxic than nitrate. Click here to read more about nitrate.
24
Samples
0
Samples exceeding legal limit (MCL)
24
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.410 ppm | 3 | 3 | 0.350 ppm - 0.460 ppm |
| 2015 | 0.365 ppm | 4 | 4 | 0.310 ppm - 0.490 ppm |
| 2016 | 0.298 ppm | 5 | 5 | 0.160 ppm - 0.380 ppm |
| 2017 | 0.383 ppm | 4 | 4 | 0.340 ppm - 0.410 ppm |
| 2018 | 0.360 ppm | 4 | 4 | 0.330 ppm - 0.380 ppm |
| 2019 | 0.235 ppm | 4 | 4 | 0.180 ppm - 0.300 ppm |
ppm = parts per million
State and national drinking water standards and health guidelines
EWG Health Guideline 0.14 ppm
The health guideline of 0.14 parts per million, or ppm, for nitrate and nitrite is based on the equivalent health guideline for nitrate, as defined in a peer-reviewed scientific study by EWG. This guideline represents a one-in-one-million annual cancer risk level.
EPA Maximum Contaminant
Level (MCL) 10 ppm
ppm = parts per million
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-02-12 | 140440010 | 0.460 ppm |
| 2014-04-14 | 141070008 | 0.420 ppm |
| 2014-09-08 | 142530009 | 0.350 ppm |
| 2015-03-02 | Y150630042 | 0.490 ppm |
| 2015-05-12 | Y151340004 | 0.310 ppm |
| 2015-08-11 | Y152250010 | 0.330 ppm |
| 2015-11-04 | Y153090009 | 0.330 ppm |
| 2016-02-23 | Y160560010 | 0.320 ppm |
| 2016-05-03 | Y161260014 | 0.160 ppm |
| 2016-08-08 | Y162240016 | 0.300 ppm |
| 2016-08-30 | Y162450027 | 0.330 ppm |
| 2016-10-25 | Y163020036 | 0.380 ppm |
| 2017-01-03 | Y170050017 | 0.340 ppm |
| 2017-05-30 | Y171520006 | 0.400 ppm |
| 2017-08-08 | Y172220024 | 0.410 ppm |
| 2017-11-01 | Y173060021 | 0.380 ppm |
| 2018-01-17 | Y180190021 | 0.360 ppm |
| 2018-05-15 | Y181360001 | 0.330 ppm |
| 2018-08-27 | Y182420029 | 0.380 ppm |
| 2018-10-17 | Y182910024 | 0.370 ppm |
| 2019-02-19 | Y190520014 | 0.180 ppm |
| 2019-05-07 | Y191290001 | 0.240 ppm |
| 2019-07-31 | Y192130010 | 0.220 ppm |
| 2019-11-06 | Y193110007 | 0.300 ppm |