Nitrate and nitrite
Pueblo Del Sol Water Company
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | 0.405 ppm | 4 | 4 | 0.260 ppm - 0.730 ppm |
2015 | 0.438 ppm | 4 | 4 | 0.300 ppm - 0.710 ppm |
2016 | 0.355 ppm | 4 | 3 | ND - 0.720 ppm |
2017 | 0.418 ppm | 4 | 4 | 0.240 ppm - 0.740 ppm |
2018 | N/A | 0 | 0 | N/A |
2019 | 0.528 ppm | 4 | 4 | 0.390 ppm - 0.810 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 |
---|---|---|
2014-09-25 | 4092185-08 | 0.260 ppm |
2014-09-25 | 4092185-07 | 0.310 ppm |
2014-09-25 | 4092185-06 | 0.320 ppm |
2014-09-25 | 4092185-05 | 0.730 ppm |
2015-12-08 | 5120778-04 | 0.300 ppm |
2015-12-08 | 5120778-03 | 0.340 ppm |
2015-12-08 | 5120778-02 | 0.400 ppm |
2015-12-08 | 5120778-01 | 0.710 ppm |
2016-04-14 | 6041320-03 | 0.300 ppm |
2016-04-14 | 6041320-04 | ND |
2016-04-14 | 6041320-02 | 0.400 ppm |
2016-04-14 | 6041320-01 | 0.720 ppm |
2017-05-31 | 7052925-04 | 0.240 ppm |
2017-05-31 | 7052925-03 | 0.280 ppm |
2017-05-31 | 7052925-02 | 0.410 ppm |
2017-05-31 | 7052925-01 | 0.740 ppm |
2019-01-30 | 19A3172-01 | 0.810 ppm |
2019-01-30 | 19A3172-04 | 0.390 ppm |
2019-01-30 | 19A3172-03 | 0.390 ppm |
2019-01-30 | 19A3172-02 | 0.520 ppm |