Nitrate and nitrite
Mansfield City
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.
70
Samples
0
Samples exceeding legal limit (MCL)
63
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | 0.373 ppm | 12 | 12 | 0.160 ppm - 0.590 ppm |
| 2015 | 0.365 ppm | 12 | 11 | ND - 0.680 ppm |
| 2016 | 0.305 ppm | 12 | 11 | ND - 0.620 ppm |
| 2017 | 0.378 ppm | 12 | 11 | ND - 0.830 ppm |
| 2018 | 0.472 ppm | 12 | 12 | 0.210 ppm - 0.790 ppm |
| 2019 | 0.446 ppm | 10 | 9 | ND - 0.900 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 |
|---|---|---|
| 2014-01-14 | 14-10509-02A | 0.550 ppm |
| 2014-02-19 | 14-12165-02A | 0.580 ppm |
| 2014-03-18 | 14-13205-02A | 0.590 ppm |
| 2014-04-15 | 14-14543-02A | 0.550 ppm |
| 2014-05-13 | 14-15808-02A | 0.440 ppm |
| 2014-06-17 | 14-17764-02A | 0.390 ppm |
| 2014-07-15 | 14-19231-02 | 0.420 ppm |
| 2014-08-12 | 14-20676-02A | 0.220 ppm |
| 2014-09-16 | 14-22690-02A | 0.180 ppm |
| 2014-10-15 | 14-24180-02A | 0.160 ppm |
| 2014-11-18 | 14-25811-02A | 0.220 ppm |
| 2014-12-16 | 14-27102-02A | 0.180 ppm |
| 2015-01-13 | 15-10445-02A | 0.300 ppm |
| 2015-02-18 | 15-11989-02 | 0.430 ppm |
| 2015-03-17 | 15-13225-02A | 0.520 ppm |
| 2015-04-14 | 15-14637-02A | 0.680 ppm |
| 2015-05-12 | 15-16046-02A | 0.500 ppm |
| 2015-06-16 | 15-18115-02 | 0.580 ppm |
| 2015-07-14 | 15-19730-02A | 0.470 ppm |
| 2015-08-18 | 15-21852-02A | 0.230 ppm |
| 2015-09-15 | 15-23472-02 | 0.300 ppm |
| 2015-10-14 | 15-25138-02 | 0.190 ppm |
| 2015-11-17 | 15-26892-02A | ND |
| 2015-12-15 | 15-28320-02A | 0.180 ppm |
| 2016-01-20 | 16-10895-02A | 0.490 ppm |
| 2016-02-17 | 16-12287-02A | 0.620 ppm |
| 2016-03-15 | 16-13711-02A | 0.120 ppm |
| 2016-04-12 | 16-15139-02 | 0.570 ppm |
| 2016-05-17 | 16-17063-02 | 0.580 ppm |
| 2016-06-13 | 16-18713-02 | 0.300 ppm |
| 2016-07-11 | 16-20495-02 | 0.140 ppm |
| 2016-08-15 | 16-23063-02A | 0.250 ppm |
| 2016-09-12 | 16-25019-02 | ND |
| 2016-10-17 | 16-27487-02 | 0.200 ppm |
| 2016-11-15 | 16-29308-02 | 0.200 ppm |
| 2016-12-12 | 16-30804-02 | 0.190 ppm |
| 2017-01-17 | 17-10924-02 | 0.430 ppm |
| 2017-02-13 | 17-12515-02 | 0.760 ppm |
| 2017-03-13 | 17-14360-02 | 0.830 ppm |
| 2017-04-13 | 17-16391-02 | 0.520 ppm |
| 2017-05-11 | 17-18235-02 | 0.260 ppm |
| 2017-06-13 | 17-20488-02A | 0.200 ppm |
| 2017-07-13 | 17-22738-02A | 0.340 ppm |
| 2017-08-14 | 17-25368-02A | 0.200 ppm |
| 2017-09-11 | 17-27280-02A | ND |
| 2017-10-12 | 17-29802-02A | 0.310 ppm |
| 2017-11-13 | 17-31911-02 | 0.200 ppm |
| 2017-12-11 | 17-33601-02A | 0.480 ppm |
| 2018-01-16 | 18-10896-02A | 0.540 ppm |
| 2018-02-12 | 18-12483-02A | 0.790 ppm |
| 2018-03-12 | 18-14389-02A | 0.660 ppm |
| 2018-04-12 | 18-16663-02A | 0.630 ppm |
| 2018-05-14 | 18-19060-02A | 0.440 ppm |
| 2018-06-12 | 18-21455-02A | 0.520 ppm |
| 2018-07-12 | 18-24174-02A | 0.270 ppm |
| 2018-08-13 | 18-26969-02A | 0.210 ppm |
| 2018-09-13 | 18-29805-02A | 0.250 ppm |
| 2018-10-11 | 18-32305-02 | 0.290 ppm |
| 2018-11-13 | 18-34726-02A | 0.490 ppm |
| 2018-12-13 | 18-37007-02A | 0.570 ppm |
| 2019-01-14 | 19-10971-02B | 0.620 ppm |
| 2019-02-11 | 19-12735-02A | 0.900 ppm |
| 2019-03-11 | 19-14716-02A | 0.660 ppm |
| 2019-04-15 | 19-17377-02A | 0.560 ppm |
| 2019-05-13 | 19-19542-02A | 0.590 ppm |
| 2019-06-13 | 19-22289-02A | 0.480 ppm |
| 2019-07-11 | 19-24635-02A | 0.300 ppm |
| 2019-08-12 | 19-27420-02A | ND |
| 2019-09-13 | 19-30453-02A | 0.120 ppm |
| 2019-10-11 | 19-33037-02A | 0.230 ppm |