Nitrate and nitrite
Cincinnati Public Water System
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.
47
Samples
0
Samples exceeding legal limit (MCL)
47
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 | 0.992 ppm | 9 | 9 | 0.700 ppm - 1.43 ppm |
| 2015 | 0.875 ppm | 2 | 2 | 0.850 ppm - 0.900 ppm |
| 2016 | 0.821 ppm | 8 | 8 | 0.530 ppm - 1.51 ppm |
| 2017 | 0.965 ppm | 11 | 11 | 0.550 ppm - 1.39 ppm |
| 2018 | 0.759 ppm | 12 | 12 | 0.400 ppm - 1.24 ppm |
| 2019 | 0.926 ppm | 5 | 5 | 0.830 ppm - 1.08 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 |
|---|---|---|
| 2014-01-07 | 14-10191-02 | 0.860 ppm |
| 2014-01-22 | 14-10966-03 | 1.39 ppm |
| 2014-02-04 | 14-11384-02 | 1.02 ppm |
| 2014-03-04 | 14-12493-02 | 0.880 ppm |
| 2014-04-01 | 14-13834-04 | 0.940 ppm |
| 2014-05-06 | 14-15388-02 | 0.700 ppm |
| 2014-06-03 | 14-16801-02 | 0.940 ppm |
| 2014-07-08 | 14-18879-01 | 1.43 ppm |
| 2014-08-14 | 14-20944-01 | 0.770 ppm |
| 2015-02-03 | 15-11380-02 | 0.850 ppm |
| 2015-03-03 | 15-12502-07 | 0.900 ppm |
| 2016-01-27 | 16-11227-02 | 1.51 ppm |
| 2016-03-07 | 16-13263-05 | 1.04 ppm |
| 2016-04-13 | 16-15284-01 | 0.800 ppm |
| 2016-08-18 | 16-23492-09 | 0.530 ppm |
| 2016-09-15 | 16-25419-01 | 0.630 ppm |
| 2016-10-12 | 16-27315-01 | 0.590 ppm |
| 2016-11-09 | 16-29034-08 | 0.780 ppm |
| 2016-12-07 | 16-30559-02 | 0.690 ppm |
| 2017-01-11 | 17-10716-05 | 1.06 ppm |
| 2017-02-02 | 17-11893-05 | 1.08 ppm |
| 2017-02-02 | 17-11892-01 | 0.940 ppm |
| 2017-03-01 | 17-13583-05 | 1.07 ppm |
| 2017-04-05 | 17-15824-03 | 0.800 ppm |
| 2017-05-10 | 17-18197-04 | 0.820 ppm |
| 2017-06-07 | 17-20032-08 | 0.880 ppm |
| 2017-07-05 | 17-22203-07 | 1.33 ppm |
| 2017-07-12 | 17-22693-03 | 1.39 ppm |
| 2017-09-06 | 17-27070-01 | 0.550 ppm |
| 2017-09-26 | 17-28584-02 | 0.700 ppm |
| 2018-02-07 | 18-12300-04A | 1.24 ppm |
| 2018-04-19 | 18-17259-01 | 0.710 ppm |
| 2018-05-02 | 18-18113-01 | 0.670 ppm |
| 2018-05-23 | 18-19897-01 | 0.400 ppm |
| 2018-06-20 | 18-22831-02 | 0.970 ppm |
| 2018-07-11 | 18-24414-02 | 0.790 ppm |
| 2018-07-25 | 18-25581-02 | 0.690 ppm |
| 2018-08-03 | 18-26694-01 | 0.580 ppm |
| 2018-09-05 | 18-29223-02 | 0.610 ppm |
| 2018-10-03 | 18-32425-01 | 0.800 ppm |
| 2018-11-07 | 18-34580-01 | 0.780 ppm |
| 2018-12-05 | 18-36372-01 | 0.870 ppm |
| 2019-01-09 | 19-10755-01 | 0.860 ppm |
| 2019-01-30 | 19-12095-06 | 1.08 ppm |
| 2019-02-05 | 19-12529-01 | 1.000 ppm |
| 2019-03-06 | 19-14486-01 | 0.830 ppm |
| 2019-04-03 | 19-16633-01 | 0.860 ppm |