Nitrate and nitrite
Warren City PWS
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.
71
Samples
0
Samples exceeding legal limit (MCL)
23
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.0808 ppm | 12 | 7 | ND - 0.200 ppm |
| 2015 | 0.108 ppm | 13 | 7 | ND - 0.280 ppm |
| 2016 | 0.0917 ppm | 12 | 6 | ND - 0.230 ppm |
| 2017 | 0.138 ppm | 12 | 7 | ND - 0.470 ppm |
| 2018 | 0.108 ppm | 12 | 5 | ND - 0.400 ppm |
| 2019 | 0.0430 ppm | 10 | 3 | ND - 0.220 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 |
|---|---|---|
| 2014-01-02 | 14-10098-01 | 0.120 ppm |
| 2014-02-06 | 14-11490-01 | 0.130 ppm |
| 2014-03-06 | 14-12647-01 | 0.140 ppm |
| 2014-04-03 | 14-13990-01A | 0.200 ppm |
| 2014-05-01 | 14-15199-01 | 0.140 ppm |
| 2014-06-05 | 14-17029-01 | 0.120 ppm |
| 2014-07-03 | 14-18684-01 | 0.120 ppm |
| 2014-08-07 | 14-20398-01 | ND |
| 2014-09-04 | 14-22036-01 | ND |
| 2014-10-02 | 14-23561-01 | ND |
| 2014-11-13 | 14-25606-01 | ND |
| 2014-12-03 | 14-26494-01 | ND |
| 2015-01-07 | 15-10259-01 | ND |
| 2015-01-07 | 15-10270-02 | 0.260 ppm |
| 2015-02-05 | 15-11414-01 | ND |
| 2015-03-05 | 15-12660-01 | 0.190 ppm |
| 2015-04-02 | 15-14026-04 | 0.250 ppm |
| 2015-05-07 | 15-15854-04A | 0.160 ppm |
| 2015-06-04 | 15-17425-01 | 0.160 ppm |
| 2015-07-02 | 15-19053-01 | 0.280 ppm |
| 2015-08-06 | 15-21096-03 | ND |
| 2015-09-03 | 15-22815-03 | ND |
| 2015-10-01 | 15-24306-03 | 0.1000 ppm |
| 2015-11-05 | 15-26319-03 | ND |
| 2015-12-03 | 15-27649-03 | ND |
| 2016-01-07 | 16-10332-03 | 0.170 ppm |
| 2016-02-04 | 16-11669-03 | 0.190 ppm |
| 2016-03-03 | 16-13065-03 | 0.210 ppm |
| 2016-04-07 | 16-14897-01A | 0.230 ppm |
| 2016-05-05 | 16-16474-03 | 0.180 ppm |
| 2016-06-02 | 16-17904-01 | ND |
| 2016-07-07 | 16-20295-03A | ND |
| 2016-08-04 | 16-22270-03 | ND |
| 2016-09-08 | 16-24839-03 | ND |
| 2016-10-06 | 16-26854-03 | ND |
| 2016-11-03 | 16-28619-03 | 0.120 ppm |
| 2016-12-08 | 16-30602-03 | ND |
| 2017-01-05 | 17-10315-03 | ND |
| 2017-02-02 | 17-11834-03 | 0.240 ppm |
| 2017-03-02 | 17-13649-03 | 0.470 ppm |
| 2017-04-06 | 17-15889-03A | 0.340 ppm |
| 2017-05-04 | 17-17757-03 | 0.200 ppm |
| 2017-06-01 | 17-19482-03 | 0.120 ppm |
| 2017-07-06 | 17-22112-03A | 0.170 ppm |
| 2017-08-03 | 17-24453-03 | ND |
| 2017-09-07 | 17-27114-03 | ND |
| 2017-10-05 | 17-29290-04 | ND |
| 2017-11-02 | 17-31227-04 | ND |
| 2017-12-07 | 17-33454-04 | 0.110 ppm |
| 2018-01-04 | 18-10311-04 | ND |
| 2018-02-08 | 18-12342-04 | ND |
| 2018-03-08 | 18-14216-04 | 0.380 ppm |
| 2018-04-05 | 18-16210-04 | 0.400 ppm |
| 2018-05-03 | 18-18222-04 | 0.210 ppm |
| 2018-06-07 | 18-21106-03 | 0.160 ppm |
| 2018-07-05 | 18-23535-03 | ND |
| 2018-08-02 | 18-26064-03 | ND |
| 2018-09-06 | 18-29149-04 | ND |
| 2018-10-04 | 18-31773-04 | 0.150 ppm |
| 2018-11-08 | 18-34508-04 | ND |
| 2018-12-06 | 18-36444-04 | ND |
| 2019-01-03 | 19-10191-04 | ND |
| 2019-02-07 | 19-12573-04 | ND |
| 2019-03-07 | 19-14571-04 | ND |
| 2019-04-04 | 19-16694-04 | 0.220 ppm |
| 2019-05-02 | 19-18697-04 | ND |
| 2019-06-06 | 19-21583-04 | 0.110 ppm |
| 2019-07-11 | 19-24805-03 | 0.1000 ppm |
| 2019-08-01 | M19-26441-02 | ND |
| 2019-09-05 | 19-29729-03 | ND |
| 2019-10-03 | 19-32258-02 | ND |