Nitrate and nitrite

Wellston 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.

MORE ABOUT THIS CONTAMINANT

140

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	0.0825 ppm	24	10	ND - 0.360 ppm
2015	0.0817 ppm	24	10	ND - 0.300 ppm
2016	0.0521 ppm	24	7	ND - 0.330 ppm
2017	0.103 ppm	24	11	ND - 0.370 ppm
2018	0.0750 ppm	24	10	ND - 0.300 ppm
2019	0.102 ppm	20	9	ND - 0.320 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	14-10608-02	ND
2014-01-14	14-10608-04	0.240 ppm
2014-02-11	14-11723-01	ND
2014-02-11	14-11723-04	0.360 ppm
2014-03-11	14-12945-04	ND
2014-03-11	14-12945-06	0.290 ppm
2014-04-08	14-14247-01A	ND
2014-04-08	14-14247-03A	0.150 ppm
2014-05-13	14-15868-02A	ND
2014-05-13	14-15868-04A	0.130 ppm
2014-06-10	14-17490-01A	ND
2014-06-10	14-17490-03A	0.130 ppm
2014-07-08	14-18915-02	ND
2014-07-08	14-18915-04	0.240 ppm
2014-08-12	14-20742-02	ND
2014-08-12	14-20742-04	0.180 ppm
2014-09-10	14-22354-04	ND
2014-09-10	14-22354-06	ND
2014-10-07	14-23874-02	ND
2014-10-07	14-23874-03	ND
2014-11-11	14-25544-02	ND
2014-11-11	14-25544-04	0.140 ppm
2014-12-09	14-26808-03	ND
2014-12-10	14-26808-05	0.120 ppm
2015-01-13	15-10491-02	ND
2015-01-13	15-10491-04	0.220 ppm
2015-02-10	15-11657-01A	0.170 ppm
2015-02-10	15-11658-01A	ND
2015-03-10	15-12971-04	ND
2015-03-10	15-12971-06	0.300 ppm
2015-04-07	15-14308-01	ND
2015-04-07	15-14308-02	0.260 ppm
2015-05-12	15-16102-01A	ND
2015-05-12	15-16102-04A	0.120 ppm
2015-06-09	15-17777-03	ND
2015-06-09	15-17777-05	0.200 ppm
2015-07-07	15-19337-02	ND
2015-07-07	15-19337-04	ND
2015-08-11	15-21453-01	ND
2015-08-11	15-21453-04	0.230 ppm
2015-09-09	15-23128-01	ND
2015-09-09	15-23128-05	ND
2015-10-13	15-25092-01	ND
2015-10-13	15-25092-03	0.220 ppm
2015-11-10	15-26621-02	ND
2015-11-10	15-26621-04	0.110 ppm
2015-12-08	15-28002-02	ND
2015-12-08	15-28002-06	0.130 ppm
2016-01-12	16-10621-01A	ND
2016-01-12	16-10621-03A	0.260 ppm
2016-02-09	16-11971-01	ND
2016-02-09	16-11971-03	0.110 ppm
2016-03-08	16-13444-04	ND
2016-03-08	16-13444-06	0.140 ppm
2016-04-12	16-15243-02A	ND
2016-04-12	16-15243-04A	0.110 ppm
2016-05-10	16-16779-02	ND
2016-05-10	16-16779-04	ND
2016-06-07	16-18323-02	ND
2016-06-07	16-18323-06	ND
2016-07-13	16-20708-02	0.200 ppm
2016-07-13	16-20708-04	ND
2016-08-10	16-22788-01	ND
2016-08-10	16-22788-03	ND
2016-09-13	16-25227-03	ND
2016-09-13	16-25227-05	0.330 ppm
2016-10-11	16-27236-01	ND
2016-10-11	16-27236-03	ND
2016-11-09	16-28954-01	ND
2016-11-09	16-28954-02	ND
2016-12-13	16-30965-01	ND
2016-12-13	16-30965-05	0.1000 ppm
2017-01-11	17-10687-01	0.190 ppm
2017-01-11	17-10687-04	ND
2017-02-08	17-12234-03	0.260 ppm
2017-02-08	17-12234-01	ND
2017-03-08	17-14061-01	0.280 ppm
2017-03-08	17-14061-03	ND
2017-04-05	17-15787-03A	0.250 ppm
2017-04-05	17-15787-01A	ND
2017-05-10	17-18151-03	0.150 ppm
2017-05-10	17-18151-01	ND
2017-06-06	17-19976-06	0.1000 ppm
2017-06-06	17-19976-04	ND
2017-07-05	17-21904-03	ND
2017-07-05	17-21904-01	ND
2017-08-09	17-24972-01	0.230 ppm
2017-08-09	17-24972-03	ND
2017-09-13	17-27595-05	0.370 ppm
2017-09-13	17-27595-02	ND
2017-10-11	17-29664-01	0.370 ppm
2017-10-11	17-29664-03	ND
2017-11-08	17-31665-05	0.1000 ppm
2017-11-08	17-31665-01	ND
2017-12-13	17-33893-03	0.170 ppm
2017-12-13	17-33893-01	ND
2018-01-17	18-11051-06	0.150 ppm
2018-01-17	18-11051-03	ND
2018-02-21	18-13146-01A	0.190 ppm
2018-02-21	18-13146-03A	ND
2018-03-14	M18-14639-01	0.240 ppm
2018-03-14	M18-14639-05	ND
2018-04-11	18-16623-04A	0.170 ppm
2018-04-11	18-16623-01A	ND
2018-05-09	18-18687-01	ND
2018-05-09	18-18688-03	ND
2018-06-13	18-21693-01	0.120 ppm
2018-06-13	18-21693-03	ND
2018-07-11	18-24127-04	0.130 ppm
2018-07-11	18-24127-01	ND
2018-08-15	18-27295-04	0.160 ppm
2018-08-15	18-27295-01	ND
2018-09-12	18-29670-04	0.200 ppm
2018-09-12	18-29670-03	ND
2018-10-30	18-33777-04	0.140 ppm
2018-10-30	18-33777-02	ND
2018-11-14	18-34900-04	ND
2018-11-14	18-34900-02	ND
2018-12-12	18-36959-02	0.300 ppm
2018-12-12	18-36959-01	ND
2019-01-09	19-10673-04	0.250 ppm
2019-01-09	19-10673-02	ND
2019-02-13	19--12980-01	0.260 ppm
2019-02-13	M19-12981-02A	ND
2019-03-13	19-14958-03	0.250 ppm
2019-03-13	19-14958-01	ND
2019-04-10	19-17089-03A	0.220 ppm
2019-04-10	19-17089-01A	ND
2019-05-15	19-19792-03	0.130 ppm
2019-05-15	19-19792-01	ND
2019-06-12	19-22060-03	0.200 ppm
2019-06-12	19-22060-01	ND
2019-07-17	19-25246-04	0.160 ppm
2019-07-17	19-25246-02	ND
2019-08-07	19-26944-03	0.240 ppm
2019-08-07	19-26944-01	ND
2019-09-11	19-30203-04	0.320 ppm
2019-09-11	19-30203-02	ND
2019-10-09	19-32713-03	ND
2019-10-09	19-32713-01	ND