Nitrate and nitrite

Conneaut

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

Samples

Samples exceeding legal limit (MCL)

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	0.211 ppm	12	11	ND - 0.450 ppm
2015	0.215 ppm	12	10	ND - 0.540 ppm
2016	0.264 ppm	12	10	ND - 0.700 ppm
2017	0.312 ppm	12	10	ND - 0.620 ppm
2018	0.267 ppm	12	11	ND - 0.660 ppm
2019	0.337 ppm	10	9	ND - 0.670 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
2014-01-08	14-10270-03	0.200 ppm
2014-02-10	14-11591-01	0.220 ppm
2014-03-03	14-12411-01	0.170 ppm
2014-04-01	14-13859-01A	0.220 ppm
2014-05-12	14-15718-04	0.450 ppm
2014-06-03	14-16845-03	0.380 ppm
2014-07-07	14-18773-03	0.310 ppm
2014-08-11	14-20620-01	0.160 ppm
2014-09-03	14-22002-03	0.140 ppm
2014-10-06	14-23724-03	ND
2014-11-10	14-25415-03	0.120 ppm
2014-12-01	14-26241-03	0.160 ppm
2015-01-06	15-10128-01A	0.240 ppm
2015-02-09	15-11541-07	0.250 ppm
2015-03-11	15-13188-01	0.210 ppm
2015-04-06	15-14152-03A	0.190 ppm
2015-05-12	15-16059-06	0.430 ppm
2015-06-01	15-17031-01	0.540 ppm
2015-07-06	15-19117-03	0.250 ppm
2015-08-10	15-21307-07	0.190 ppm
2015-09-14	15-23377-03	ND
2015-10-13	15-25066-03	ND
2015-11-10	15-26600-03	0.130 ppm
2015-12-07	15-27846-03	0.150 ppm
2016-01-12	16-10596-04A	0.330 ppm
2016-02-09	16-11919-04	0.260 ppm
2016-03-01	16-12871-03	0.140 ppm
2016-04-04	16-14656-01A	0.700 ppm
2016-05-09	16-16625-07	0.200 ppm
2016-06-06	16-18090-03	0.550 ppm
2016-07-05	16-19992-03	0.490 ppm
2016-08-08	16-22530-03	0.240 ppm
2016-09-06	16-24473-03	0.1000 ppm
2016-10-04	16-26513-03	ND
2016-11-08	16-28827-03	ND
2016-12-06	16-30259-03	0.160 ppm
2017-01-11	17-10609-03A	0.350 ppm
2017-02-08	17-12155-03	0.400 ppm
2017-03-07	17-13834-03	0.580 ppm
2017-04-04	17-15518-03A	0.470 ppm
2017-05-10	17-18070-03	0.620 ppm
2017-06-06	17-19693-03	0.400 ppm
2017-07-05	17-21845-03	0.460 ppm
2017-08-08	17-24708-03	0.150 ppm
2017-09-05	17-26763-03	ND
2017-10-10	17-29500-03	ND
2017-11-08	17-31748-03	0.170 ppm
2017-12-05	17-32993-03	0.140 ppm
2018-01-09	18-10444-03A	0.260 ppm
2018-02-06	18-12030-03	0.140 ppm
2018-03-06	18-13829-03	0.200 ppm
2018-04-10	18-16397-03A	0.300 ppm
2018-05-08	18-18458-03	0.660 ppm
2018-06-05	18-20572-03	0.320 ppm
2018-07-05	18-23608-03	0.480 ppm
2018-08-08	18-26701-03	0.270 ppm
2018-09-04	18-28856-03	0.160 ppm
2018-10-02	18-31539-03	ND
2018-11-13	18-34784-03	0.210 ppm
2018-12-04	18-36185-03	0.200 ppm
2019-01-08	19-10587-02A	0.280 ppm
2019-02-12	19-12880-04	0.670 ppm
2019-03-12	19-14868-03	0.270 ppm
2019-04-09	19-17028-03A	0.450 ppm
2019-05-13	19-19550-05	0.310 ppm
2019-06-04	19-21227-03	0.630 ppm
2019-07-02	19-23925-03	0.430 ppm
2019-08-12	19-27487-03	0.200 ppm
2019-09-17	19-30784-03	0.130 ppm
2019-10-08	19-32593-03	ND