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.
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 |