Nitrate and nitrite
Vinton
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.
60
Samples
0
Samples exceeding legal limit (MCL)
37
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.453 ppm | 10 | 9 | ND - 1.54 ppm |
| 2015 | 0.430 ppm | 10 | 9 | ND - 1.25 ppm |
| 2016 | 0.670 ppm | 10 | 7 | ND - 3.15 ppm |
| 2017 | 0.482 ppm | 10 | 9 | ND - 1.47 ppm |
| 2018 | 0.422 ppm | 10 | 7 | ND - 1.51 ppm |
| 2019 | 0.572 ppm | 10 | 9 | ND - 1.72 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 |
|---|---|---|
| 2014-04-03 | 1404567-05A | 1.32 ppm |
| 2014-04-03 | 1404567-06A | 0.530 ppm |
| 2014-04-03 | 1404567-09A | 0.510 ppm |
| 2014-04-03 | 1404567-02A | 0.370 ppm |
| 2014-04-03 | 1404567-07A | 0.0900 ppm |
| 2014-04-03 | 1404567-04A | 0.0900 ppm |
| 2014-04-03 | 1404567-08A | 0.0500 ppm |
| 2014-04-03 | 1404567-01A | 0.0300 ppm |
| 2014-04-03 | 1404567-03A | ND |
| 2014-08-12 | 1408C93-01A | 1.54 ppm |
| 2015-04-03 | 00281-REI CONSUL | 0.480 ppm |
| 2015-04-03 | 00281-REI CONSUL | ND |
| 2015-04-03 | 00281-REI CONSUL | 0.0600 ppm |
| 2015-04-03 | 00281-REI CONSUL | 0.120 ppm |
| 2015-04-03 | 00281-REI CONSUL | 0.130 ppm |
| 2015-04-03 | 00281-REI CONSUL | 0.290 ppm |
| 2015-04-03 | 00281-REI CONSUL | 0.410 ppm |
| 2015-04-03 | 00281-REI CONSUL | 0.520 ppm |
| 2015-04-03 | 00281-REI CONSUL | 1.04 ppm |
| 2015-04-03 | 00281-REI CONSUL | 1.25 ppm |
| 2016-04-26 | 16042821-03A | 0.240 ppm |
| 2016-04-26 | 16042821-07A | ND |
| 2016-04-26 | 16042821-06A | ND |
| 2016-04-26 | 16042821-09A | ND |
| 2016-04-26 | 16042821-02A | 0.200 ppm |
| 2016-04-26 | 16042821-04A | 0.480 ppm |
| 2016-04-26 | 16042821-08A | 0.590 ppm |
| 2016-04-26 | 16042821-01A | 0.680 ppm |
| 2016-04-26 | 16042821-10A | 3.15 ppm |
| 2016-04-26 | 16042821-05A | 1.36 ppm |
| 2017-04-26 | 170429063-07A | 0.520 ppm |
| 2017-04-26 | 17042963-02A | 0.590 ppm |
| 2017-04-26 | 17042963-06A | ND |
| 2017-04-26 | 17042963-09A | 1.47 ppm |
| 2017-04-26 | 17042963-08A | 0.0900 ppm |
| 2017-04-26 | 17042963-03A | 0.150 ppm |
| 2017-04-26 | 17042963-01A | 0.160 ppm |
| 2017-04-26 | 17042963-05A | 1.29 ppm |
| 2017-04-26 | 17042963-04A | 0.480 ppm |
| 2017-05-04 | 17050729-01A | 0.0700 ppm |
| 2018-04-25 | 18043442-18A | ND |
| 2018-04-25 | 18043442-17A | 0.408 ppm |
| 2018-04-25 | 18043442-16A | 1.51 ppm |
| 2018-04-25 | 18043442-15A | 0.949 ppm |
| 2018-04-25 | 18043442-14A | 0.0245 ppm |
| 2018-04-25 | 18043442-13A | ND |
| 2018-04-25 | 18043442-12A | 0.642 ppm |
| 2018-04-25 | 18043442-11A | ND |
| 2018-04-25 | 18043442-10A | 0.589 ppm |
| 2018-04-25 | 18043442-09A | 0.0948 ppm |
| 2019-05-01 | 19050282-10A | 1.72 ppm |
| 2019-05-01 | 19050282-09A | 0.347 ppm |
| 2019-05-01 | 19050282-08A | 0.698 ppm |
| 2019-05-01 | 19050282-07A | 0.0498 ppm |
| 2019-05-01 | 19050282-06A | 0.0940 ppm |
| 2019-05-01 | 19050282-05A | ND |
| 2019-05-01 | 19050282-04A | 1.43 ppm |
| 2019-05-01 | 19050282-03A | 0.212 ppm |
| 2019-05-01 | 19050282-02A | 0.807 ppm |
| 2019-05-01 | 19050282-01A | 0.363 ppm |