Nitrate and nitrite
Avon Water Company
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.
38
Samples
0
Samples exceeding legal limit (MCL)
38
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 | 2.06 ppm | 8 | 8 | 0.620 ppm - 3.80 ppm |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | 2.06 ppm | 8 | 8 | 0.780 ppm - 3.60 ppm |
| 2017 | 1.96 ppm | 8 | 8 | 0.750 ppm - 3.10 ppm |
| 2018 | 2.00 ppm | 7 | 7 | 0.804 ppm - 4.04 ppm |
| 2019 | 1.91 ppm | 7 | 7 | 0.636 ppm - 4.16 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 |
|---|---|---|
| 2014-01-16 | E402153-8NOX | 3.80 ppm |
| 2014-02-04 | E402153-1NOX | 2.90 ppm |
| 2014-02-04 | E402153-7NOX | 0.930 ppm |
| 2014-02-04 | E402153-6NOX | 3.00 ppm |
| 2014-02-04 | E402153-5NOX | 0.620 ppm |
| 2014-02-04 | E402153-4NOX | 1.20 ppm |
| 2014-02-04 | E402153-3NOX | 1.000 ppm |
| 2014-02-04 | E402153-2NOX | 3.00 ppm |
| 2016-02-18 | E602H93-1NOX | 2.70 ppm |
| 2016-02-18 | E602H93-2NOX | 3.10 ppm |
| 2016-02-18 | E602H93-3NOX | 0.870 ppm |
| 2016-02-18 | E602H93-4NOX | 3.60 ppm |
| 2016-02-18 | E602H93-5NOX | 1.30 ppm |
| 2016-02-18 | E602H93-6NOX | 1.10 ppm |
| 2016-02-18 | E602H93-7NOX | 3.00 ppm |
| 2016-02-18 | E602H93-8NOX | 0.780 ppm |
| 2017-02-24 | E702M07-8NOX | 0.750 ppm |
| 2017-02-24 | E702M07-7NOX | 3.10 ppm |
| 2017-02-24 | E702M07-6NOX | 1.000 ppm |
| 2017-02-24 | E702M07-4NOX | 3.00 ppm |
| 2017-02-24 | E702M07-3NOX | 1.000 ppm |
| 2017-02-24 | E702M07-2NOX | 2.70 ppm |
| 2017-02-24 | E702M07-1NOX | 2.60 ppm |
| 2017-02-24 | E702M07-5NOX | 1.50 ppm |
| 2018-03-05 | D8C0238-07NOX | 3.12 ppm |
| 2018-03-05 | D8C0238-08NOX | 0.804 ppm |
| 2018-03-05 | D8C0238-06NOX | 0.917 ppm |
| 2018-03-05 | D8C0238-05NOX | 1.51 ppm |
| 2018-03-05 | D8C0238-04NOX | 4.04 ppm |
| 2018-03-05 | D8C0238-03NOX | 0.940 ppm |
| 2018-03-05 | D8C0238-02NOX | 2.66 ppm |
| 2019-01-29 | NOX 200519992 | 0.958 ppm |
| 2019-01-29 | NOX 200519993 | 4.16 ppm |
| 2019-01-29 | NOX 200519991 | 1.31 ppm |
| 2019-01-29 | NOX 200519996 | 0.636 ppm |
| 2019-01-29 | NOX 200519994 | 3.00 ppm |
| 2019-01-29 | NOX 200519995 | 1.04 ppm |
| 2019-08-06 | NOX 200543733 | 2.27 ppm |