Nitrate and nitrite
Pritchett Water Supply Corporation
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.
16
Samples
0
Samples exceeding legal limit (MCL)
1
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.0248 ppm | 3 | 3 | 0.0180 ppm - 0.0345 ppm |
| 2015 | 0.0742 ppm | 13 | 13 | 0.0215 ppm - 0.327 ppm |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
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 |
|---|---|---|
| 2014-01-22 | Q1402022005 | 0.0180 ppm |
| 2014-01-22 | Q1402022006 | 0.0220 ppm |
| 2014-06-25 | Q1423783018 | 0.0345 ppm |
| 2015-03-12 | Q1509329002 | 0.0300 ppm |
| 2015-06-23 | Q1523409001 | 0.0215 ppm |
| 2015-06-23 | Q1523409002 | 0.0570 ppm |
| 2015-06-23 | Q1523409003 | 0.0615 ppm |
| 2015-06-23 | Q1523409004 | 0.0620 ppm |
| 2015-06-23 | Q1523409005 | 0.327 ppm |
| 2015-06-23 | Q1523409006 | 0.0440 ppm |
| 2015-06-23 | Q1523409007 | 0.0735 ppm |
| 2015-06-23 | Q1523409008 | 0.102 ppm |
| 2015-06-23 | Q1523409009 | 0.0555 ppm |
| 2015-06-23 | Q1523409010 | 0.0365 ppm |
| 2015-06-23 | Q1523409011 | 0.0515 ppm |
| 2015-06-23 | Q1523409012 | 0.0430 ppm |