Nitrate
Northcrest Addition
Nitrate, a fertilizer chemical, frequently contaminates drinking water due to agricultural and urban runoff, and discharges from municipal wastewater treatment plants and septic tanks. Excessive nitrate in water can cause oxygen deprivation in infants and increase the risk of cancer. Click here to read more about nitrate.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | 0.0597 ppm | 2 | 2 | 0.0534 ppm - 0.0660 ppm |
| 2019 | 0.0630 ppm | 2 | 2 | 0.0531 ppm - 0.0728 ppm |
| 2020 | 0.0676 ppm | 2 | 2 | 0.0636 ppm - 0.0715 ppm |
| 2021 | 0.0574 ppm | 2 | 2 | 0.0558 ppm - 0.0590 ppm |
| 2022 | 0.103 ppm | 2 | 2 | 0.0615 ppm - 0.144 ppm |
| 2023 | 0.0600 ppm | 2 | 2 | 0.0501 ppm - 0.0698 ppm |
ppm = parts per million
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 0.14 ppm
The EWG 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
The legal limit for nitrate, established in 1962, was developed to protect infants from acute methemoglobinemia, a life-threatening disorder of oxygen transport in the body. This limit does not fully protect against the risk of cancer and harm to the developing fetus.
ppm = parts per million
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-09-11 | Q1836165006 | 0.0534 ppm |
| 2018-09-11 | Q1836165011 | 0.0660 ppm |
| 2019-10-21 | Q1973080008 | 0.0728 ppm |
| 2019-10-21 | Q1973080009 | 0.0531 ppm |
| 2020-10-13 | Q2040353007 | 0.0636 ppm |
| 2020-10-13 | Q2040353008 | 0.0715 ppm |
| 2021-10-07 | Q2127873010 | 0.0590 ppm |
| 2021-10-07 | Q2127873015 | 0.0558 ppm |
| 2022-10-17 | Q2231506001 | 0.144 ppm |
| 2022-10-17 | Q2231506005 | 0.0615 ppm |
| 2023-05-22 | Q2319066007 | 0.0501 ppm |
| 2023-05-22 | Q2319066008 | 0.0698 ppm |