Nitrate
Saint Francis Village
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 | 0.0572 ppm | 4 | 4 | 0.0295 ppm - 0.0963 ppm |
| 2019 | 0.0499 ppm | 4 | 4 | 0.0250 ppm - 0.0654 ppm |
| 2020 | 0.0288 ppm | 4 | 4 | 0.0111 ppm - 0.0420 ppm |
| 2021 | 0.0342 ppm | 4 | 4 | 0.0272 ppm - 0.0536 ppm |
| 2022 | 0.0512 ppm | 4 | 4 | 0.0385 ppm - 0.0695 ppm |
| 2023 | 0.0431 ppm | 4 | 3 | ND - 0.0911 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 |
|---|---|---|
| 2018-07-19 | Q1828773010 | 0.0568 ppm |
| 2018-07-19 | Q1828773011 | 0.0963 ppm |
| 2018-07-19 | Q1828773012 | 0.0295 ppm |
| 2018-07-19 | Q1828773009 | 0.0460 ppm |
| 2019-03-20 | Q1911627001 | 0.0521 ppm |
| 2019-03-20 | Q1911627002 | 0.0569 ppm |
| 2019-03-20 | Q1911627003 | 0.0654 ppm |
| 2019-03-20 | Q1911627004 | 0.0250 ppm |
| 2020-07-20 | Q2028181010 | 0.0404 ppm |
| 2020-07-20 | Q2028181011 | 0.0111 ppm |
| 2020-07-20 | Q2028181012 | 0.0420 ppm |
| 2020-07-20 | Q2028181013 | 0.0215 ppm |
| 2021-03-23 | Q2107415010 | 0.0272 ppm |
| 2021-03-23 | Q2107415013 | 0.0536 ppm |
| 2021-03-23 | Q2107415012 | 0.0277 ppm |
| 2021-03-23 | Q2107415011 | 0.0283 ppm |
| 2022-05-26 | Q2215264002 | 0.0462 ppm |
| 2022-05-26 | Q2215264019 | 0.0695 ppm |
| 2022-05-26 | Q2215264020 | 0.0385 ppm |
| 2022-05-26 | Q2215264022 | 0.0504 ppm |
| 2023-03-20 | Q2310438010 | 0.0911 ppm |
| 2023-03-20 | Q2310438011 | ND |
| 2023-03-20 | Q2310438012 | 0.0681 ppm |
| 2023-03-20 | Q2310438013 | 0.0131 ppm |