Nitrate and nitrite
Ottawa Village
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.
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 | 1.39 ppm | 12 | 12 | 0.520 ppm - 2.79 ppm |
| 2019 | 2.07 ppm | 12 | 12 | 0.990 ppm - 3.50 ppm |
| 2020 | 1.36 ppm | 12 | 12 | 0.450 ppm - 2.56 ppm |
| 2021 | 1.54 ppm | 12 | 12 | 0.810 ppm - 2.42 ppm |
| 2022 | 1.63 ppm | 12 | 12 | 0.280 ppm - 3.31 ppm |
| 2023 | 1.33 ppm | 12 | 11 | ND - 2.83 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
ppm = parts per million
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-01-09 | 18-10576-01 | 1.67 ppm |
| 2018-02-20 | 18-13077-03 | 2.79 ppm |
| 2018-03-06 | 18-13972-03 | 2.04 ppm |
| 2018-04-03 | 18-15930-01A | 2.00 ppm |
| 2018-05-01 | 18-18000-01A | 1.96 ppm |
| 2018-06-05 | 18-20803-02A | 0.670 ppm |
| 2018-07-02 | 18-23292-01A | 1.52 ppm |
| 2018-08-07 | 18-26486-01A | 0.690 ppm |
| 2018-09-04 | 18-28934-01 | 0.520 ppm |
| 2018-10-02 | 18-31488-01A | 0.580 ppm |
| 2018-11-06 | 18-34298-01A | 0.860 ppm |
| 2018-12-04 | 18-36222-01A | 1.35 ppm |
| 2019-01-02 | 19-10102-01A | 2.47 ppm |
| 2019-02-05 | 19-12377-01 | 3.14 ppm |
| 2019-03-05 | 19-14266-01A | 3.02 ppm |
| 2019-04-02 | 19-16527-01A | 3.50 ppm |
| 2019-05-07 | 19-19134-01A | 2.52 ppm |
| 2019-06-04 | 19-21247-01A | 1.71 ppm |
| 2019-07-02 | 19-23967-01A | 1.95 ppm |
| 2019-08-06 | 19-26892-01A | 1.000 ppm |
| 2019-09-03 | 19-29398-01A | 1.10 ppm |
| 2019-10-01 | 19-31999-01A | 0.990 ppm |
| 2019-11-05 | 19-34867-01A | 1.30 ppm |
| 2019-12-03 | 19-36868-01A | 2.16 ppm |
| 2020-01-07 | 20-10402-01A | 2.01 ppm |
| 2020-02-04 | 20-12513-01A | 1.86 ppm |
| 2020-03-03 | 20-14703-01A | 2.56 ppm |
| 2020-04-07 | 20-17303-01A | 1.71 ppm |
| 2020-05-05 | 20-19244-01A | 1.82 ppm |
| 2020-06-02 | 20-21577-01A | 1.55 ppm |
| 2020-07-07 | 20-24777-01A | 1.16 ppm |
| 2020-08-04 | 20-27314-01A | 0.790 ppm |
| 2020-09-01 | 20-29949-01A | 0.450 ppm |
| 2020-10-06 | 20-33252-01A | 1.19 ppm |
| 2020-11-03 | 20-35549-01A | 0.520 ppm |
| 2020-12-01 | 20-37526-01A | 0.640 ppm |
| 2021-01-05 | 21-10285-01A | 1.77 ppm |
| 2021-02-02 | 21-12290-01A | 1.97 ppm |
| 2021-03-02 | 21-14331-01A | 2.42 ppm |
| 2021-04-06 | 21-17065-01A | 1.72 ppm |
| 2021-05-04 | 21-19202-01A | 1.43 ppm |
| 2021-06-01 | 21-21727-01A | 1.11 ppm |
| 2021-07-06 | 21-24918-01A | 2.06 ppm |
| 2021-08-03 | 21-27763-01A | 1.55 ppm |
| 2021-09-07 | 21-31178-01A | 0.810 ppm |
| 2021-10-05 | 21-33880-01 | 0.960 ppm |
| 2021-11-02 | 21-36390-01A | 1.14 ppm |
| 2021-12-07 | 21-39127-01A | 1.55 ppm |
| 2022-01-04 | 22-10226-01A | 1.02 ppm |
| 2022-02-01 | M22-12430-01A | 3.31 ppm |
| 2022-03-01 | 22-14777-01A | 2.98 ppm |
| 2022-04-05 | 22-17911-01A | 2.55 ppm |
| 2022-05-03 | 22-20710-01A | 1.86 ppm |
| 2022-06-07 | 22-24082-01A | 0.280 ppm |
| 2022-07-05 | 22-26847-01A | 1.82 ppm |
| 2022-08-02 | 22-29969-01A | 0.350 ppm |
| 2022-09-06 | 2200269-01A | 1.02 ppm |
| 2022-10-04 | 2203147-01A | 1.22 ppm |
| 2022-11-01 | 2206062-01A | 1.62 ppm |
| 2022-12-06 | 2209526-01A | 1.54 ppm |
| 2023-01-03 | 2300231-03A | 1.81 ppm |
| 2023-02-07 | 2304238-01A | 1.36 ppm |
| 2023-03-07 | 2307839-01A | 1.52 ppm |
| 2023-04-04 | 2311272-01A | 2.83 ppm |
| 2023-05-02 | 2314716-01B | 1.99 ppm |
| 2023-06-06 | 2319435-01A | 2.25 ppm |
| 2023-07-05 | 2323855-01A | ND |
| 2023-08-01 | 2327728-01A | 0.260 ppm |
| 2023-09-05 | 2332820-01A | 0.580 ppm |
| 2023-10-03 | 2337042-01A | 1.33 ppm |
| 2023-11-07 | 2341709-01A | 1.16 ppm |
| 2023-12-05 | 2344906-01A | 0.860 ppm |