Nitrate and nitrite
De Land
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.
17
Samples
0
Samples exceeding legal limit (MCL)
16
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.482 ppm | 1 | 1 | 0.482 ppm |
| 2015 | 0.749 ppm | 5 | 5 | 0.296 ppm - 1.22 ppm |
| 2016 | 0.677 ppm | 4 | 4 | 0.598 ppm - 0.839 ppm |
| 2017 | 0.701 ppm | 4 | 4 | 0.540 ppm - 0.835 ppm |
| 2018 | 0.300 ppm | 2 | 1 | ND - 0.600 ppm |
| 2019 | 0.270 ppm | 1 | 1 | 0.270 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 |
|---|---|---|
| 2014-03-24 | SC40634-01_01 | 0.482 ppm |
| 2015-03-09 | SC50172-01_01 | 1.22 ppm |
| 2015-03-17 | SC50369-01_01 | 0.296 ppm |
| 2015-05-05 | SE50109-01_01 | 0.584 ppm |
| 2015-08-10 | SH50465-01_01 | 0.752 ppm |
| 2015-12-14 | SL50442-01_01 | 0.892 ppm |
| 2016-02-02 | 16B0039-01_01 | 0.636 ppm |
| 2016-06-07 | 16F0284-01_01 | 0.635 ppm |
| 2016-09-13 | 16I0429-01_01 | 0.839 ppm |
| 2016-12-07 | 16L0170-01_01 | 0.598 ppm |
| 2017-03-07 | 17C0151-01_01 | 0.540 ppm |
| 2017-05-09 | 17E0349-01_01 | 0.776 ppm |
| 2017-09-12 | 17I0283-01_01 | 0.835 ppm |
| 2017-12-11 | 17L0229-01_01 | 0.654 ppm |
| 2018-03-07 | 18C0155-01_01 | 0.600 ppm |
| 2018-05-22 | 18E0894-01_02 | ND |
| 2019-02-13 | 19B0234-01 | 0.270 ppm |