Nitrate and nitrite
Southern Utilities
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.
32
Samples
0
Samples exceeding legal limit (MCL)
2
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | 0.0208 ppm | 6 | 6 | 0.01000 ppm - 0.0385 ppm |
| 2015 | 0.0470 ppm | 25 | 24 | ND - 0.538 ppm |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | 0.0166 ppm | 1 | 1 | 0.0166 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 |
|---|---|---|
| 2014-06-30 | Q1424477004 | 0.0300 ppm |
| 2014-08-14 | Q1436466008 | 0.0120 ppm |
| 2014-08-26 | Q1439538030 | 0.0185 ppm |
| 2014-08-26 | Q1439538029 | 0.0155 ppm |
| 2014-10-02 | Q1450544036 | 0.01000 ppm |
| 2014-10-02 | Q1450544003 | 0.0385 ppm |
| 2015-01-22 | Q1502328029 | 0.0255 ppm |
| 2015-01-22 | Q1502328028 | 0.0225 ppm |
| 2015-01-22 | Q1502328027 | 0.0430 ppm |
| 2015-01-22 | Q1502328026 | 0.0390 ppm |
| 2015-01-22 | Q1502328025 | 0.0205 ppm |
| 2015-01-22 | Q1502328024 | 0.0270 ppm |
| 2015-01-22 | Q1502328023 | ND |
| 2015-03-16 | Q1509639002 | 0.0195 ppm |
| 2015-04-02 | Q1512260041 | 0.0225 ppm |
| 2015-04-02 | Q1512260042 | 0.0300 ppm |
| 2015-04-02 | Q1512260040 | 0.0135 ppm |
| 2015-04-02 | Q1512260039 | 0.0145 ppm |
| 2015-04-02 | Q1512260038 | 0.158 ppm |
| 2015-04-02 | Q1512260037 | 0.0165 ppm |
| 2015-04-02 | Q1512260036 | 0.0220 ppm |
| 2015-04-02 | Q1512260035 | 0.0215 ppm |
| 2015-04-02 | Q1512260034 | 0.0210 ppm |
| 2015-04-02 | Q1512260033 | 0.0140 ppm |
| 2015-04-30 | Q1515979029 | 0.0240 ppm |
| 2015-04-30 | Q1515979028 | 0.0205 ppm |
| 2015-04-30 | Q1515979027 | 0.538 ppm |
| 2015-04-30 | Q1515979026 | 0.0225 ppm |
| 2015-04-30 | Q1515979025 | 0.0130 ppm |
| 2015-04-30 | Q1515979024 | 0.0105 ppm |
| 2015-04-30 | Q1515979023 | 0.0165 ppm |
| 2019-02-21 | Q1907660022 | 0.0166 ppm |