Nitrate and nitrite
City of Olive Branch
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.
43
Samples
0
Samples exceeding legal limit (MCL)
35
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 | 0.446 ppm | 8 | 7 | ND - 0.760 ppm |
| 2015 | 0.421 ppm | 7 | 6 | ND - 0.760 ppm |
| 2016 | 0.481 ppm | 7 | 6 | ND - 0.830 ppm |
| 2017 | 0.440 ppm | 7 | 5 | ND - 0.830 ppm |
| 2018 | 0.543 ppm | 7 | 6 | ND - 0.950 ppm |
| 2019 | 0.444 ppm | 7 | 6 | ND - 0.810 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 |
|---|---|---|
| 2014-01-29 | 140130-028NI | 0.390 ppm |
| 2014-01-29 | 140130-023NI | 0.620 ppm |
| 2014-01-29 | 140130-022NI | 0.760 ppm |
| 2014-01-29 | 140130-013NI | 0.300 ppm |
| 2014-01-29 | 140130-011NI | 0.720 ppm |
| 2014-01-29 | 140130-009NI | 0.530 ppm |
| 2014-01-29 | 140130-008NI | ND |
| 2014-01-29 | 140130-007NI | 0.250 ppm |
| 2015-01-26 | 150127-077NI | 0.760 ppm |
| 2015-01-26 | 150127-059NI | 0.1000 ppm |
| 2015-01-26 | 150127-067NI | 0.550 ppm |
| 2015-01-26 | 150127-068NI | 0.520 ppm |
| 2015-01-26 | 150127-069NI | 0.650 ppm |
| 2015-01-26 | 150127-078NI | 0.370 ppm |
| 2015-01-26 | 150127-079NI | ND |
| 2016-03-22 | 160323-038NI | 0.580 ppm |
| 2016-03-22 | 160323-048NI | 0.160 ppm |
| 2016-03-22 | 160323-047NI | ND |
| 2016-03-22 | 160323-046NI | 0.540 ppm |
| 2016-03-22 | 160323-045NI | 0.550 ppm |
| 2016-03-22 | 160323-044NI | 0.710 ppm |
| 2016-03-22 | 160323-043NI | 0.830 ppm |
| 2017-02-07 | 170208-028NI | 0.680 ppm |
| 2017-02-07 | 170208-017NI | 0.530 ppm |
| 2017-02-07 | 170208-014NI | ND |
| 2017-02-07 | 170208-011NI | 0.550 ppm |
| 2017-02-07 | 170208-008NI | 0.830 ppm |
| 2017-02-07 | 170208-005NI | ND |
| 2017-02-07 | 170208-004NI | 0.490 ppm |
| 2018-01-29 | 180130-071NI | 0.350 ppm |
| 2018-01-29 | 180130-065NI | 0.580 ppm |
| 2018-01-29 | 180130-066NI | 0.710 ppm |
| 2018-01-29 | 180130-067NI | 0.620 ppm |
| 2018-01-29 | 180130-069NI | 0.590 ppm |
| 2018-01-29 | 180130-072NI | ND |
| 2018-01-29 | 180130-077NI | 0.950 ppm |
| 2019-02-05 | 190206-018NI | 0.810 ppm |
| 2019-02-05 | 190206-029NI | 0.420 ppm |
| 2019-02-05 | 190206-028NI | 0.170 ppm |
| 2019-02-05 | 190206-023NI | 0.610 ppm |
| 2019-02-05 | 190206-022NI | ND |
| 2019-02-05 | 190206-021NI | 0.690 ppm |
| 2019-02-05 | 190206-019NI | 0.410 ppm |