Nitrate
Leray Town Water District 2 & 4
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 |
|---|---|---|---|---|
| 2014 | 0.373 ppm | 4 | 4 | 0.0650 ppm - 0.556 ppm |
| 2015 | 0.678 ppm | 4 | 4 | 0.0890 ppm - 0.969 ppm |
| 2016 | 0.655 ppm | 4 | 3 | ND - 1.10 ppm |
| 2017 | 0.612 ppm | 4 | 4 | 0.159 ppm - 0.927 ppm |
| 2018 | 1.02 ppm | 5 | 5 | 0.0750 ppm - 3.12 ppm |
| 2019 | 0.986 ppm | 10 | 10 | 0.327 ppm - 3.11 ppm |
ppm = parts per million
State and national drinking water standards and health guidelines
EWG Health Guideline 0.14 ppm
The EWG Health Guideline of 0.14 ppm for nitrate was defined by EWG . This health guideline protects against cancer and harm to fetal growth and development.
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 |
|---|---|---|
| 2014-06-30 | 01405605NIT | 0.342 ppm |
| 2014-06-30 | 01405606NIT | 0.556 ppm |
| 2014-06-30 | 01405604NIT | 0.527 ppm |
| 2014-06-30 | 01405607NIT | 0.0650 ppm |
| 2015-07-27 | 01506768NIT | 0.892 ppm |
| 2015-07-27 | 01506769NIT | 0.969 ppm |
| 2015-07-27 | 01506770NIT | 0.760 ppm |
| 2015-07-27 | 01506771NIT | 0.0890 ppm |
| 2016-08-10 | 01607446NIT | ND |
| 2016-08-10 | 01607448NIT | 1.10 ppm |
| 2016-08-10 | 01607445NIT | 0.680 ppm |
| 2016-08-10 | 01607447 | 0.840 ppm |
| 2017-06-15 | 01705422NIT | 0.544 ppm |
| 2017-06-15 | 01705423NIT | 0.816 ppm |
| 2017-06-15 | 0175424NIT | 0.927 ppm |
| 2017-06-15 | 01705425NIT | 0.159 ppm |
| 2018-06-26 | 01805893NIT | 0.743 ppm |
| 2018-06-26 | 01805895NIT | 3.12 ppm |
| 2018-06-26 | 01805897NIT | 0.498 ppm |
| 2018-06-26 | 01805894NIT | 0.0750 ppm |
| 2018-06-26 | 01805896NIT | 0.684 ppm |
| 2019-06-12 | 01905710NIT | 3.11 ppm |
| 2019-06-12 | 01905709NIT | 0.469 ppm |
| 2019-06-12 | 01905706NIT | 0.501 ppm |
| 2019-06-12 | L1925565-03NIT | 0.501 ppm |
| 2019-06-12 | L1925565-06NIT | 0.469 ppm |
| 2019-06-12 | L1925565-04NIT | 0.327 ppm |
| 2019-06-12 | 01905707NIT | 0.327 ppm |
| 2019-06-12 | L1925565-05NIT | 0.524 ppm |
| 2019-06-12 | L1925565-07NIT | 3.11 ppm |
| 2019-06-12 | 01905708NIT | 0.524 ppm |