Nitrate
Liberty City Water Supply Corporation
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 | 0.0565 ppm | 4 | 4 | 0.0395 ppm - 0.0770 ppm |
| 2015 | 0.0649 ppm | 4 | 4 | 0.0440 ppm - 0.0915 ppm |
| 2016 | 0.0674 ppm | 4 | 4 | 0.0445 ppm - 0.1000 ppm |
| 2017 | 0.119 ppm | 4 | 4 | 0.0815 ppm - 0.159 ppm |
| 2018 | 0.0551 ppm | 4 | 4 | 0.0415 ppm - 0.0686 ppm |
| 2019 | 0.0507 ppm | 4 | 4 | 0.0377 ppm - 0.0682 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 |
|---|---|---|
| 2014-06-16 | Q1421358004 | 0.0685 ppm |
| 2014-06-30 | Q1424517007 | 0.0395 ppm |
| 2014-06-30 | Q1424517006 | 0.0770 ppm |
| 2014-06-30 | Q1424517005 | 0.0410 ppm |
| 2015-04-14 | Q1513785006 | 0.0795 ppm |
| 2015-04-14 | Q1513785005 | 0.0445 ppm |
| 2015-04-14 | Q1513785004 | 0.0915 ppm |
| 2015-05-05 | Q1516377004 | 0.0440 ppm |
| 2016-05-12 | Q1619065016 | 0.1000 ppm |
| 2016-05-12 | Q1619065019 | 0.0445 ppm |
| 2016-05-12 | Q1619065018 | 0.0700 ppm |
| 2016-05-12 | Q1619065017 | 0.0550 ppm |
| 2017-03-28 | Q1712865009 | 0.0815 ppm |
| 2017-03-28 | Q1712865026 | 0.126 ppm |
| 2017-03-28 | Q1712865008 | 0.108 ppm |
| 2017-03-28 | Q1712865025 | 0.159 ppm |
| 2018-06-14 | Q1823909017 | 0.0467 ppm |
| 2018-06-14 | Q1823909004 | 0.0686 ppm |
| 2018-06-14 | Q1823909016 | 0.0415 ppm |
| 2018-06-14 | Q1823909003 | 0.0635 ppm |
| 2019-03-28 | Q1912649006 | 0.0682 ppm |
| 2019-03-28 | Q1912649018 | 0.0377 ppm |
| 2019-03-28 | Q1912649017 | 0.0550 ppm |
| 2019-03-28 | Q1912649016 | 0.0419 ppm |