Nitrate
Leeds Water Board
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | 0.469 ppm | 7 | 7 | 0.150 ppm - 0.930 ppm |
2015 | 0.523 ppm | 7 | 7 | 0.210 ppm - 0.940 ppm |
2016 | N/A | 0 | 0 | N/A |
2017 | N/A | 0 | 0 | N/A |
2018 | 0.523 ppm | 7 | 7 | 0.260 ppm - 1.06 ppm |
2019 | 0.621 ppm | 8 | 8 | 0.210 ppm - 1.17 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 |
---|---|---|
2014-07-21 | 1407-00247-2N | 0.590 ppm |
2014-07-21 | 1407-00247-1N | 0.530 ppm |
2014-07-21 | 1407-00247-6N | 0.440 ppm |
2014-07-21 | 1407-00247-7N | 0.420 ppm |
2014-07-21 | 1407-00247-5N | 0.220 ppm |
2014-07-21 | 1407-00247-3N | 0.150 ppm |
2014-07-21 | 1407-00247-4N | 0.930 ppm |
2015-07-20 | 1507-00297-1 | 0.620 ppm |
2015-07-20 | 1507-00297-2 | 0.210 ppm |
2015-07-20 | 1507-00297-5 | 0.250 ppm |
2015-07-20 | 1507-00297-4 | 0.440 ppm |
2015-07-20 | 1507-00297-6 | 0.700 ppm |
2015-07-20 | 1507-00297-3 | 0.940 ppm |
2015-08-17 | 1508-00190-1 | 0.500 ppm |
2018-07-16 | 1807-00242-004 | 1.06 ppm |
2018-07-16 | 1807-00242-001 | 0.260 ppm |
2018-07-16 | 1807-00242-005 | 0.290 ppm |
2018-07-16 | 1807-00242-003 | 0.310 ppm |
2018-07-16 | 1807-00242-006 | 0.510 ppm |
2018-07-16 | 1807-00242-002 | 0.570 ppm |
2018-07-16 | 1807-00242-007 | 0.660 ppm |
2019-07-17 | 1907-00242-003 | 1.17 ppm |
2019-07-17 | 1907-00242-010 | 1.06 ppm |
2019-07-17 | 1907-00242-005 | 0.670 ppm |
2019-07-17 | 1907-00242-001 | 0.560 ppm |
2019-07-17 | 1907-00242-004 | 0.420 ppm |
2019-07-17 | 1907-00242-007 | 0.250 ppm |
2019-07-17 | 1907-00242-002 | 0.210 ppm |
2019-07-31 | 1907-00423-001 | 0.630 ppm |