Nitrate
Averydale Mutual Water Company
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 |
---|---|---|---|---|
2014 | 0.758 ppm | 7 | 7 | 0.474 ppm - 1.29 ppm |
2015 | 0.937 ppm | 4 | 4 | 0.497 ppm - 1.42 ppm |
2016 | 0.810 ppm | 4 | 4 | 0.430 ppm - 1.30 ppm |
2017 | 0.904 ppm | 5 | 5 | 0.460 ppm - 1.50 ppm |
2018 | 0.870 ppm | 5 | 5 | 0.450 ppm - 1.40 ppm |
2019 | 0.988 ppm | 4 | 4 | 0.450 ppm - 1.70 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 |
---|---|---|
2014-05-20 | 3761-006-1325 | 0.633 ppm |
2014-05-20 | 3761-004-1350 | 0.497 ppm |
2014-05-20 | 3761-003-1346 | 1.24 ppm |
2014-05-20 | 3761-001-1319 | 0.474 ppm |
2014-07-15 | 3761-006-1415 | 0.633 ppm |
2014-07-15 | 3761-003-1334 | 1.29 ppm |
2014-07-15 | 3761-001-1357 | 0.542 ppm |
2015-02-17 | 3761-004-1414 | 1.42 ppm |
2015-10-13 | 3761-001-1515 | 0.497 ppm |
2015-10-13 | 3761-003-1442 | 1.22 ppm |
2015-10-13 | 3761-006-1532 | 0.610 ppm |
2016-02-16 | 3761-004-1412 | 0.860 ppm |
2016-07-19 | 3761-001-1445 | 0.430 ppm |
2016-07-19 | 3761-006-1440 | 0.650 ppm |
2016-07-19 | 3761-003-1401 | 1.30 ppm |
2017-02-21 | 3761-004-1343 | 0.750 ppm |
2017-07-18 | 3761-004-1225 | 1.10 ppm |
2017-07-18 | 3761-006-1253 | 0.710 ppm |
2017-07-18 | 3761-003-1215 | 1.50 ppm |
2017-07-18 | 3761-001-1247 | 0.460 ppm |
2018-02-06 | 3761-004-1330 | 0.860 ppm |
2018-02-20 | 3761-004-1400 | 0.950 ppm |
2018-07-17 | 3761-006-1328 | 0.690 ppm |
2018-07-17 | 3761-003-1256 | 1.40 ppm |
2018-07-17 | 3761-001-1324 | 0.450 ppm |
2019-02-19 | 3761-004-1302 | 1.000 ppm |
2019-07-30 | 3761-003-1257 | 1.70 ppm |
2019-07-30 | 3761-001-1241 | 0.450 ppm |
2019-08-20 | 3761-006-1426 | 0.800 ppm |