Nitrate
Bi County WSC 1
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 | 0.0378 ppm | 11 | 11 | 0.0190 ppm - 0.0975 ppm |
| 2015 | 0.0628 ppm | 11 | 11 | 0.0325 ppm - 0.130 ppm |
| 2016 | 0.0586 ppm | 11 | 11 | 0.0375 ppm - 0.139 ppm |
| 2017 | 0.0578 ppm | 11 | 11 | 0.0353 ppm - 0.132 ppm |
| 2018 | 0.0680 ppm | 11 | 11 | 0.0369 ppm - 0.152 ppm |
| 2019 | 0.0543 ppm | 12 | 12 | 0.0202 ppm - 0.139 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 |
|---|---|---|
| 2014-01-23 | Q1402181045 | 0.0205 ppm |
| 2014-01-23 | Q1402181044 | 0.0250 ppm |
| 2014-01-23 | Q1402181043 | 0.0665 ppm |
| 2014-01-23 | Q1402181042 | 0.0975 ppm |
| 2014-01-23 | Q1402181041 | 0.0415 ppm |
| 2014-01-23 | Q1402181040 | 0.0395 ppm |
| 2014-01-23 | Q1402181039 | 0.0220 ppm |
| 2014-01-23 | Q1402181038 | 0.0310 ppm |
| 2014-01-23 | Q1402181037 | 0.0245 ppm |
| 2014-01-23 | Q1402181036 | 0.0285 ppm |
| 2014-01-23 | Q1402181035 | 0.0190 ppm |
| 2015-02-05 | Q1504623015 | 0.0805 ppm |
| 2015-02-05 | Q1504623014 | 0.130 ppm |
| 2015-02-05 | Q1504623016 | 0.0485 ppm |
| 2015-02-05 | Q1504623017 | 0.0360 ppm |
| 2015-02-05 | Q1504623019 | 0.0620 ppm |
| 2015-02-05 | Q1504623020 | 0.0880 ppm |
| 2015-02-05 | Q1504623018 | 0.0515 ppm |
| 2015-04-16 | Q1514410016 | 0.0575 ppm |
| 2015-04-16 | Q1514410015 | 0.0325 ppm |
| 2015-04-16 | Q1514410014 | 0.0640 ppm |
| 2015-04-16 | Q1514410013 | 0.0400 ppm |
| 2016-04-19 | Q1615295016 | 0.139 ppm |
| 2016-04-19 | Q1615295014 | 0.0420 ppm |
| 2016-04-19 | Q1615295015 | 0.0625 ppm |
| 2016-04-19 | Q1615295001 | 0.0820 ppm |
| 2016-10-06 | Q1642553025 | 0.0440 ppm |
| 2016-10-06 | Q1642553024 | 0.0400 ppm |
| 2016-10-06 | Q1642553023 | 0.0590 ppm |
| 2016-10-06 | Q1642553022 | 0.0375 ppm |
| 2016-10-06 | Q1642553021 | 0.0565 ppm |
| 2016-10-06 | Q1642553020 | 0.0400 ppm |
| 2016-10-06 | Q1642553019 | 0.0425 ppm |
| 2017-01-05 | Q1700559017 | 0.0451 ppm |
| 2017-01-05 | Q1700559007 | 0.0353 ppm |
| 2017-01-05 | Q1700559029 | 0.0888 ppm |
| 2017-01-05 | Q1700559006 | 0.132 ppm |
| 2017-03-29 | Q1713282042 | 0.0431 ppm |
| 2017-03-29 | Q1713282041 | 0.0575 ppm |
| 2017-03-29 | Q1713282040 | 0.0374 ppm |
| 2017-03-29 | Q1713282039 | 0.0477 ppm |
| 2017-03-29 | Q1713282013 | 0.0442 ppm |
| 2017-10-02 | Q1748547016 | 0.0541 ppm |
| 2017-10-02 | Q1748547002 | 0.0511 ppm |
| 2018-01-09 | Q1800903044 | 0.0550 ppm |
| 2018-01-09 | Q1800903039 | 0.152 ppm |
| 2018-01-09 | Q1800903040 | 0.1000 ppm |
| 2018-01-09 | Q1800903041 | 0.0605 ppm |
| 2018-01-09 | Q1800903042 | 0.0560 ppm |
| 2018-01-09 | Q1800903043 | 0.0371 ppm |
| 2018-01-09 | Q1800903045 | 0.0369 ppm |
| 2018-01-09 | Q1800903046 | 0.0690 ppm |
| 2018-01-09 | Q1800903047 | 0.0565 ppm |
| 2018-01-09 | Q1800903048 | 0.0635 ppm |
| 2018-01-09 | Q1800903049 | 0.0610 ppm |
| 2019-01-15 | Q1902083001 | 0.0860 ppm |
| 2019-01-15 | Q1902083026 | 0.0548 ppm |
| 2019-01-15 | Q1902083027 | 0.0377 ppm |
| 2019-01-15 | Q1902083028 | 0.0556 ppm |
| 2019-01-15 | Q1902083029 | 0.0528 ppm |
| 2019-01-15 | Q1902083030 | 0.139 ppm |
| 2019-01-15 | Q1902083031 | 0.0202 ppm |
| 2019-01-15 | Q1902083032 | 0.0378 ppm |
| 2019-01-29 | Q1904181002 | 0.0418 ppm |
| 2019-01-29 | Q1904181001 | 0.0483 ppm |
| 2019-01-29 | Q1904181009 | 0.0470 ppm |
| 2019-06-11 | Q1934121008 | 0.0302 ppm |