Nitrate and nitrite
City of Grand Island
Nitrate and nitrite enter water from fertilizer runoff, septic tanks and urban runoff. These contaminants can cause oxygen deprivation for infants and increase the risk of cancer. Nitrite is significantly more toxic than nitrate. Click here to read more about nitrate.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | 3.45 ppm | 11 | 11 | 0.727 ppm - 6.02 ppm |
2015 | 2.60 ppm | 8 | 8 | 0.635 ppm - 5.90 ppm |
2016 | 2.26 ppm | 8 | 8 | 0.639 ppm - 5.23 ppm |
2017 | 2.07 ppm | 8 | 8 | 0.479 ppm - 4.78 ppm |
2018 | 2.11 ppm | 8 | 8 | 0.397 ppm - 5.10 ppm |
2019 | 1.95 ppm | 8 | 8 | 0.412 ppm - 5.00 ppm |
ppm = parts per million
State and national drinking water standards and health guidelines
EWG Health Guideline 0.14 ppm
The health guideline of 0.14 parts per million, or ppm, for nitrate and nitrite is based on the equivalent health guideline for nitrate, as defined in a peer-reviewed scientific study by EWG. This guideline represents a one-in-one-million annual cancer risk level.
EPA Maximum Contaminant
Level (MCL) 10 ppm
ppm = parts per million
All test results
Date | Lab ID | Result |
---|---|---|
2014-02-19 | 279274 | 1.41 ppm |
2014-02-19 | 279275 | 5.43 ppm |
2014-02-19 | 279276 | 0.894 ppm |
2014-02-19 | 279277 | 0.902 ppm |
2014-02-19 | 279278 | 0.727 ppm |
2014-02-19 | 279279 | 2.33 ppm |
2014-02-19 | 279280 | 4.48 ppm |
2014-04-08 | 293720 | 5.48 ppm |
2014-07-23 | 308509 | 6.02 ppm |
2014-09-02 | 308946 | 4.29 ppm |
2014-10-07 | 328038 | 5.98 ppm |
2015-01-06 | 343937 | 5.90 ppm |
2015-02-03 | 343931 | 2.45 ppm |
2015-02-03 | 343932 | 0.635 ppm |
2015-02-03 | 343933 | 1.40 ppm |
2015-02-03 | 343934 | 4.70 ppm |
2015-02-03 | 343935 | 0.792 ppm |
2015-02-03 | 343936 | 0.788 ppm |
2015-08-25 | 373863 | 4.11 ppm |
2016-02-15 | 5.23 ppm | |
2016-02-15 | 0.639 ppm | |
2016-02-15 | 1.03 ppm | |
2016-02-15 | 2.56 ppm | |
2016-02-15 | 0.704 ppm | |
2016-02-23 | 0.717 ppm | |
2016-08-17 | 3.57 ppm | |
2016-08-17 | 3.65 ppm | |
2017-02-14 | 0.514 ppm | |
2017-02-14 | 0.525 ppm | |
2017-02-14 | 0.479 ppm | |
2017-02-14 | 2.43 ppm | |
2017-02-14 | 4.78 ppm | |
2017-02-14 | 0.498 ppm | |
2017-08-29 | 3.59 ppm | |
2017-08-29 | 3.71 ppm | |
2018-02-28 | 530900 | 0.462 ppm |
2018-02-28 | 530899 | 0.453 ppm |
2018-02-28 | 530898 | 0.423 ppm |
2018-02-28 | 530897 | 2.00 ppm |
2018-02-28 | 530896 | 0.397 ppm |
2018-02-28 | 530895 | 5.10 ppm |
2018-08-28 | 562292 | 4.03 ppm |
2018-08-28 | 562293 | 4.02 ppm |
2019-02-11 | 590947 | 0.504 ppm |
2019-02-11 | 590948 | 0.483 ppm |
2019-02-11 | 590944 | 0.472 ppm |
2019-02-11 | 590943 | 1.86 ppm |
2019-02-19 | 590946 | 0.412 ppm |
2019-02-19 | 590945 | 5.00 ppm |
2019-08-27 | 617812 | 3.46 ppm |
2019-08-27 | 617811 | 3.42 ppm |