Nitrate and nitrite
City of Edmond - Arcadia Lake
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.
292
Samples
0
Samples exceeding legal limit (MCL)
188
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.262 ppm | 50 | 9 | ND - 2.26 ppm |
| 2015 | 0.210 ppm | 50 | 8 | ND - 2.06 ppm |
| 2016 | 0.725 ppm | 49 | 49 | 0.242 ppm - 2.06 ppm |
| 2017 | 0.703 ppm | 48 | 48 | 0.280 ppm - 2.21 ppm |
| 2018 | 0.641 ppm | 48 | 48 | 0.290 ppm - 2.13 ppm |
| 2019 | 0.536 ppm | 47 | 26 | ND - 4.17 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 |
|---|---|---|
| 2014-10-27 | 1346776 | ND |
| 2014-10-27 | 1346777 | ND |
| 2014-10-27 | 1346778 | ND |
| 2014-10-27 | 1346779 | ND |
| 2014-10-27 | 1346780 | ND |
| 2014-10-27 | 1346781 | ND |
| 2014-10-28 | 1346782 | ND |
| 2014-10-28 | 1346783 | ND |
| 2014-10-28 | 1346784 | ND |
| 2014-10-28 | 1346785 | ND |
| 2014-10-28 | 1346796 | ND |
| 2014-10-28 | 1346797 | 1.08 ppm |
| 2014-10-28 | 1346798 | ND |
| 2014-10-28 | 1346799 | ND |
| 2014-10-28 | 1346800 | ND |
| 2014-10-28 | 1346801 | 1.10 ppm |
| 2014-10-28 | 1346802 | ND |
| 2014-10-28 | 1346803 | ND |
| 2014-10-29 | 1346786 | ND |
| 2014-10-29 | 1346787 | ND |
| 2014-10-29 | 1346788 | ND |
| 2014-10-29 | 1346789 | ND |
| 2014-10-29 | 1346790 | ND |
| 2014-10-29 | 1346791 | ND |
| 2014-10-29 | 1346792 | ND |
| 2014-10-29 | 1346793 | ND |
| 2014-10-29 | 1346794 | 1.80 ppm |
| 2014-10-29 | 1346795 | ND |
| 2014-10-29 | 1346804 | ND |
| 2014-10-29 | 1346806 | ND |
| 2014-10-30 | 1346768 | ND |
| 2014-10-30 | 1346769 | ND |
| 2014-10-30 | 1346770 | ND |
| 2014-10-30 | 1346771 | ND |
| 2014-10-30 | 1346772 | ND |
| 2014-10-30 | 1346773 | ND |
| 2014-10-30 | 1346807 | ND |
| 2014-10-30 | 1346808 | ND |
| 2014-10-30 | 1346809 | 1.36 ppm |
| 2014-10-30 | 1346810 | ND |
| 2014-10-30 | 1346811 | 1.98 ppm |
| 2014-10-30 | 1346812 | ND |
| 2014-10-30 | 1346813 | ND |
| 2014-10-30 | 1346814 | ND |
| 2014-10-30 | 1346815 | 2.26 ppm |
| 2014-10-31 | 1346774 | ND |
| 2014-10-31 | 1346775 | ND |
| 2014-11-26 | 1353738 | 1.15 ppm |
| 2014-11-26 | 1353743 | 1.30 ppm |
| 2014-11-26 | 1353744 | 1.05 ppm |
| 2015-03-30 | 1382834 | ND |
| 2015-04-27 | 1391937 | 1.02 ppm |
| 2015-04-27 | 1391938 | ND |
| 2015-04-27 | 1391939 | ND |
| 2015-04-27 | 1391940 | ND |
| 2015-04-27 | 1391941 | ND |
| 2015-04-27 | 1391942 | ND |
| 2015-04-27 | 1391943 | ND |
| 2015-04-27 | 1391944 | ND |
| 2015-04-27 | 1391945 | ND |
| 2015-04-27 | 1391946 | 1.000 ppm |
| 2015-04-28 | 1391947 | ND |
| 2015-04-28 | 1391948 | ND |
| 2015-04-28 | 1391949 | 1.09 ppm |
| 2015-04-28 | 1391950 | 1.16 ppm |
| 2015-04-28 | 1391951 | ND |
| 2015-04-28 | 1391952 | ND |
| 2015-04-28 | 1391953 | ND |
| 2015-04-28 | 1391954 | ND |
| 2015-04-28 | 1391955 | ND |
| 2015-04-28 | 1391956 | ND |
| 2015-04-28 | 1391957 | ND |
| 2015-04-28 | 1391958 | 2.06 ppm |
| 2015-04-29 | 1391959 | ND |
| 2015-04-29 | 1391960 | 1.03 ppm |
| 2015-04-29 | 1391961 | ND |
| 2015-04-29 | 1391962 | ND |
| 2015-04-29 | 1391963 | ND |
| 2015-04-29 | 1391964 | ND |
| 2015-04-29 | 1391965 | ND |
| 2015-04-29 | 1391966 | 1.34 ppm |
| 2015-04-29 | 1391967 | ND |
| 2015-04-29 | 1391968 | ND |
| 2015-04-29 | 1391980 | ND |
| 2015-04-29 | 1391981 | ND |
| 2015-04-29 | 1391982 | ND |
| 2015-04-30 | 1391969 | ND |
| 2015-04-30 | 1391970 | ND |
| 2015-04-30 | 1391971 | ND |
| 2015-04-30 | 1391972 | ND |
| 2015-04-30 | 1391973 | ND |
| 2015-04-30 | 1391974 | ND |
| 2015-04-30 | 1391975 | ND |
| 2015-04-30 | 1391976 | ND |
| 2015-04-30 | 1391977 | ND |
| 2015-04-30 | 1391978 | ND |
| 2015-06-18 | 1404161 | 1.78 ppm |
| 2015-06-18 | 1404169 | ND |
| 2015-06-18 | 1404170 | ND |
| 2015-06-25 | 1405945 | ND |
| 2016-04-04 | 1483207 | 1.37 ppm |
| 2016-04-04 | 1483208 | 1.21 ppm |
| 2016-04-04 | 1483209 | 1.73 ppm |
| 2016-04-05 | 1483210 | 1.24 ppm |
| 2016-04-05 | 1483211 | 0.257 ppm |
| 2016-04-05 | 1483212 | 0.314 ppm |
| 2016-04-05 | 1483213 | 0.540 ppm |
| 2016-04-05 | 1483214 | 1.04 ppm |
| 2016-04-05 | 1483215 | 0.242 ppm |
| 2016-04-05 | 1483216 | 0.252 ppm |
| 2016-04-06 | 1483217 | 0.267 ppm |
| 2016-04-06 | 1483218 | 0.395 ppm |
| 2016-04-06 | 1483219 | 0.438 ppm |
| 2016-04-06 | 1483220 | 0.588 ppm |
| 2016-04-07 | 1483221 | 0.616 ppm |
| 2016-04-07 | 1483222 | 1.19 ppm |
| 2016-04-07 | 1483223 | 0.480 ppm |
| 2016-04-07 | 1483224 | 0.298 ppm |
| 2016-04-07 | 1483225 | 0.459 ppm |
| 2016-04-11 | 1483226 | 2.06 ppm |
| 2016-04-11 | 1483227 | 0.762 ppm |
| 2016-04-11 | 1483228 | 0.298 ppm |
| 2016-04-11 | 1483229 | 0.995 ppm |
| 2016-04-12 | 1483230 | 1.08 ppm |
| 2016-04-12 | 1483231 | 0.972 ppm |
| 2016-04-12 | 1483232 | 0.968 ppm |
| 2016-04-13 | 1483233 | 1.01 ppm |
| 2016-04-13 | 1483234 | 0.950 ppm |
| 2016-04-13 | 1483235 | 0.880 ppm |
| 2016-04-13 | 1483236 | 0.863 ppm |
| 2016-04-14 | 1486818 | 0.649 ppm |
| 2016-04-14 | 1486819 | 0.560 ppm |
| 2016-04-14 | 1486835 | 0.552 ppm |
| 2016-04-18 | 1486820 | 0.301 ppm |
| 2016-04-18 | 1486821 | 0.326 ppm |
| 2016-04-18 | 1486822 | 0.367 ppm |
| 2016-04-18 | 1486823 | 1.04 ppm |
| 2016-04-20 | 1486825 | 0.316 ppm |
| 2016-04-20 | 1486826 | 0.916 ppm |
| 2016-04-25 | 1486827 | 1.70 ppm |
| 2016-04-25 | 1486828 | 0.367 ppm |
| 2016-04-25 | 1486829 | 0.410 ppm |
| 2016-04-25 | 1486831 | 0.574 ppm |
| 2016-04-26 | 1486832 | 0.914 ppm |
| 2016-04-27 | 1486833 | 0.407 ppm |
| 2016-04-28 | 1486830 | 0.516 ppm |
| 2016-04-28 | 1486834 | 0.827 ppm |
| 2016-04-28 | 1486836 | 0.543 ppm |
| 2016-07-28 | 1511290 | 0.470 ppm |
| 2017-03-06 | 7C06015-01 | 1.30 ppm |
| 2017-03-06 | 7C06015-02 | 0.570 ppm |
| 2017-03-06 | 7C06015-03 | 0.480 ppm |
| 2017-03-06 | 7C06015-04 | 2.21 ppm |
| 2017-03-06 | 7C06015-05 | 0.560 ppm |
| 2017-03-07 | 7C07059-01 | 1.11 ppm |
| 2017-03-07 | 7C07059-02 | 1.45 ppm |
| 2017-03-07 | 7C07059-03 | 0.720 ppm |
| 2017-03-07 | 7C07059-04 | 0.880 ppm |
| 2017-03-07 | 7C07059-05 | 1.06 ppm |
| 2017-03-08 | 7C08038-01 | 0.490 ppm |
| 2017-03-08 | 7C08038-02 | 0.500 ppm |
| 2017-03-08 | 7C08038-03 | 0.540 ppm |
| 2017-03-08 | 7C08038-04 | 0.830 ppm |
| 2017-03-08 | 7C08038-05 | 0.630 ppm |
| 2017-03-09 | 7C09018-01 | 0.940 ppm |
| 2017-03-09 | 7C09018-02 | 0.410 ppm |
| 2017-03-09 | 7C09018-03 | 0.500 ppm |
| 2017-03-09 | 7C09018-04 | 0.480 ppm |
| 2017-03-09 | 7C09018-05 | 0.590 ppm |
| 2017-03-10 | 7C10012-01 | 0.490 ppm |
| 2017-03-10 | 7C10012-02 | 0.420 ppm |
| 2017-03-10 | 7C10012-03 | 0.410 ppm |
| 2017-03-10 | 7C10012-04 | 0.440 ppm |
| 2017-03-10 | 7C10012-05 | 0.790 ppm |
| 2017-03-10 | 7C10012-06 | 0.430 ppm |
| 2017-03-13 | 7C13013-01 | 0.720 ppm |
| 2017-03-13 | 7C13013-02 | 0.828 ppm |
| 2017-03-13 | 7C13013-03 | 0.595 ppm |
| 2017-03-20 | 7C20037-01 | 0.460 ppm |
| 2017-03-20 | 7C20037-02 | 0.540 ppm |
| 2017-03-20 | 7C20037-03 | 0.670 ppm |
| 2017-03-20 | 7C20037-04 | 0.480 ppm |
| 2017-03-20 | 7C20037-05 | 0.360 ppm |
| 2017-03-20 | 7C20037-06 | 0.540 ppm |
| 2017-03-20 | 7C20037-07 | 0.620 ppm |
| 2017-03-20 | 7C20037-08 | 0.780 ppm |
| 2017-03-20 | 7C20037-09 | 0.930 ppm |
| 2017-03-20 | 7C20037-10 | 0.280 ppm |
| 2017-03-20 | 7C20037-11 | 0.320 ppm |
| 2017-03-20 | 7C20037-12 | 1.57 ppm |
| 2017-03-21 | 7C21038-01 | 0.650 ppm |
| 2017-03-21 | 7C21038-02 | 0.400 ppm |
| 2017-03-21 | 7C21038-03 | 0.490 ppm |
| 2017-03-21 | 7C21038-04 | 0.680 ppm |
| 2017-03-21 | 7C21038-05 | 0.510 ppm |
| 2017-04-14 | 7D14015-01 | 0.980 ppm |
| 2017-04-25 | 7D25019-01 | 1.11 ppm |
| 2018-07-30 | AG30042-01 | 0.390 ppm |
| 2018-07-30 | AG30042-02 | 0.390 ppm |
| 2018-07-30 | AG30042-03 | 0.290 ppm |
| 2018-07-30 | AG30042-04 | 0.540 ppm |
| 2018-07-30 | AG30042-05 | 0.620 ppm |
| 2018-07-30 | AG30042-06 | 0.400 ppm |
| 2018-07-30 | AG30042-07 | 1.26 ppm |
| 2018-07-30 | AG30042-08 | 0.480 ppm |
| 2018-07-30 | AG30042-09 | 1.08 ppm |
| 2018-07-30 | AG30042-10 | 0.540 ppm |
| 2018-07-30 | AG30042-11 | 0.330 ppm |
| 2018-07-30 | AG30042-12 | 0.340 ppm |
| 2018-07-30 | AG30042-13 | 0.320 ppm |
| 2018-07-30 | AG30042-14 | 0.290 ppm |
| 2018-07-30 | AG30042-15 | 0.310 ppm |
| 2018-07-30 | AG30042-16 | 0.820 ppm |
| 2018-07-30 | AG30042-17 | 0.320 ppm |
| 2018-07-30 | AG30042-18 | 1.57 ppm |
| 2018-07-30 | AG30042-19 | 0.390 ppm |
| 2018-07-30 | AG30042-20 | 1.72 ppm |
| 2018-07-30 | AG30042-21 | 1.11 ppm |
| 2018-07-30 | AG30042-22 | 0.310 ppm |
| 2018-07-30 | AG30042-23 | 0.550 ppm |
| 2018-07-30 | AG30042-24 | 0.590 ppm |
| 2018-07-30 | AG30042-25 | 0.460 ppm |
| 2018-07-30 | AG30042-26 | 0.770 ppm |
| 2018-07-30 | AG30042-27 | 0.300 ppm |
| 2018-07-30 | AG30042-28 | 0.610 ppm |
| 2018-07-30 | AG30042-29 | 0.560 ppm |
| 2018-07-31 | AG31041-01 | 0.780 ppm |
| 2018-07-31 | AG31041-02 | 0.590 ppm |
| 2018-07-31 | AG31041-03 | 2.13 ppm |
| 2018-07-31 | AG31041-04 | 0.400 ppm |
| 2018-07-31 | AG31041-05 | 0.450 ppm |
| 2018-07-31 | AG31041-06 | 0.320 ppm |
| 2018-07-31 | AG31041-07 | 0.940 ppm |
| 2018-07-31 | AG31041-08 | 0.350 ppm |
| 2018-07-31 | AG31041-09 | 0.400 ppm |
| 2018-07-31 | AG31041-10 | 0.310 ppm |
| 2018-07-31 | AG31041-11 | 0.480 ppm |
| 2018-07-31 | AG31041-12 | 0.330 ppm |
| 2018-07-31 | AG31041-13 | 0.840 ppm |
| 2018-07-31 | AG31041-14 | 1.03 ppm |
| 2018-07-31 | AG31041-15 | 1.000 ppm |
| 2018-07-31 | AG31041-16 | 0.660 ppm |
| 2018-07-31 | AG31041-17 | 0.530 ppm |
| 2018-07-31 | AG31041-18 | 0.820 ppm |
| 2018-10-16 | AJ16102-01 | 0.758 ppm |
| 2019-07-23 | 1803732 | 4.17 ppm |
| 2019-07-23 | 1803734 | ND |
| 2019-07-23 | 1803735 | 1.05 ppm |
| 2019-07-23 | 1803736 | ND |
| 2019-07-23 | 1803737 | ND |
| 2019-07-23 | 1803738 | ND |
| 2019-07-23 | 1803739 | ND |
| 2019-07-23 | 1803740 | ND |
| 2019-07-23 | 1803741 | ND |
| 2019-07-23 | 1803742 | ND |
| 2019-07-23 | 1803743 | ND |
| 2019-07-23 | 1803744 | ND |
| 2019-07-23 | 1803745 | ND |
| 2019-07-23 | 1803746 | ND |
| 2019-07-23 | 1803747 | ND |
| 2019-07-23 | 1803748 | ND |
| 2019-07-23 | 1803749 | ND |
| 2019-07-23 | 1803750 | 1.08 ppm |
| 2019-07-23 | 1803751 | 1.03 ppm |
| 2019-07-23 | 1803752 | 0.399 ppm |
| 2019-07-23 | 1803753 | 0.471 ppm |
| 2019-07-23 | 1803754 | ND |
| 2019-07-23 | 1803756 | ND |
| 2019-07-23 | 1803757 | ND |
| 2019-07-23 | 1803758 | 0.378 ppm |
| 2019-07-23 | 1803759 | ND |
| 2019-07-23 | 1803760 | 1.07 ppm |
| 2019-07-23 | 1803761 | ND |
| 2019-07-23 | 1803762 | 0.329 ppm |
| 2019-07-23 | 1803763 | 1.30 ppm |
| 2019-07-23 | 1803764 | 0.461 ppm |
| 2019-07-23 | 1803765 | 1.70 ppm |
| 2019-07-23 | 1803766 | 1.02 ppm |
| 2019-07-23 | 1803767 | 1.33 ppm |
| 2019-07-23 | 1803768 | 0.640 ppm |
| 2019-07-23 | 1803769 | 0.798 ppm |
| 2019-07-23 | 1803770 | 0.351 ppm |
| 2019-07-23 | 1803771 | 0.649 ppm |
| 2019-07-23 | 1803772 | 0.772 ppm |
| 2019-07-23 | 1803773 | 0.730 ppm |
| 2019-07-23 | 1803774 | ND |
| 2019-07-23 | 1803775 | 0.743 ppm |
| 2019-07-23 | 1803776 | 0.311 ppm |
| 2019-07-23 | 1803777 | 0.493 ppm |
| 2019-07-23 | 1803778 | 0.877 ppm |
| 2019-08-12 | 1810232 | 2.42 ppm |
| 2019-09-30 | 1824734 | 0.609 ppm |