Nitrate
City of Wasco
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 | 7.45 ppm | 36 | 36 | 4.29 ppm - 9.49 ppm |
2015 | 8.06 ppm | 41 | 41 | 4.60 ppm - 10.00 ppm |
2016 | 8.11 ppm | 66 | 66 | 4.60 ppm - 13.0 ppm |
2017 | 7.09 ppm | 63 | 63 | 2.40 ppm - 11.0 ppm |
2018 | 7.13 ppm | 52 | 52 | 3.80 ppm - 14.0 ppm |
2019 | 6.12 ppm | 61 | 61 | 3.30 ppm - 11.0 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 |
---|---|---|
2014-02-04 | 5806-003-0835 | 8.58 ppm |
2014-03-04 | 5806-003-0845 | 9.04 ppm |
2014-03-04 | 5806-005-1012 | 7.23 ppm |
2014-03-04 | 5806-006-1022 | 8.58 ppm |
2014-03-04 | 5806-008-0830 | 6.55 ppm |
2014-03-06 | 5806-017-0955 | 6.78 ppm |
2014-04-08 | 5806-003-0842 | 8.81 ppm |
2014-04-30 | 5806-009-0735 | 7.45 ppm |
2014-05-01 | 5806-009-0738 | 6.55 ppm |
2014-05-06 | 5806-003-0852 | 9.04 ppm |
2014-06-04 | 5806-003-0803 | 8.81 ppm |
2014-06-04 | 5806-005-0833 | 5.65 ppm |
2014-06-04 | 5806-006-1009 | 8.58 ppm |
2014-06-04 | 5806-008-1037 | 9.49 ppm |
2014-06-04 | 5806-009-0849 | 4.52 ppm |
2014-06-04 | 5806-017-0823 | 4.97 ppm |
2014-07-01 | 5806-003-0800 | 8.58 ppm |
2014-07-01 | 5806-008-0833 | 6.78 ppm |
2014-08-05 | 5806-003-0832 | 9.26 ppm |
2014-08-05 | 5806-008-0855 | 7.68 ppm |
2014-09-02 | 5806-003-0815 | 9.04 ppm |
2014-09-02 | 5806-005-0833 | 6.10 ppm |
2014-09-02 | 5806-008-0843 | 7.45 ppm |
2014-09-02 | 5806-009-0900 | 4.29 ppm |
2014-09-09 | 5806-017-0840 | 5.20 ppm |
2014-09-18 | 5806-006-0930 | 7.00 ppm |
2014-10-08 | 5806-003-1006 | 8.81 ppm |
2014-10-08 | 5806-008-1029 | 7.23 ppm |
2014-11-04 | 5806-003-0841 | 8.81 ppm |
2014-11-04 | 5806-008-0850 | 7.00 ppm |
2014-12-01 | 5806-003-0942 | 8.58 ppm |
2014-12-01 | 5806-008-0959 | 6.10 ppm |
2014-12-04 | 5806-009-1030 | 8.81 ppm |
2014-12-04 | 5806-017-1010 | 6.78 ppm |
2014-12-05 | 5806-006-0836 | 6.78 ppm |
2014-12-10 | 5806-005-1341 | 7.23 ppm |
2015-01-06 | 5806-003-0825 | 8.36 ppm |
2015-01-06 | 5806-008-0835 | 6.33 ppm |
2015-02-03 | 5806-003-0831 | 8.81 ppm |
2015-02-03 | 5806-008-0841 | 6.55 ppm |
2015-03-03 | 5806-003-0849 | 9.04 ppm |
2015-03-03 | 5806-008-0943 | 6.55 ppm |
2015-03-11 | 5806-006-1200 | 8.58 ppm |
2015-03-11 | 5806-009-1143 | 9.04 ppm |
2015-03-12 | 5806-005-0832 | 6.78 ppm |
2015-03-17 | 5806-017-0843 | 6.55 ppm |
2015-04-06 | 5806-003-0802 | 9.04 ppm |
2015-04-10 | 5806-008-0757 | 9.94 ppm |
2015-04-10 | 5806-009-0808 | 8.58 ppm |
2015-05-05 | 5806-003-0853 | 8.81 ppm |
2015-05-07 | 5806-008-0747 | 7.45 ppm |
2015-06-04 | 5806-003-0835 | 8.58 ppm |
2015-06-04 | 5806-008-0943 | 8.36 ppm |
2015-06-04 | 5806-009-0927 | 7.91 ppm |
2015-06-09 | 5806-017-0830 | 6.55 ppm |
2015-06-11 | 5806-005-0828 | 6.78 ppm |
2015-06-29 | 5806-006-1311 | 7.91 ppm |
2015-07-07 | 5806-003-0858 | 8.81 ppm |
2015-07-16 | 5806-008-0945 | 9.94 ppm |
2015-08-04 | 5806-003-0823 | 8.80 ppm |
2015-09-01 | 5806-003-0816 | 8.90 ppm |
2015-09-01 | 5806-009-0831 | 4.60 ppm |
2015-09-01 | 5806-017-0848 | 5.70 ppm |
2015-09-03 | 5806-005-0820 | 6.90 ppm |
2015-09-15 | 5806-008-0937 | 10.00 ppm |
2015-09-17 | 5806-006-1005 | 7.40 ppm |
2015-09-17 | 5806-008-0948 | 9.60 ppm |
2015-10-01 | 5806-003-0928 | 9.20 ppm |
2015-10-01 | 5806-008-0945 | 9.60 ppm |
2015-11-03 | 5806-003-0808 | 9.00 ppm |
2015-11-03 | 5806-008-0818 | 8.00 ppm |
2015-12-01 | 5806-003-0833 | 9.20 ppm |
2015-12-01 | 5806-006-1115 | 7.50 ppm |
2015-12-01 | 5806-008-0846 | 7.70 ppm |
2015-12-01 | 5806-009-1102 | 8.70 ppm |
2015-12-03 | 5806-005-0933 | 7.50 ppm |
2015-12-03 | 5806-017-1030 | 6.90 ppm |
2016-01-04 | 5806-003-0939 | 9.00 ppm |
2016-01-04 | 5806-008-0953 | 7.40 ppm |
2016-02-01 | 5806-003-1108 | 9.10 ppm |
2016-02-01 | 5806-008-1121 | 6.80 ppm |
2016-02-09 | 5806-009-0828 | 8.90 ppm |
2016-02-10 | 5806-009-0854 | 7.40 ppm |
2016-03-01 | 5806-003-0818 | 8.90 ppm |
2016-03-01 | 5806-008-0835 | 7.00 ppm |
2016-03-01 | 5806-009-1047 | 12.0 ppm |
2016-03-03 | 5806-017-0828 | 6.60 ppm |
2016-04-05 | 5806-003-0820 | 9.20 ppm |
2016-04-05 | 5806-008-0830 | 8.00 ppm |
2016-05-03 | 5806-003-0826 | 8.90 ppm |
2016-05-10 | 5806-008-0828 | 7.50 ppm |
2016-05-12 | 5806-005-0825 | 6.30 ppm |
2016-05-23 | 5806-009-0826 | 8.00 ppm |
2016-05-24 | 5806-009-0830 | 7.50 ppm |
2016-05-25 | 5806-009-0836 | 6.90 ppm |
2016-06-02 | 5806-003-0820 | 9.30 ppm |
2016-06-02 | 5806-008-1001 | 9.30 ppm |
2016-06-02 | 5806-009-0836 | 6.00 ppm |
2016-06-02 | 5806-017-1018 | 5.90 ppm |
2016-06-09 | 5806-005-0958 | 7.40 ppm |
2016-07-07 | 5806-003-0844 | 9.20 ppm |
2016-07-07 | 5806-008-1009 | 8.00 ppm |
2016-07-07 | 5806-009-0933 | 5.10 ppm |
2016-07-21 | 5806-006-0828 | 6.70 ppm |
2016-08-02 | 5806-003-0839 | 8.90 ppm |
2016-08-02 | 5806-005-1037 | 7.40 ppm |
2016-08-02 | 5806-006-0714 | 6.70 ppm |
2016-08-02 | 5806-008-0951 | 7.60 ppm |
2016-08-02 | 5806-009-0938 | 4.60 ppm |
2016-08-02 | 5806-017-1021 | 6.90 ppm |
2016-08-04 | 5806-003-0640 | 9.10 ppm |
2016-08-04 | 5806-008-0655 | 8.80 ppm |
2016-08-04 | 5806-009-0647 | 4.70 ppm |
2016-09-01 | 5806-003-0752 | 9.00 ppm |
2016-09-01 | 5806-005-0952 | 7.80 ppm |
2016-09-01 | 5806-006-0838 | 8.80 ppm |
2016-09-01 | 5806-008-0809 | 8.80 ppm |
2016-09-01 | 5806-009-0941 | 4.60 ppm |
2016-09-01 | 5806-017-1005 | 7.00 ppm |
2016-10-04 | 5806-003-0938 | 9.20 ppm |
2016-10-04 | 5806-009-0948 | 4.70 ppm |
2016-10-05 | 5806-008-1440 | 13.0 ppm |
2016-10-11 | 5806-008-1023 | 11.0 ppm |
2016-10-18 | 5806-008-1047 | 11.0 ppm |
2016-10-20 | 5806-008-0732 | 10.00 ppm |
2016-10-25 | 5806-008-0931 | 10.00 ppm |
2016-10-31 | 5806-008-0939 | 9.40 ppm |
2016-11-01 | 5806-003-0724 | 9.00 ppm |
2016-11-02 | 5806-008-0625 | 8.80 ppm |
2016-11-04 | 5806-008-0637 | 8.50 ppm |
2016-11-06 | 5806-008-1459 | 10.00 ppm |
2016-11-07 | 5806-008-0728 | 8.30 ppm |
2016-11-09 | 5806-008-0624 | 8.00 ppm |
2016-11-11 | 5806-008-0628 | 8.10 ppm |
2016-11-14 | 5806-008-0702 | 7.90 ppm |
2016-11-21 | 5806-008-0659 | 7.50 ppm |
2016-11-29 | 5806-008-0751 | 7.30 ppm |
2016-12-01 | 5806-003-0753 | 9.40 ppm |
2016-12-01 | 5806-005-0825 | 8.90 ppm |
2016-12-01 | 5806-006-0857 | 8.70 ppm |
2016-12-01 | 5806-008-0808 | 7.80 ppm |
2016-12-01 | 5806-009-0845 | 8.40 ppm |
2016-12-06 | 5806-008-0734 | 7.10 ppm |
2017-01-03 | 5806-008-0950 | 7.20 ppm |
2017-01-09 | 5806-003-1448 | 9.50 ppm |
2017-02-08 | 5806-008-1301 | 8.70 ppm |
2017-02-09 | 5806-008-1330 | 7.00 ppm |
2017-02-13 | 5806-008-1448 | 7.20 ppm |
2017-02-14 | 5806-008-1425 | 6.60 ppm |
2017-02-15 | 5806-003-0942 | 9.00 ppm |
2017-02-15 | 5806-008-1100 | 6.50 ppm |
2017-02-16 | 5806-008-0958 | 6.90 ppm |
2017-02-21 | 5806-008-1341 | 8.50 ppm |
2017-02-22 | 5806-008-1338 | 7.10 ppm |
2017-02-23 | 5806-008-1251 | 6.90 ppm |
2017-02-24 | 5806-008-1042 | 7.20 ppm |
2017-03-07 | 5806-008-1010 | 7.00 ppm |
2017-03-08 | 5806-008-1459 | 5.50 ppm |
2017-03-10 | 5806-008-1218 | 6.90 ppm |
2017-03-29 | 5806-005-1215 | 5.60 ppm |
2017-04-19 | 5806-003-0716 | 9.90 ppm |
2017-04-19 | 5806-008-0735 | 7.20 ppm |
2017-05-02 | 5806-003-0652 | 9.20 ppm |
2017-05-09 | 5806-008-0823 | 7.00 ppm |
2017-06-20 | 5806-003-0838 | 9.60 ppm |
2017-06-26 | 5806-005-1047 | 5.30 ppm |
2017-06-26 | 5806-006-1015 | 4.70 ppm |
2017-06-26 | 5806-008-1059 | 7.10 ppm |
2017-06-27 | 5806-017-0743 | 3.60 ppm |
2017-07-13 | 5806-003-0951 | 9.30 ppm |
2017-07-13 | 5806-008-1008 | 7.10 ppm |
2017-07-13 | 5806-017-1017 | 4.70 ppm |
2017-08-09 | 5806-003-0851 | 9.40 ppm |
2017-08-09 | 5806-008-1005 | 7.40 ppm |
2017-08-27 | 5806-009-1110 | 7.00 ppm |
2017-08-28 | 5806-009-0751 | 6.40 ppm |
2017-08-29 | 5806-009-0743 | 5.90 ppm |
2017-08-30 | 5806-009-0657 | 5.70 ppm |
2017-09-05 | 5806-009-1015 | 5.30 ppm |
2017-09-07 | 5806-009-0805 | 5.10 ppm |
2017-09-08 | 5806-009-0829 | 5.30 ppm |
2017-09-11 | 5806-003-0830 | 9.50 ppm |
2017-09-11 | 5806-009-0945 | 5.10 ppm |
2017-09-11 | 5806-017-1007 | 5.00 ppm |
2017-09-12 | 5806-009-0947 | 5.00 ppm |
2017-09-13 | 5806-009-0943 | 4.90 ppm |
2017-09-18 | 5806-005-1018 | 5.20 ppm |
2017-09-18 | 5806-006-1032 | 4.50 ppm |
2017-09-18 | 5806-009-1040 | 7.20 ppm |
2017-10-03 | 5806-003-0802 | 9.50 ppm |
2017-11-07 | 5806-008-0954 | 11.0 ppm |
2017-11-08 | 5806-008-1215 | 10.00 ppm |
2017-11-13 | 5806-003-1224 | 9.70 ppm |
2017-11-13 | 5806-008-1237 | 8.90 ppm |
2017-11-14 | 5806-008-1220 | 8.90 ppm |
2017-11-15 | 5806-008-1215 | 8.60 ppm |
2017-11-16 | 5806-008-1210 | 8.60 ppm |
2017-11-17 | 5806-008-1228 | 8.50 ppm |
2017-11-20 | 5806-008-1248 | 9.30 ppm |
2017-11-21 | 5806-008-0815 | 8.40 ppm |
2017-12-07 | 5806-003-0745 | 9.40 ppm |
2017-12-07 | 5806-008-0822 | 7.40 ppm |
2017-12-07 | 5806-009-0805 | 5.50 ppm |
2017-12-12 | 5806-005-0937 | 4.00 ppm |
2017-12-14 | 5806-006-0952 | 4.90 ppm |
2017-12-14 | 5806-017-0829 | 2.40 ppm |
2018-01-11 | 5806-003-1005 | 9.90 ppm |
2018-01-11 | 5806-008-1106 | 7.50 ppm |
2018-02-08 | 5806-003-0957 | 10.00 ppm |
2018-02-08 | 5806-008-0614 | 7.40 ppm |
2018-02-13 | 5806-003-0632 | 9.80 ppm |
2018-02-13 | 5806-003-1500 | 9.70 ppm |
2018-03-08 | 5806-005-1223 | 5.30 ppm |
2018-03-08 | 5806-006-0918 | 8.80 ppm |
2018-03-08 | 5806-008-0816 | 7.40 ppm |
2018-03-13 | 5806-009-1012 | 4.90 ppm |
2018-03-15 | 5806-017-0814 | 6.90 ppm |
2018-04-23 | 5806-017-1118 | 7.60 ppm |
2018-04-24 | 5806-017-0818 | 7.10 ppm |
2018-04-25 | 5806-009-1028 | 4.60 ppm |
2018-04-25 | 5806-017-0959 | 7.10 ppm |
2018-04-26 | 5806-009-0915 | 4.60 ppm |
2018-04-26 | 5806-017-0836 | 6.20 ppm |
2018-04-30 | 5806-008-1112 | 14.0 ppm |
2018-05-01 | 5806-009-0859 | 4.70 ppm |
2018-05-03 | 5806-008-0717 | 8.30 ppm |
2018-05-04 | 5806-008-0745 | 8.00 ppm |
2018-05-08 | 5806-008-0900 | 7.90 ppm |
2018-05-29 | 5806-008-0907 | 8.20 ppm |
2018-05-29 | 5806-009-0956 | 5.00 ppm |
2018-06-14 | 5806-005-0820 | 7.50 ppm |
2018-06-14 | 5806-008-0753 | 8.10 ppm |
2018-06-14 | 5806-009-0720 | 5.00 ppm |
2018-06-20 | 5806-006-0840 | 9.80 ppm |
2018-06-20 | 5806-017-0915 | 6.80 ppm |
2018-07-11 | 5806-005-0807 | 6.60 ppm |
2018-07-11 | 5806-008-0845 | 8.30 ppm |
2018-07-11 | 5806-009-1002 | 5.00 ppm |
2018-08-09 | 5806-005-0930 | 6.30 ppm |
2018-08-09 | 5806-008-1000 | 8.40 ppm |
2018-08-09 | 5806-009-0828 | 4.90 ppm |
2018-08-23 | 5806-006-0805 | 5.40 ppm |
2018-08-23 | 5806-017-0845 | 7.20 ppm |
2018-09-11 | 5806-005-0949 | 6.00 ppm |
2018-09-11 | 5806-008-1008 | 7.90 ppm |
2018-09-11 | 5806-009-0930 | 4.90 ppm |
2018-09-19 | 5806-006-0948 | 9.40 ppm |
2018-09-19 | 5806-017-1036 | 6.60 ppm |
2018-10-01 | 5806-008-0942 | 7.60 ppm |
2018-10-01 | 5806-009-0949 | 4.70 ppm |
2018-10-08 | 5806-005-0809 | 5.90 ppm |
2018-10-08 | 5806-006-0852 | 10.00 ppm |
2018-11-13 | 5806-008-0743 | 7.60 ppm |
2018-12-04 | 5806-005-0741 | 5.20 ppm |
2018-12-04 | 5806-008-0830 | 7.20 ppm |
2018-12-05 | 5806-009-0735 | 7.40 ppm |
2018-12-11 | 5806-006-1012 | 3.80 ppm |
2018-12-11 | 5806-017-1035 | 6.60 ppm |
2019-01-28 | 5806-008-1045 | 11.0 ppm |
2019-01-29 | 5806-008-1139 | 9.30 ppm |
2019-01-30 | 5806-008-1057 | 8.60 ppm |
2019-01-31 | 5806-008-0939 | 8.60 ppm |
2019-02-04 | 5806-008-1456 | 7.40 ppm |
2019-02-05 | 5806-008-0950 | 7.60 ppm |
2019-02-11 | 5806-008-0900 | 7.20 ppm |
2019-03-12 | 5806-005-0814 | 5.20 ppm |
2019-03-12 | 5806-006-0728 | 3.90 ppm |
2019-03-12 | 5806-008-0833 | 6.90 ppm |
2019-03-13 | 5806-017-1059 | 3.30 ppm |
2019-03-14 | 5806-009-0716 | 4.50 ppm |
2019-04-04 | 5806-008-0752 | 7.10 ppm |
2019-04-16 | 5806-009-0925 | 4.70 ppm |
2019-04-18 | 5806-009-1017 | 4.70 ppm |
2019-04-19 | 5806-009-0720 | 4.90 ppm |
2019-04-22 | 5806-009-0851 | 4.80 ppm |
2019-04-23 | 5806-009-1017 | 5.00 ppm |
2019-04-24 | 5806-009-0739 | 5.00 ppm |
2019-04-25 | 5806-009-0924 | 5.00 ppm |
2019-04-29 | 5806-009-1445 | 4.90 ppm |
2019-04-30 | 5806-009-1101 | 4.90 ppm |
2019-05-01 | 5806-005-1046 | 5.60 ppm |
2019-05-01 | 5806-006-1025 | 4.20 ppm |
2019-05-01 | 5806-008-1105 | 6.90 ppm |
2019-05-01 | 5806-009-1003 | 4.90 ppm |
2019-05-02 | 5806-017-0747 | 4.70 ppm |
2019-05-31 | 5806-009-0728 | 4.90 ppm |
2019-06-13 | 5806-008-1156 | 7.20 ppm |
2019-06-13 | 5806-009-1053 | 4.80 ppm |
2019-06-13 | 5806-017-1133 | 4.70 ppm |
2019-06-20 | 5806-005-1051 | 8.40 ppm |
2019-06-20 | 5806-006-1013 | 8.80 ppm |
2019-07-18 | 5806-008-1010 | 7.50 ppm |
2019-07-18 | 5806-009-0956 | 5.00 ppm |
2019-07-18 | 5806-017-1024 | 4.90 ppm |
2019-07-23 | 5806-005-1021 | 9.10 ppm |
2019-07-23 | 5806-006-0951 | 9.60 ppm |
2019-08-06 | 5806-008-1240 | 7.60 ppm |
2019-08-06 | 5806-009-1104 | 5.00 ppm |
2019-08-06 | 5806-017-1301 | 4.90 ppm |
2019-08-07 | 5806-006-0701 | 4.40 ppm |
2019-08-08 | 5806-005-0959 | 9.00 ppm |
2019-09-24 | 5806-006-0900 | 4.40 ppm |
2019-09-24 | 5806-008-1031 | 7.20 ppm |
2019-09-24 | 5806-009-1013 | 5.00 ppm |
2019-09-26 | 5806-005-1034 | 9.00 ppm |
2019-09-26 | 5806-017-1005 | 6.00 ppm |
2019-10-08 | 5806-006-1033 | 4.50 ppm |
2019-10-08 | 5806-008-0950 | 7.80 ppm |
2019-10-08 | 5806-009-1042 | 5.10 ppm |
2019-10-31 | 5806-005-1112 | 5.80 ppm |
2019-10-31 | 5806-017-1041 | 7.60 ppm |
2019-11-19 | 5806-005-1342 | 5.80 ppm |
2019-11-19 | 5806-006-1327 | 4.10 ppm |
2019-11-19 | 5806-008-1355 | 7.10 ppm |
2019-12-12 | 5806-006-0951 | 4.00 ppm |
2019-12-12 | 5806-008-1007 | 7.20 ppm |
2019-12-12 | 5806-009-0913 | 5.10 ppm |
2019-12-19 | 5806-005-0823 | 4.50 ppm |
2019-12-19 | 5806-017-0921 | 6.40 ppm |