Nitrate
City of Chino Hills
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 | 6.26 ppm | 149 | 149 | 2.19 ppm - 10.2 ppm |
2015 | 6.33 ppm | 64 | 64 | 2.26 ppm - 9.26 ppm |
2016 | 7.17 ppm | 12 | 12 | 4.60 ppm - 9.40 ppm |
2017 | 6.14 ppm | 53 | 53 | 2.50 ppm - 10.00 ppm |
2018 | N/A | 0 | 0 | N/A |
2019 | 2.13 ppm | 3 | 3 | 2.10 ppm - 2.20 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 | 4790-001-1100 | 7.68 ppm |
2014-01-23 | 4790-001-1300 | 7.91 ppm |
2014-01-23 | 4790-017-1045 | 4.29 ppm |
2014-01-23 | 4790-017-1330 | 4.52 ppm |
2014-01-23 | 4790-022-1245 | 4.29 ppm |
2014-01-29 | 4790-001-0745 | 8.36 ppm |
2014-01-29 | 4790-017-0800 | 4.29 ppm |
2014-01-29 | 4790-022-0830 | 5.42 ppm |
2014-02-05 | 4790-001-0730 | 8.58 ppm |
2014-02-05 | 4790-017-0745 | 3.84 ppm |
2014-02-05 | 4790-022-0810 | 5.20 ppm |
2014-02-12 | 4790-001-0915 | 7.68 ppm |
2014-02-12 | 4790-017-0930 | 3.39 ppm |
2014-02-12 | 4790-022-0940 | 4.52 ppm |
2014-02-19 | 4790-001-0845 | 7.45 ppm |
2014-02-19 | 4790-017-0900 | 2.94 ppm |
2014-02-19 | 4790-022-0825 | 3.84 ppm |
2014-02-26 | 4790-001-0815 | 7.23 ppm |
2014-02-26 | 4790-017-0800 | 2.71 ppm |
2014-02-26 | 4790-022-0830 | 4.07 ppm |
2014-03-11 | 4790-001-1240 | 8.36 ppm |
2014-03-11 | 4790-017-1300 | 3.61 ppm |
2014-03-11 | 4790-022-1100 | 5.20 ppm |
2014-03-20 | 4790-001-1320 | 8.13 ppm |
2014-03-20 | 4790-017-1340 | 2.94 ppm |
2014-03-20 | 4790-022-1300 | 6.10 ppm |
2014-03-26 | 4790-001-0830 | 7.91 ppm |
2014-03-26 | 4790-017-0845 | 2.48 ppm |
2014-03-26 | 4790-022-0855 | 4.07 ppm |
2014-04-02 | 4790-001-1230 | 7.68 ppm |
2014-04-02 | 4790-017-1240 | 2.48 ppm |
2014-04-02 | 4790-022-1130 | 4.07 ppm |
2014-04-03 | 4790-009-1040 | 9.49 ppm |
2014-04-09 | 4790-001-1225 | 8.58 ppm |
2014-04-09 | 4790-009-1200 | 9.26 ppm |
2014-04-09 | 4790-017-1140 | 2.71 ppm |
2014-04-09 | 4790-022-1110 | 5.87 ppm |
2014-04-16 | 4790-001-0735 | 8.36 ppm |
2014-04-16 | 4790-009-0815 | 9.49 ppm |
2014-04-16 | 4790-017-0755 | 2.71 ppm |
2014-04-16 | 4790-022-0830 | 6.55 ppm |
2014-04-23 | 4790-001-0715 | 8.81 ppm |
2014-04-23 | 4790-009-0755 | 9.49 ppm |
2014-04-23 | 4790-017-0730 | 2.71 ppm |
2014-04-23 | 4790-022-0820 | 6.78 ppm |
2014-05-02 | 4790-001-1245 | 8.58 ppm |
2014-05-02 | 4790-009-1300 | 10.2 ppm |
2014-05-02 | 4790-017-1255 | 2.71 ppm |
2014-05-02 | 4790-022-1320 | 7.68 ppm |
2014-05-07 | 4790-001-0845 | 8.81 ppm |
2014-05-07 | 4790-009-0920 | 9.49 ppm |
2014-05-07 | 4790-017-0900 | 2.48 ppm |
2014-05-07 | 4790-022-0940 | 7.00 ppm |
2014-05-14 | 4790-001-0745 | 8.81 ppm |
2014-05-14 | 4790-009-0820 | 9.49 ppm |
2014-05-14 | 4790-017-0800 | 2.48 ppm |
2014-05-21 | 4790-001-1225 | 8.58 ppm |
2014-05-21 | 4790-009-1200 | 9.26 ppm |
2014-05-21 | 4790-017-1125 | 2.48 ppm |
2014-05-21 | 4790-022-1215 | 7.23 ppm |
2014-05-28 | 4790-001-0730 | 8.36 ppm |
2014-05-28 | 4790-009-0820 | 8.81 ppm |
2014-05-28 | 4790-017-0800 | 2.48 ppm |
2014-05-28 | 4790-022-0830 | 7.45 ppm |
2014-06-04 | 4790-001-0830 | 8.13 ppm |
2014-06-04 | 4790-009-0905 | 8.81 ppm |
2014-06-04 | 4790-017-0845 | 2.48 ppm |
2014-06-04 | 4790-022-0915 | 6.33 ppm |
2014-06-11 | 4790-001-0730 | 8.58 ppm |
2014-06-11 | 4790-009-0815 | 9.26 ppm |
2014-06-11 | 4790-017-0745 | 2.71 ppm |
2014-06-11 | 4790-022-0830 | 7.23 ppm |
2014-06-18 | 4790-001-0820 | 7.91 ppm |
2014-06-18 | 4790-009-0840 | 9.26 ppm |
2014-06-18 | 4790-017-0905 | 2.26 ppm |
2014-06-18 | 4790-022-0945 | 7.45 ppm |
2014-06-25 | 4790-001-0725 | 8.36 ppm |
2014-06-25 | 4790-009-0810 | 9.04 ppm |
2014-06-25 | 4790-017-0745 | 2.48 ppm |
2014-06-25 | 4790-022-0830 | 6.78 ppm |
2014-07-02 | 4790-001-1005 | 8.58 ppm |
2014-07-02 | 4790-009-0947 | 9.26 ppm |
2014-07-02 | 4790-017-0930 | 2.48 ppm |
2014-07-02 | 4790-022-0855 | 6.33 ppm |
2014-07-09 | 4790-001-0715 | 8.36 ppm |
2014-07-09 | 4790-009-0750 | 9.04 ppm |
2014-07-09 | 4790-017-0725 | 2.48 ppm |
2014-07-09 | 4790-022-0830 | 6.33 ppm |
2014-07-18 | 4790-001-1015 | 9.26 ppm |
2014-07-18 | 4790-009-1030 | 9.71 ppm |
2014-07-18 | 4790-017-1050 | 2.94 ppm |
2014-07-18 | 4790-022-1120 | 7.23 ppm |
2014-07-23 | 4790-001-0715 | 8.13 ppm |
2014-07-23 | 4790-009-0740 | 8.81 ppm |
2014-07-23 | 4790-017-0800 | 2.48 ppm |
2014-07-23 | 4790-022-1030 | 6.55 ppm |
2014-07-29 | 4790-014-1030 | 3.39 ppm |
2014-07-30 | 4790-001-0710 | 8.58 ppm |
2014-07-30 | 4790-009-0735 | 9.04 ppm |
2014-07-30 | 4790-017-0810 | 2.48 ppm |
2014-07-30 | 4790-022-1030 | 6.55 ppm |
2014-08-06 | 4790-001-0720 | 8.36 ppm |
2014-08-06 | 4790-009-0735 | 8.58 ppm |
2014-08-06 | 4790-017-0800 | 2.48 ppm |
2014-08-06 | 4790-022-0745 | 6.78 ppm |
2014-08-13 | 4790-001-0700 | 8.58 ppm |
2014-08-13 | 4790-009-0730 | 9.26 ppm |
2014-08-13 | 4790-017-0750 | 2.48 ppm |
2014-08-13 | 4790-022-0900 | 6.55 ppm |
2014-08-20 | 4790-001-0700 | 8.81 ppm |
2014-08-20 | 4790-017-0730 | 2.48 ppm |
2014-08-20 | 4790-022-1040 | 6.10 ppm |
2014-08-27 | 4790-001-0710 | 8.58 ppm |
2014-08-27 | 4790-017-0740 | 2.48 ppm |
2014-08-27 | 4790-022-1030 | 5.87 ppm |
2014-09-03 | 4790-001-0710 | 8.81 ppm |
2014-09-03 | 4790-017-0740 | 2.48 ppm |
2014-09-03 | 4790-022-1040 | 6.33 ppm |
2014-09-10 | 4790-001-0745 | 8.58 ppm |
2014-09-10 | 4790-017-0830 | 2.24 ppm |
2014-09-10 | 4790-022-1020 | 5.20 ppm |
2014-09-17 | 4790-001-0800 | 8.81 ppm |
2014-09-25 | 4790-001-0700 | 8.58 ppm |
2014-09-25 | 4790-017-0740 | 2.19 ppm |
2014-09-25 | 4790-022-1040 | 5.20 ppm |
2014-10-01 | 4790-001-0740 | 8.58 ppm |
2014-10-01 | 4790-017-0800 | 2.26 ppm |
2014-10-01 | 4790-022-1000 | 5.42 ppm |
2014-10-02 | 4790-009-1330 | 9.26 ppm |
2014-10-08 | 4790-001-0705 | 8.13 ppm |
2014-10-08 | 4790-009-0720 | 8.13 ppm |
2014-10-08 | 4790-017-0735 | 2.19 ppm |
2014-10-08 | 4790-022-1045 | 4.97 ppm |
2014-10-15 | 4790-001-0700 | 8.36 ppm |
2014-10-15 | 4790-009-0725 | 8.36 ppm |
2014-10-15 | 4790-017-0735 | 2.26 ppm |
2014-10-15 | 4790-022-1040 | 5.20 ppm |
2014-11-19 | 4790-001-0720 | 9.04 ppm |
2014-11-19 | 4790-009-0740 | 8.81 ppm |
2014-11-19 | 4790-017-0805 | 2.26 ppm |
2014-11-19 | 4790-022-1000 | 5.20 ppm |
2014-12-04 | 4790-001-0725 | 8.36 ppm |
2014-12-04 | 4790-009-0755 | 9.71 ppm |
2014-12-04 | 4790-017-0811 | 4.97 ppm |
2014-12-04 | 4790-022-1015 | 4.29 ppm |
2014-12-15 | 4790-001-0735 | 6.10 ppm |
2014-12-15 | 4790-009-0755 | 7.91 ppm |
2014-12-15 | 4790-017-0815 | 4.07 ppm |
2014-12-15 | 4790-022-1030 | 3.84 ppm |
2015-03-12 | 4790-001-0715 | 7.23 ppm |
2015-03-12 | 4790-009-0740 | 9.26 ppm |
2015-03-12 | 4790-017-0800 | 4.97 ppm |
2015-03-12 | 4790-022-1000 | 7.00 ppm |
2015-03-18 | 4790-001-0815 | 7.45 ppm |
2015-03-18 | 4790-009-0946 | 8.81 ppm |
2015-03-18 | 4790-017-0900 | 4.07 ppm |
2015-03-18 | 4790-022-1015 | 5.65 ppm |
2015-03-25 | 4790-001-0800 | 7.68 ppm |
2015-04-01 | 4790-001-0830 | 7.91 ppm |
2015-04-01 | 4790-009-0900 | 8.81 ppm |
2015-04-01 | 4790-017-0915 | 3.39 ppm |
2015-04-01 | 4790-022-1040 | 5.87 ppm |
2015-04-08 | 4790-001-0750 | 8.13 ppm |
2015-04-08 | 4790-009-0815 | 8.81 ppm |
2015-04-08 | 4790-017-0840 | 3.16 ppm |
2015-04-08 | 4790-022-0955 | 6.10 ppm |
2015-04-15 | 4790-001-0751 | 8.13 ppm |
2015-04-15 | 4790-009-0815 | 8.81 ppm |
2015-04-15 | 4790-017-0826 | 2.71 ppm |
2015-04-15 | 4790-022-1045 | 5.20 ppm |
2015-04-22 | 4790-001-0753 | 8.36 ppm |
2015-04-22 | 4790-009-0840 | 8.81 ppm |
2015-04-22 | 4790-017-0907 | 2.71 ppm |
2015-04-22 | 4790-022-1115 | 6.33 ppm |
2015-04-29 | 4790-001-0725 | 8.13 ppm |
2015-04-29 | 4790-009-0750 | 8.58 ppm |
2015-04-29 | 4790-017-0805 | 2.48 ppm |
2015-04-29 | 4790-022-0826 | 5.20 ppm |
2015-05-06 | 4790-022-0800 | 4.97 ppm |
2015-05-13 | 4790-022-0928 | 5.42 ppm |
2015-05-21 | 4790-022-0825 | 5.20 ppm |
2015-05-27 | 4790-022-0950 | 5.42 ppm |
2015-06-03 | 4790-022-1100 | 4.97 ppm |
2015-06-11 | 4790-022-1042 | 5.20 ppm |
2015-06-17 | 4790-022-0955 | 6.55 ppm |
2015-06-24 | 4790-022-1020 | 6.33 ppm |
2015-07-01 | 4790-022-0725 | 4.29 ppm |
2015-07-08 | 4790-022-1045 | 6.10 ppm |
2015-07-15 | 4790-001-0720 | 7.91 ppm |
2015-07-15 | 4790-009-0804 | 8.36 ppm |
2015-07-15 | 4790-017-0836 | 2.26 ppm |
2015-07-15 | 4790-022-1052 | 6.10 ppm |
2015-07-23 | 4790-022-1031 | 6.33 ppm |
2015-07-28 | 4790-022-1003 | 7.45 ppm |
2015-08-04 | 4790-001-0733 | 8.13 ppm |
2015-08-04 | 4790-009-0754 | 8.81 ppm |
2015-08-04 | 4790-017-0832 | 2.26 ppm |
2015-08-04 | 4790-022-0907 | 7.23 ppm |
2015-08-12 | 4790-022-1000 | 6.78 ppm |
2015-08-19 | 4790-022-1000 | 6.55 ppm |
2015-08-26 | 4790-022-0928 | 4.97 ppm |
2015-09-01 | 4790-022-1036 | 5.42 ppm |
2015-09-23 | 4790-022-1014 | 6.55 ppm |
2015-09-30 | 4790-022-1040 | 6.33 ppm |
2015-10-07 | 4790-022-0836 | 7.00 ppm |
2015-10-14 | 4790-022-1130 | 6.33 ppm |
2015-10-21 | 4790-001-1137 | 8.36 ppm |
2015-10-21 | 4790-009-1053 | 9.26 ppm |
2015-10-21 | 4790-017-1030 | 2.48 ppm |
2015-10-21 | 4790-022-0827 | 6.33 ppm |
2015-10-28 | 4790-022-1010 | 6.10 ppm |
2015-11-04 | 4790-022-1102 | 6.55 ppm |
2015-11-10 | 4790-022-0835 | 7.23 ppm |
2016-01-19 | 4790-001-1035 | 7.10 ppm |
2016-01-19 | 4790-009-1115 | 9.20 ppm |
2016-03-03 | 4790-014-1130 | 4.60 ppm |
2016-04-26 | 4790-001-1045 | 7.50 ppm |
2016-04-26 | 4790-009-1115 | 9.40 ppm |
2016-09-21 | 9588-001-1050 | 7.50 ppm |
2016-11-16 | 9588-017-1050 | 5.70 ppm |
2016-11-16 | 9588-022-1130 | 7.10 ppm |
2016-11-23 | 9588-022-1035 | 6.40 ppm |
2016-12-09 | 9588-001-0915 | 8.20 ppm |
2016-12-09 | 9588-022-1015 | 7.70 ppm |
2016-12-13 | 9588-022-0810 | 5.60 ppm |
2017-01-18 | 9588-022-0800 | 5.50 ppm |
2017-02-02 | 9588-022-1116 | 5.30 ppm |
2017-02-09 | 9588-022-1136 | 5.70 ppm |
2017-02-15 | 9588-022-1101 | 5.20 ppm |
2017-02-16 | 9588-001-1010 | 8.10 ppm |
2017-02-16 | 9588-014-0950 | 4.40 ppm |
2017-02-16 | 9588-017-1040 | 4.60 ppm |
2017-02-22 | 9588-009-1245 | 9.30 ppm |
2017-02-22 | 9588-022-0804 | 5.90 ppm |
2017-03-08 | 4790-022-1018 | 5.00 ppm |
2017-04-11 | 4790-001-0815 | 8.10 ppm |
2017-04-11 | 4790-017-0847 | 3.90 ppm |
2017-04-11 | 4790-022-0905 | 6.50 ppm |
2017-04-18 | 9588-022-0953 | 6.40 ppm |
2017-04-19 | 9588-009-1030 | 10.00 ppm |
2017-04-25 | 4790-022-1048 | 8.90 ppm |
2017-05-02 | 4790-022-0821 | 6.40 ppm |
2017-05-09 | 4790-022-1050 | 5.80 ppm |
2017-05-16 | 4790-022-1143 | 6.30 ppm |
2017-05-23 | 4790-022-0730 | 6.20 ppm |
2017-05-30 | 9588-022-0810 | 6.20 ppm |
2017-06-06 | 4790-022-0750 | 4.80 ppm |
2017-06-13 | 4790-022-0946 | 6.00 ppm |
2017-06-20 | 4790-022-0755 | 5.00 ppm |
2017-06-27 | 4790-022-1113 | 6.10 ppm |
2017-07-03 | 4790-022-1007 | 5.90 ppm |
2017-07-11 | 4790-022-0820 | 6.40 ppm |
2017-07-18 | 9588-001-0804 | 8.40 ppm |
2017-07-18 | 9588-017-0836 | 3.20 ppm |
2017-07-18 | 9588-022-1107 | 6.10 ppm |
2017-08-08 | 4790-022-1005 | 6.10 ppm |
2017-08-16 | 4790-022-1110 | 6.30 ppm |
2017-08-22 | 4790-022-1037 | 6.00 ppm |
2017-08-29 | 9588-022-0816 | 6.30 ppm |
2017-09-05 | 4790-022-0758 | 6.60 ppm |
2017-09-12 | 4790-022-0840 | 6.40 ppm |
2017-09-14 | 9588-014-1410 | 4.30 ppm |
2017-09-19 | 4790-022-1000 | 6.10 ppm |
2017-09-26 | 9588-022-0820 | 6.20 ppm |
2017-10-04 | 9588-022-1045 | 6.70 ppm |
2017-10-11 | 4790-001-0735 | 7.70 ppm |
2017-10-11 | 4790-017-0830 | 2.50 ppm |
2017-10-11 | 4790-022-0923 | 5.60 ppm |
2017-10-17 | 4790-022-1043 | 5.70 ppm |
2017-10-25 | 9588-022-1230 | 6.80 ppm |
2017-11-02 | 9588-022-0950 | 6.40 ppm |
2017-11-08 | 9588-022-1030 | 6.30 ppm |
2017-11-14 | 4790-022-0840 | 6.20 ppm |
2017-11-20 | 4790-022-0813 | 5.90 ppm |
2017-11-28 | 9588-022-1048 | 6.40 ppm |
2017-12-06 | 9588-022-0907 | 6.40 ppm |
2017-12-19 | 9588-022-0803 | 6.80 ppm |
2017-12-26 | 4790-022-1015 | 5.90 ppm |
2019-05-16 | 4790-014-0902 | 2.20 ppm |
2019-11-20 | 4790-014-0845 | 2.10 ppm |
2019-11-26 | 4790-014-0820 | 2.10 ppm |