Nitrate
Los Angeles County Waterworks District 37-Acton
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 |
---|---|---|---|---|
2014 | 6.85 ppm | 52 | 52 | 5.20 ppm - 7.68 ppm |
2015 | 6.75 ppm | 58 | 58 | 4.81 ppm - 8.65 ppm |
2016 | 7.16 ppm | 53 | 53 | 5.73 ppm - 8.20 ppm |
2017 | 6.46 ppm | 30 | 30 | 1.06 ppm - 8.60 ppm |
2018 | 7.53 ppm | 52 | 51 | ND - 8.10 ppm |
2019 | 7.34 ppm | 55 | 53 | ND - 8.70 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 |
---|---|---|
2014-01-06 | 5442-006-0830 | 7.36 ppm |
2014-01-13 | 5442-006-0825 | 5.58 ppm |
2014-01-21 | 5442-006-0910 | 7.07 ppm |
2014-01-27 | 5442-006-0825 | 7.03 ppm |
2014-02-03 | 5442-006-0840 | 5.65 ppm |
2014-02-10 | 5442-006-0800 | 5.51 ppm |
2014-02-18 | 5442-006-0905 | 6.91 ppm |
2014-02-24 | 5442-006-0840 | 7.03 ppm |
2014-03-03 | 5442-006-0845 | 5.42 ppm |
2014-03-10 | 5442-006-0825 | 5.53 ppm |
2014-03-17 | 5442-006-0840 | 7.09 ppm |
2014-03-24 | 5442-006-0840 | 7.12 ppm |
2014-03-31 | 5442-006-0809 | 5.49 ppm |
2014-04-07 | 5442-006-0845 | 6.78 ppm |
2014-04-14 | 5442-006-0735 | 6.96 ppm |
2014-04-21 | 5442-006-0840 | 6.98 ppm |
2014-04-28 | 5442-006-0820 | 6.98 ppm |
2014-05-05 | 5442-006-0830 | 6.94 ppm |
2014-05-12 | 5442-006-0825 | 7.21 ppm |
2014-05-19 | 5442-006-0840 | 7.21 ppm |
2014-05-27 | 5442-006-0810 | 7.05 ppm |
2014-06-02 | 5442-006-0840 | 7.25 ppm |
2014-06-09 | 5442-006-0815 | 7.12 ppm |
2014-06-16 | 5442-006-0935 | 6.91 ppm |
2014-06-23 | 5442-006-0815 | 6.98 ppm |
2014-07-02 | 5442-006-1130 | 7.09 ppm |
2014-07-07 | 5442-006-0835 | 7.21 ppm |
2014-07-14 | 5442-006-0810 | 7.45 ppm |
2014-07-21 | 5442-006-0835 | 7.68 ppm |
2014-07-28 | 5442-006-0830 | 7.41 ppm |
2014-08-04 | 5442-006-0835 | 7.66 ppm |
2014-08-11 | 5442-006-0810 | 7.34 ppm |
2014-08-18 | 5442-006-0840 | 7.36 ppm |
2014-08-25 | 5442-006-0810 | 7.52 ppm |
2014-09-02 | 5442-006-0819 | 7.25 ppm |
2014-09-08 | 5442-006-1246 | 7.23 ppm |
2014-09-15 | 5442-006-0846 | 7.18 ppm |
2014-09-22 | 5442-006-0835 | 7.27 ppm |
2014-09-29 | 5442-006-0808 | 7.23 ppm |
2014-10-06 | 5442-006-0827 | 6.80 ppm |
2014-10-14 | 5442-006-0815 | 6.94 ppm |
2014-10-20 | 5442-006-0824 | 7.03 ppm |
2014-10-27 | 5442-006-0830 | 7.18 ppm |
2014-11-03 | 5442-006-0845 | 7.34 ppm |
2014-11-10 | 5442-006-0815 | 7.32 ppm |
2014-11-17 | 5442-006-0825 | 7.21 ppm |
2014-11-24 | 5442-006-0855 | 7.34 ppm |
2014-12-01 | 5442-006-0925 | 5.20 ppm |
2014-12-08 | 5442-006-0837 | 5.47 ppm |
2014-12-15 | 5442-006-0820 | 5.53 ppm |
2014-12-22 | 5442-006-0735 | 7.32 ppm |
2014-12-29 | 5442-006-0815 | 5.53 ppm |
2015-01-05 | 5442-006-0830 | 4.95 ppm |
2015-01-12 | 5442-006-0810 | 4.99 ppm |
2015-01-20 | 5442-006-0845 | 5.20 ppm |
2015-01-26 | 5442-006-0817 | 7.21 ppm |
2015-02-02 | 5442-006-0830 | 4.95 ppm |
2015-02-09 | 5442-006-0820 | 5.60 ppm |
2015-02-17 | 5442-006-0845 | 6.33 ppm |
2015-02-23 | 5442-006-0830 | 6.78 ppm |
2015-03-02 | 5442-006-0835 | 5.94 ppm |
2015-03-09 | 5442-006-0825 | 5.33 ppm |
2015-03-16 | 5442-006-0832 | 7.61 ppm |
2015-03-23 | 5442-006-0826 | 7.45 ppm |
2015-03-30 | 5442-006-0930 | 7.39 ppm |
2015-04-06 | 5442-006-0804 | 7.41 ppm |
2015-04-13 | 5442-006-0800 | 7.48 ppm |
2015-04-20 | 5442-006-0831 | 7.39 ppm |
2015-04-27 | 5442-006-0920 | 7.52 ppm |
2015-05-04 | 5442-006-0830 | 7.52 ppm |
2015-05-11 | 5442-006-0810 | 7.64 ppm |
2015-05-18 | 5442-006-0810 | 7.77 ppm |
2015-05-26 | 5442-006-0825 | 7.70 ppm |
2015-06-01 | 5442-006-0845 | 7.68 ppm |
2015-06-08 | 5442-006-0825 | 7.64 ppm |
2015-06-15 | 5442-006-0840 | 7.68 ppm |
2015-06-22 | 5442-006-0815 | 7.64 ppm |
2015-06-29 | 5442-006-0825 | 7.86 ppm |
2015-07-06 | 5442-006-0845 | 8.65 ppm |
2015-07-13 | 5442-006-0835 | 7.86 ppm |
2015-07-20 | 5442-006-0925 | 7.86 ppm |
2015-07-27 | 5442-006-1250 | 8.04 ppm |
2015-08-03 | 5442-006-1035 | 8.11 ppm |
2015-08-10 | 5442-006-0910 | 5.90 ppm |
2015-08-17 | 5442-006-0938 | 5.22 ppm |
2015-08-24 | 5442-006-0845 | 5.87 ppm |
2015-08-31 | 5442-006-0900 | 5.90 ppm |
2015-09-08 | 5442-006-0940 | 5.26 ppm |
2015-09-14 | 5442-006-0840 | 5.92 ppm |
2015-09-21 | 5442-006-0945 | 5.76 ppm |
2015-09-28 | 5442-006-0840 | 5.01 ppm |
2015-10-05 | 5442-006-0910 | 5.76 ppm |
2015-10-13 | 5442-006-0840 | 5.11 ppm |
2015-10-19 | 5442-006-0940 | 8.02 ppm |
2015-10-26 | 5442-006-0900 | 7.97 ppm |
2015-11-02 | 5442-006-0845 | 8.04 ppm |
2015-11-09 | 5442-006-0900 | 8.13 ppm |
2015-11-16 | 5442-006-0845 | 8.00 ppm |
2015-11-23 | 5442-006-0915 | 8.04 ppm |
2015-11-30 | 5442-006-0840 | 8.27 ppm |
2015-12-07 | 5442-006-0845 | 8.15 ppm |
2015-12-07 | 5442-006-0845 | 8.15 ppm |
2015-12-08 | 5442-006-1245 | 5.45 ppm |
2015-12-08 | 5442-006-1245 | 5.44 ppm |
2015-12-14 | 5442-006-0855 | 5.65 ppm |
2015-12-14 | 5442-006-0855 | 5.65 ppm |
2015-12-21 | 5442-006-0920 | 4.81 ppm |
2015-12-21 | 5442-006-0920 | 4.81 ppm |
2015-12-28 | 5442-006-0810 | 6.15 ppm |
2015-12-28 | 5442-006-0810 | 6.14 ppm |
2016-01-04 | 5442-006-0850 | 6.09 ppm |
2016-01-11 | 5442-006-1000 | 5.85 ppm |
2016-01-19 | 5442-006-0938 | 5.90 ppm |
2016-01-25 | 5442-006-0900 | 5.93 ppm |
2016-02-01 | 5442-006-0940 | 6.00 ppm |
2016-02-08 | 5442-006-0900 | 6.02 ppm |
2016-02-16 | 5442-006-0930 | 6.01 ppm |
2016-02-22 | 5442-006-0900 | 6.00 ppm |
2016-02-29 | 5442-006-0900 | 6.06 ppm |
2016-03-07 | 5442-006-0937 | 6.03 ppm |
2016-03-14 | 5442-006-0905 | 5.95 ppm |
2016-03-21 | 5442-006-0920 | 5.91 ppm |
2016-03-28 | 5442-006-0845 | 7.60 ppm |
2016-04-04 | 5442-006-0925 | 7.79 ppm |
2016-04-11 | 5442-006-0900 | 7.58 ppm |
2016-04-18 | 5442-006-0921 | 7.23 ppm |
2016-04-25 | 5442-006-1110 | 6.05 ppm |
2016-05-02 | 5442-006-0905 | 7.44 ppm |
2016-05-09 | 5442-006-0845 | 7.17 ppm |
2016-05-16 | 5442-006-0853 | 7.21 ppm |
2016-05-23 | 5442-006-0900 | 7.03 ppm |
2016-05-31 | 5442-006-0900 | 7.16 ppm |
2016-06-06 | 5442-006-0952 | 7.01 ppm |
2016-06-13 | 5442-006-0900 | 7.62 ppm |
2016-06-20 | 5442-006-0917 | 7.32 ppm |
2016-06-27 | 5442-006-0900 | 7.34 ppm |
2016-07-05 | 5442-006-0915 | 7.37 ppm |
2016-07-11 | 5442-006-1345 | 7.34 ppm |
2016-07-18 | 5442-006-1055 | 7.44 ppm |
2016-07-27 | 5442-006-0900 | 7.22 ppm |
2016-08-01 | 5442-006-0922 | 7.30 ppm |
2016-08-08 | 5442-006-0900 | 7.50 ppm |
2016-08-15 | 5442-006-0935 | 7.58 ppm |
2016-08-22 | 5442-006-0915 | 7.79 ppm |
2016-08-29 | 5442-006-0845 | 7.88 ppm |
2016-09-06 | 5442-006-0910 | 7.70 ppm |
2016-09-12 | 5442-006-0900 | 8.11 ppm |
2016-09-19 | 5442-006-0939 | 7.80 ppm |
2016-09-26 | 5442-006-0914 | 7.91 ppm |
2016-10-03 | 5442-006-0917 | 7.82 ppm |
2016-10-11 | 5442-006-0845 | 7.73 ppm |
2016-10-17 | 5442-006-1132 | 7.91 ppm |
2016-10-24 | 5442-006-1011 | 7.89 ppm |
2016-10-31 | 5442-006-0843 | 7.92 ppm |
2016-11-07 | 5442-006-1030 | 7.84 ppm |
2016-11-14 | 5442-006-0935 | 7.80 ppm |
2016-11-21 | 5442-006-1107 | 7.77 ppm |
2016-11-28 | 5442-006-0840 | 5.73 ppm |
2016-12-05 | 5442-006-0940 | 8.02 ppm |
2016-12-12 | 5442-006-0927 | 8.20 ppm |
2016-12-16 | 5442-006-0920 | 7.46 ppm |
2016-12-19 | 5442-006-1048 | 7.68 ppm |
2016-12-27 | 5442-006-0815 | 7.48 ppm |
2017-01-03 | 5442-006-0930 | 7.23 ppm |
2017-01-09 | 5442-006-1108 | 4.73 ppm |
2017-01-18 | 5442-006-1108 | 7.38 ppm |
2017-01-23 | 5442-006-0856 | 4.74 ppm |
2017-01-30 | 5442-006-0930 | 4.73 ppm |
2017-02-06 | 5442-006-0922 | 1.06 ppm |
2017-02-13 | 5442-006-0910 | 4.67 ppm |
2017-02-21 | 5442-006-1028 | 4.74 ppm |
2017-02-27 | 5442-006-0936 | 7.27 ppm |
2017-03-06 | 5442-006-0924 | 4.81 ppm |
2017-03-13 | 5442-006-0948 | 7.41 ppm |
2017-03-20 | 5442-006-0925 | 4.88 ppm |
2017-03-28 | 5442-006-1017 | 4.85 ppm |
2017-04-03 | 5442-006-0926 | 4.86 ppm |
2017-05-15 | 9590-006-0725 | 7.50 ppm |
2017-05-22 | 9590-006-0830 | 7.40 ppm |
2017-05-30 | 9590-006-0820 | 7.40 ppm |
2017-06-12 | 9588-006-0710 | 7.50 ppm |
2017-06-19 | 9588-006-0735 | 8.60 ppm |
2017-06-26 | 9588-006-0730 | 7.40 ppm |
2017-07-03 | 9588-006-0740 | 8.40 ppm |
2017-07-10 | 9588-006-0702 | 7.80 ppm |
2017-07-17 | 9588-006-0715 | 7.40 ppm |
2017-07-24 | 9588-006-0831 | 7.30 ppm |
2017-11-20 | 9590-006-0934 | 7.50 ppm |
2017-11-27 | 9590-006-0910 | 6.50 ppm |
2017-12-04 | 9590-006-0905 | 7.40 ppm |
2017-12-11 | 9590-006-0919 | 7.50 ppm |
2017-12-18 | 9590-006-0810 | 7.20 ppm |
2017-12-27 | 9590-006-0843 | 7.60 ppm |
2018-01-02 | 9590-006-0838 | 7.50 ppm |
2018-01-08 | 9590-006-0840 | 7.40 ppm |
2018-01-16 | 9590-006-0810 | 7.50 ppm |
2018-01-22 | 9590-006-0935 | 7.40 ppm |
2018-01-29 | 9590-006-0746 | 7.50 ppm |
2018-02-05 | 9590-006-0940 | 7.50 ppm |
2018-02-12 | 9590-006-1035 | 7.50 ppm |
2018-02-20 | 9590-006-0838 | 7.60 ppm |
2018-02-26 | 9590-006-1010 | 7.60 ppm |
2018-03-05 | 9590-006-1050 | 7.60 ppm |
2018-03-12 | 9590-006-1210 | 7.60 ppm |
2018-03-19 | 9590-006-0850 | 7.50 ppm |
2018-03-27 | 9590-006-1147 | 7.90 ppm |
2018-04-02 | 9590-006-1027 | 7.60 ppm |
2018-04-09 | 9590-006-1206 | 8.10 ppm |
2018-04-16 | 9590-006-1016 | 7.70 ppm |
2018-04-23 | 9590-006-1205 | 7.70 ppm |
2018-04-30 | 9590-006-1228 | 7.70 ppm |
2018-05-07 | 9590-006-1144 | 7.80 ppm |
2018-05-14 | 9590-006-1021 | 7.80 ppm |
2018-05-21 | 9590-006-1150 | 7.80 ppm |
2018-05-29 | 9590-006-1151 | 7.70 ppm |
2018-06-04 | 9590-006-1040 | 7.80 ppm |
2018-06-11 | 9590-006-0851 | 7.70 ppm |
2018-06-18 | 9590-006-1237 | 8.10 ppm |
2018-06-25 | 9590-006-0827 | 7.70 ppm |
2018-07-02 | 9590-006-1025 | 7.80 ppm |
2018-07-09 | 9590-006-1123 | 8.00 ppm |
2018-07-16 | 9590-006-1130 | 8.00 ppm |
2018-07-23 | 9590-006-1218 | 8.10 ppm |
2018-07-30 | 9590-006-1145 | 8.00 ppm |
2018-08-06 | 9590-006-1218 | 7.60 ppm |
2018-08-13 | 9590-006-1115 | 7.50 ppm |
2018-08-20 | 9590-006-0950 | 7.70 ppm |
2018-08-27 | 9590-006-1001 | 7.60 ppm |
2018-09-04 | 9590-006-1235 | 7.70 ppm |
2018-09-10 | 9590-006-0910 | 7.70 ppm |
2018-09-17 | 9590-006-1112 | 7.80 ppm |
2018-09-24 | 9590-006-1158 | 7.80 ppm |
2018-10-01 | 9590-006-0938 | 7.80 ppm |
2018-10-09 | 9590-006-0900 | 7.70 ppm |
2018-10-15 | 9590-006-1124 | 7.70 ppm |
2018-10-22 | 9590-006-1205 | ND |
2018-10-29 | 9590-006-1108 | 7.80 ppm |
2018-11-05 | 9590-006-1030 | 7.60 ppm |
2018-11-14 | 9590-006-1138 | 7.80 ppm |
2018-11-19 | 9590-006-1110 | 7.70 ppm |
2018-11-26 | 9590-006-1027 | 7.80 ppm |
2018-12-03 | 9590-006-1000 | 7.80 ppm |
2018-12-10 | 9590-006-1051 | 6.70 ppm |
2018-12-17 | 9590-006-1110 | 7.90 ppm |
2018-12-26 | 9590-006-1101 | 6.80 ppm |
2019-01-02 | 9590-006-1158 | 6.80 ppm |
2019-01-07 | 9590-006-1000 | 8.00 ppm |
2019-01-14 | 9590-006-1015 | 7.80 ppm |
2019-01-22 | 9590-006-1120 | 7.10 ppm |
2019-01-28 | 9590-006-1040 | 7.80 ppm |
2019-02-04 | 9590-006-0842 | 6.70 ppm |
2019-02-11 | 9590-006-1045 | 7.00 ppm |
2019-02-19 | 9590-006-1100 | 7.60 ppm |
2019-02-25 | 9590-006-1030 | 7.60 ppm |
2019-03-04 | 9590-006-0925 | 7.00 ppm |
2019-03-11 | 9590-006-1020 | 7.70 ppm |
2019-03-18 | 9590-006-1120 | 7.40 ppm |
2019-03-26 | 9590-006-1030 | 7.70 ppm |
2019-04-01 | 9590-006-0945 | 7.60 ppm |
2019-04-08 | 9590-006-1100 | 7.70 ppm |
2019-04-15 | 9590-006-1040 | 7.70 ppm |
2019-04-22 | 9590-006-1045 | 7.50 ppm |
2019-04-29 | 9590-006-1015 | 7.30 ppm |
2019-05-06 | 9590-006-1115 | 7.80 ppm |
2019-05-13 | 9590-006-1040 | 7.60 ppm |
2019-05-20 | 9590-006-1115 | 7.60 ppm |
2019-05-28 | 9590-006-1225 | 7.70 ppm |
2019-06-03 | 9590-006-0735 | 7.20 ppm |
2019-06-10 | 9590-006-0730 | 7.60 ppm |
2019-06-17 | 9590-006-1110 | 7.40 ppm |
2019-06-24 | 9590-006-1030 | 7.60 ppm |
2019-07-01 | 9590-006-0928 | 7.60 ppm |
2019-07-08 | 9590-006-1021 | 7.70 ppm |
2019-07-15 | 9590-006-1100 | 7.70 ppm |
2019-07-22 | 9590-006-1000 | 7.70 ppm |
2019-07-29 | 9590-006-1000 | 7.50 ppm |
2019-08-05 | 9590-006-0930 | 7.60 ppm |
2019-08-12 | 9590-006-0810 | 7.70 ppm |
2019-08-19 | 9590-006-1115 | ND |
2019-08-26 | 9590-006-1216 | 8.00 ppm |
2019-09-03 | 9590-006-1025 | 7.80 ppm |
2019-09-09 | 9590-006-1240 | 7.80 ppm |
2019-09-16 | 9590-006-0918 | 7.90 ppm |
2019-09-23 | 9590-006-1050 | 8.10 ppm |
2019-09-30 | 9590-006-0945 | ND |
2019-10-02 | 9590-006-1335 | 7.70 ppm |
2019-10-07 | 9590-006-1148 | 8.20 ppm |
2019-10-15 | 9590-006-1101 | 8.10 ppm |
2019-10-21 | 9590-006-1215 | 8.10 ppm |
2019-10-28 | 9590-006-1110 | 8.20 ppm |
2019-11-04 | 9590-006-0815 | 8.00 ppm |
2019-11-12 | 9590-006-1013 | 8.70 ppm |
2019-11-14 | 9590-006-1140 | 7.10 ppm |
2019-11-18 | 9590-006-1134 | 7.30 ppm |
2019-11-25 | 9590-006-1000 | 7.50 ppm |
2019-12-02 | 9590-006-1145 | 7.40 ppm |
2019-12-09 | 9590-006-1230 | 7.40 ppm |
2019-12-16 | 9590-006-1055 | 7.50 ppm |
2019-12-23 | 9590-006-0932 | 7.30 ppm |
2019-12-30 | 9590-006-0951 | 7.50 ppm |