Nitrate
City of Riverside
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 | N/A | 0 | 0 | N/A |
2015 | 5.08 ppm | 63 | 63 | 4.52 ppm - 6.33 ppm |
2016 | 4.88 ppm | 49 | 49 | 4.40 ppm - 5.40 ppm |
2017 | 5.16 ppm | 50 | 50 | 4.30 ppm - 5.70 ppm |
2018 | 5.41 ppm | 52 | 52 | 4.60 ppm - 6.20 ppm |
2019 | 5.55 ppm | 52 | 52 | 4.70 ppm - 7.00 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 |
---|---|---|
2015-01-06 | 9590-107-0835 | 4.52 ppm |
2015-01-13 | 9590-107-0918 | 6.10 ppm |
2015-01-20 | 9590-107-1030 | 5.42 ppm |
2015-01-27 | 9590-107-0902 | 6.10 ppm |
2015-02-03 | 9590-107-0907 | 6.10 ppm |
2015-02-10 | 9590-107-0819 | 5.42 ppm |
2015-02-17 | 9590-107-0845 | 5.65 ppm |
2015-02-24 | 9590-107-0846 | 5.87 ppm |
2015-03-03 | 9590-107-0914 | 6.33 ppm |
2015-03-10 | 9590-107-0850 | 4.52 ppm |
2015-03-17 | 9590-107-0823 | 4.97 ppm |
2015-03-24 | 9590-107-0929 | 4.74 ppm |
2015-03-31 | 9590-107-0920 | 4.74 ppm |
2015-04-07 | 9590-107-0937 | 4.97 ppm |
2015-04-14 | 9590-107-0840 | 4.74 ppm |
2015-04-21 | 9590-107-0958 | 4.74 ppm |
2015-04-28 | 9590-107-0900 | 4.97 ppm |
2015-05-05 | 9590-107-0945 | 5.20 ppm |
2015-05-12 | 9590-107-0950 | 5.20 ppm |
2015-05-19 | 9590-107-0840 | 5.87 ppm |
2015-05-26 | 9590-107-0940 | 4.97 ppm |
2015-06-02 | 9590-107-0925 | 4.97 ppm |
2015-06-09 | 9590-107-0845 | 4.97 ppm |
2015-06-16 | 9590-107-1010 | 4.97 ppm |
2015-06-23 | 9590-107-0845 | 4.97 ppm |
2015-06-30 | 9590-107-1036 | 4.97 ppm |
2015-07-07 | 9590-107-0840 | 4.74 ppm |
2015-07-14 | 9590-107-0949 | 4.97 ppm |
2015-07-21 | 9590-107-0820 | 5.20 ppm |
2015-07-21 | 9590-107-0858 | 5.42 ppm |
2015-07-28 | 9590-107-0934 | 5.20 ppm |
2015-08-04 | 9590-107-0950 | 4.97 ppm |
2015-08-11 | 9590-107-0943 | 4.97 ppm |
2015-08-18 | 9590-107-0856 | 4.97 ppm |
2015-08-25 | 9590-107-0919 | 5.20 ppm |
2015-09-01 | 9590-107-0845 | 5.42 ppm |
2015-09-08 | 9590-107-0830 | 4.97 ppm |
2015-09-15 | 9590-107-1022 | 5.20 ppm |
2015-09-22 | 9590-107-0840 | 5.20 ppm |
2015-09-29 | 9590-107-0952 | 4.97 ppm |
2015-10-06 | 9590-107-1032 | 5.20 ppm |
2015-10-13 | 9590-107-0900 | 4.97 ppm |
2015-10-20 | 9590-107-0936 | 4.74 ppm |
2015-10-27 | 9590-107-0850 | 4.90 ppm |
2015-10-27 | 9590-107-0850 | 4.97 ppm |
2015-11-03 | 9590-107-0935 | 5.10 ppm |
2015-11-03 | 9590-107-0935 | 4.97 ppm |
2015-11-10 | 9590-107-0830 | 4.90 ppm |
2015-11-10 | 9590-107-0830 | 4.97 ppm |
2015-11-17 | 9590-107-1035 | 4.70 ppm |
2015-11-17 | 9590-107-1035 | 4.74 ppm |
2015-11-24 | 9590-107-0830 | 4.90 ppm |
2015-11-24 | 9590-107-0830 | 4.97 ppm |
2015-12-01 | 9590-107-1000 | 4.80 ppm |
2015-12-01 | 9590-107-1000 | 4.74 ppm |
2015-12-08 | 9590-107-0830 | 4.90 ppm |
2015-12-08 | 9590-107-0830 | 4.97 ppm |
2015-12-15 | 9590-107-1003 | 4.70 ppm |
2015-12-15 | 9590-107-1003 | 4.74 ppm |
2015-12-22 | 9590-107-0915 | 4.90 ppm |
2015-12-22 | 9590-107-0915 | 4.97 ppm |
2015-12-29 | 9590-107-0919 | 4.80 ppm |
2015-12-29 | 9590-107-0919 | 4.97 ppm |
2016-01-05 | 9590-107-0840 | 4.90 ppm |
2016-01-12 | 9590-107-1009 | 5.40 ppm |
2016-01-26 | 9590-107-0947 | 4.60 ppm |
2016-02-02 | 9590-107-0835 | 4.60 ppm |
2016-02-09 | 9590-107-1013 | 4.50 ppm |
2016-02-16 | 9590-107-0850 | 4.60 ppm |
2016-02-23 | 9590-107-1045 | 4.70 ppm |
2016-03-01 | 9590-107-0845 | 4.60 ppm |
2016-03-08 | 9590-107-1244 | 4.40 ppm |
2016-03-15 | 9590-107-0845 | 5.10 ppm |
2016-03-22 | 9590-107-1139 | 4.80 ppm |
2016-03-29 | 9590-107-1008 | 4.70 ppm |
2016-04-05 | 9590-107-0840 | 4.70 ppm |
2016-04-12 | 9590-107-1230 | 4.70 ppm |
2016-04-19 | 9590-107-1141 | 4.70 ppm |
2016-04-26 | 9590-107-0835 | 4.80 ppm |
2016-05-03 | 9590-107-1129 | 4.70 ppm |
2016-05-10 | 9590-107-0840 | 4.70 ppm |
2016-05-17 | 9590-107-0840 | 4.50 ppm |
2016-05-24 | 9590-107-1134 | 4.60 ppm |
2016-05-31 | 9590-107-0830 | 4.60 ppm |
2016-06-07 | 9590-107-1105 | 5.10 ppm |
2016-06-14 | 9590-107-0925 | 5.00 ppm |
2016-06-21 | 9590-107-1105 | 5.10 ppm |
2016-06-28 | 9590-107-0830 | 4.80 ppm |
2016-07-05 | 9590-107-0835 | 5.00 ppm |
2016-07-12 | 9590-107-1230 | 4.80 ppm |
2016-07-19 | 9590-107-0830 | 5.00 ppm |
2016-07-26 | 9590-107-1312 | 5.20 ppm |
2016-08-02 | 9590-107-0915 | 5.10 ppm |
2016-08-09 | 9590-107-1057 | 5.10 ppm |
2016-08-16 | 9590-107-0915 | 5.10 ppm |
2016-08-23 | 9590-107-1120 | 5.10 ppm |
2016-08-30 | 9590-107-0830 | 4.90 ppm |
2016-09-06 | 9590-107-1041 | 4.80 ppm |
2016-09-27 | 9590-107-0845 | 5.10 ppm |
2016-10-04 | 9590-107-1233 | 5.10 ppm |
2016-10-11 | 9590-107-0840 | 5.20 ppm |
2016-10-18 | 9590-107-0850 | 5.20 ppm |
2016-10-25 | 9590-107-1137 | 5.30 ppm |
2016-11-01 | 9590-107-0840 | 5.10 ppm |
2016-11-08 | 9590-107-1035 | 4.70 ppm |
2016-11-15 | 9590-107-1055 | 5.40 ppm |
2016-11-22 | 9590-107-0835 | 4.50 ppm |
2016-11-29 | 9590-107-1120 | 5.00 ppm |
2016-12-06 | 9590-107-0840 | 4.80 ppm |
2016-12-13 | 9590-107-0855 | 4.70 ppm |
2016-12-20 | 9590-107-0830 | 4.60 ppm |
2016-12-27 | 9590-107-1025 | 5.30 ppm |
2017-01-04 | 9590-107-0900 | 5.20 ppm |
2017-01-10 | 9590-107-1235 | 5.60 ppm |
2017-01-17 | 9590-107-1140 | 5.10 ppm |
2017-01-24 | 9590-107-0845 | 4.90 ppm |
2017-01-31 | 9590-107-1235 | 4.30 ppm |
2017-02-07 | 9590-107-0900 | 5.60 ppm |
2017-02-14 | 9590-107-1315 | 4.30 ppm |
2017-02-21 | 9590-107-0845 | 5.10 ppm |
2017-02-28 | 9590-107-0820 | 4.80 ppm |
2017-03-07 | 9590-107-0850 | 4.40 ppm |
2017-03-28 | 9590-107-1139 | 4.40 ppm |
2017-04-04 | 9590-107-0835 | 4.80 ppm |
2017-04-11 | 9590-107-1235 | 4.60 ppm |
2017-04-18 | 9590-107-1305 | 5.00 ppm |
2017-04-25 | 9590-107-0915 | 4.80 ppm |
2017-05-02 | 9590-107-1039 | 5.00 ppm |
2017-05-09 | 9590-107-0910 | 5.20 ppm |
2017-05-16 | 9590-107-1146 | 4.90 ppm |
2017-05-23 | 9590-107-0845 | 5.20 ppm |
2017-05-30 | 9590-107-0835 | 5.00 ppm |
2017-06-06 | 9590-107-1135 | 5.00 ppm |
2017-06-13 | 9590-107-0840 | 5.00 ppm |
2017-06-20 | 9590-107-1135 | 5.10 ppm |
2017-06-27 | 9590-107-0845 | 5.40 ppm |
2017-07-05 | 9590-107-1126 | 5.50 ppm |
2017-07-11 | 9590-107-0908 | 5.40 ppm |
2017-07-18 | 9590-107-0845 | 5.50 ppm |
2017-07-25 | 9590-107-1055 | 5.30 ppm |
2017-08-01 | 9590-107-0845 | 5.70 ppm |
2017-08-08 | 9590-107-1230 | 5.40 ppm |
2017-08-15 | 9590-107-1137 | 5.60 ppm |
2017-08-22 | 9590-107-0856 | 5.60 ppm |
2017-08-29 | 9590-107-1005 | 5.10 ppm |
2017-09-05 | 9590-107-1235 | 5.50 ppm |
2017-09-12 | 9590-107-0845 | 5.60 ppm |
2017-09-19 | 9590-107-0905 | 5.10 ppm |
2017-09-26 | 9590-107-1230 | 5.40 ppm |
2017-10-03 | 9590-107-0845 | 5.20 ppm |
2017-10-10 | 9590-107-0915 | 5.00 ppm |
2017-10-17 | 9590-107-1155 | 5.40 ppm |
2017-10-24 | 9590-107-0830 | 5.30 ppm |
2017-10-31 | 9590-107-1140 | 5.30 ppm |
2017-11-07 | 9590-107-0830 | 5.10 ppm |
2017-11-14 | 9590-107-0959 | 5.00 ppm |
2017-11-21 | 9590-107-0830 | 5.40 ppm |
2017-11-28 | 9590-107-1135 | 5.60 ppm |
2017-12-05 | 9590-107-0900 | 5.30 ppm |
2017-12-12 | 9590-107-1255 | 5.40 ppm |
2017-12-19 | 9590-107-0945 | 5.40 ppm |
2017-12-27 | 9590-107-1230 | 5.20 ppm |
2018-01-02 | 9590-107-0900 | 5.20 ppm |
2018-01-10 | 9590-107-1136 | 5.40 ppm |
2018-01-16 | 9590-107-0850 | 5.40 ppm |
2018-01-23 | 9590-107-1110 | 5.10 ppm |
2018-01-30 | 9590-107-0900 | 5.10 ppm |
2018-02-06 | 9590-107-1200 | 5.00 ppm |
2018-02-13 | 9590-107-0855 | 4.80 ppm |
2018-02-20 | 9590-107-1048 | 4.90 ppm |
2018-02-27 | 9590-107-0825 | 4.90 ppm |
2018-03-06 | 9590-107-0835 | 4.70 ppm |
2018-03-13 | 9590-107-1310 | 4.80 ppm |
2018-03-20 | 9590-107-0840 | 5.00 ppm |
2018-03-27 | 9590-107-1302 | 5.50 ppm |
2018-04-03 | 9590-107-0910 | 4.60 ppm |
2018-04-10 | 9590-107-1258 | 5.10 ppm |
2018-04-17 | 9590-107-0945 | 5.20 ppm |
2018-04-24 | 9590-107-1345 | 5.30 ppm |
2018-05-01 | 9590-107-0840 | 5.40 ppm |
2018-05-08 | 9590-107-1230 | 5.50 ppm |
2018-05-15 | 9590-107-0850 | 5.40 ppm |
2018-05-22 | 9590-107-0945 | 5.30 ppm |
2018-05-29 | 9590-107-0915 | 5.30 ppm |
2018-06-05 | 9590-107-1130 | 5.60 ppm |
2018-06-12 | 9590-107-0830 | 5.50 ppm |
2018-06-19 | 9590-107-1230 | 5.70 ppm |
2018-06-26 | 9590-107-1230 | 5.40 ppm |
2018-07-03 | 4790-107-1015 | 5.30 ppm |
2018-07-10 | 4790-107-0920 | 5.50 ppm |
2018-07-17 | 4790-107-1013 | 6.20 ppm |
2018-07-24 | 4790-107-0845 | 5.70 ppm |
2018-07-31 | 4790-107-1235 | 5.50 ppm |
2018-08-07 | 4790-107-0840 | 5.40 ppm |
2018-08-14 | 4790-107-1135 | 5.10 ppm |
2018-08-21 | 4790-107-0840 | 5.50 ppm |
2018-08-28 | 4790-107-1235 | 5.30 ppm |
2018-09-05 | 4790-107-0850 | 5.80 ppm |
2018-09-12 | 4790-107-1235 | 5.50 ppm |
2018-09-18 | 4790-107-0850 | 5.90 ppm |
2018-09-25 | 4790-107-1235 | 5.90 ppm |
2018-10-03 | 4790-107-0920 | 5.70 ppm |
2018-10-09 | 4790-107-0850 | 5.60 ppm |
2018-10-16 | 4790-107-1235 | 5.70 ppm |
2018-10-23 | 4790-107-0845 | 5.70 ppm |
2018-10-30 | 4790-107-1159 | 5.60 ppm |
2018-11-06 | 4790-107-0905 | 5.50 ppm |
2018-11-13 | 4790-107-0850 | 5.40 ppm |
2018-11-20 | 4790-107-1232 | 5.40 ppm |
2018-11-27 | 4790-107-1235 | 5.40 ppm |
2018-12-04 | 4790-107-0935 | 5.90 ppm |
2018-12-11 | 4790-107-1245 | 6.00 ppm |
2018-12-18 | 4790-107-0845 | 6.00 ppm |
2018-12-24 | 4790-107-0755 | 5.70 ppm |
2019-01-02 | 4790-107-0900 | 5.60 ppm |
2019-01-08 | 4790-107-1120 | 5.20 ppm |
2019-01-15 | 4790-107-0840 | 6.00 ppm |
2019-01-22 | 4790-107-0945 | 6.50 ppm |
2019-01-29 | 4790-107-1138 | 5.90 ppm |
2019-02-05 | 4790-107-1135 | 5.80 ppm |
2019-02-12 | 4790-107-0925 | 5.80 ppm |
2019-02-19 | 4790-107-0845 | 5.70 ppm |
2019-02-26 | 4790-107-1145 | 5.90 ppm |
2019-03-05 | 4790-107-1235 | 5.30 ppm |
2019-03-12 | 4790-107-0845 | 5.20 ppm |
2019-03-19 | 4790-107-1151 | 5.20 ppm |
2019-03-26 | 4790-107-0810 | 5.40 ppm |
2019-04-02 | 4790-107-0900 | 6.00 ppm |
2019-04-09 | 4790-107-1231 | 5.20 ppm |
2019-04-16 | 4790-107-0850 | 4.90 ppm |
2019-04-23 | 4790-107-0912 | 5.60 ppm |
2019-04-30 | 4790-107-0845 | 5.80 ppm |
2019-05-14 | 4790-107-1000 | 5.50 ppm |
2019-05-21 | 4790-107-0915 | 5.40 ppm |
2019-05-28 | 4790-107-1235 | 5.20 ppm |
2019-06-04 | 4790-107-0915 | 5.20 ppm |
2019-06-11 | 4790-107-1245 | 4.90 ppm |
2019-06-18 | 4790-107-0850 | 5.20 ppm |
2019-06-25 | 4790-107-0835 | 5.50 ppm |
2019-07-02 | 4790-107-0910 | 5.20 ppm |
2019-07-09 | 4790-107-0905 | 5.20 ppm |
2019-07-16 | 4790-107-1125 | 4.70 ppm |
2019-07-23 | 4790-107-0845 | 5.80 ppm |
2019-07-30 | 4790-107-1245 | 5.80 ppm |
2019-08-06 | 4790-107-0855 | 5.20 ppm |
2019-08-13 | 4790-107-0920 | 5.90 ppm |
2019-08-20 | 4790-107-0940 | 5.50 ppm |
2019-08-27 | 4790-107-1116 | 5.20 ppm |
2019-09-03 | 4790-107-0850 | 5.70 ppm |
2019-09-10 | 4790-107-0913 | 5.30 ppm |
2019-09-17 | 4790-107-0850 | 5.50 ppm |
2019-09-24 | 4790-107-0938 | 5.50 ppm |
2019-10-01 | 4790-107-1139 | 5.50 ppm |
2019-10-08 | 4790-107-0919 | 5.40 ppm |
2019-10-15 | 4790-107-1021 | 5.10 ppm |
2019-10-22 | 4790-107-0910 | 5.70 ppm |
2019-10-29 | 4790-107-1115 | 5.20 ppm |
2019-11-05 | 4790-107-0855 | 5.30 ppm |
2019-11-12 | 4790-107-0915 | 5.30 ppm |
2019-11-19 | 4790-107-0920 | 5.30 ppm |
2019-11-26 | 4790-107-0855 | 5.60 ppm |
2019-12-03 | 4790-107-0917 | 5.90 ppm |
2019-12-10 | 4790-107-0845 | 6.20 ppm |
2019-12-18 | 4790-107-0915 | 5.80 ppm |
2019-12-23 | 4790-107-0845 | 6.80 ppm |
2019-12-30 | 4790-107-0840 | 7.00 ppm |