Nitrate
California American Water Company - Antelope
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 | 1.62 ppm | 32 | 29 | ND - 4.12 ppm |
2015 | 1.72 ppm | 21 | 21 | 0.400 ppm - 3.81 ppm |
2016 | 1.88 ppm | 18 | 18 | 0.340 ppm - 3.86 ppm |
2017 | 1.79 ppm | 19 | 18 | ND - 4.12 ppm |
2018 | 1.13 ppm | 25 | 18 | ND - 4.28 ppm |
2019 | 1.19 ppm | 26 | 25 | ND - 3.80 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 |
---|---|---|
2014-02-11 | 1225-008-1145 | 4.12 ppm |
2014-05-06 | 5810-004-1116 | 0.836 ppm |
2014-05-06 | 5810-010-1216 | ND |
2014-05-06 | 5810-011-1038 | 1.36 ppm |
2014-05-06 | 5810-013-1124 | 1.87 ppm |
2014-05-06 | 5810-014-1029 | 2.94 ppm |
2014-05-06 | 5810-018-1307 | 0.497 ppm |
2014-05-07 | 5810-001-0935 | 1.78 ppm |
2014-05-07 | 5810-002-1134 | 0.655 ppm |
2014-05-07 | 5810-007-1100 | 0.881 ppm |
2014-05-07 | 1225-008-1209 | 3.99 ppm |
2014-05-07 | 5810-008-1209 | 3.84 ppm |
2014-05-07 | 5810-009-1054 | 0.655 ppm |
2014-05-07 | 5810-016-0930 | 0.881 ppm |
2014-05-07 | 5810-017-1017 | 0.971 ppm |
2014-08-11 | 1225-002-1005 | 0.723 ppm |
2014-08-11 | 1225-009-1135 | 0.660 ppm |
2014-08-11 | 1225-011-0940 | 1.38 ppm |
2014-08-11 | 1225-013-1229 | 1.94 ppm |
2014-08-11 | 1225-017-1115 | 1.42 ppm |
2014-08-12 | 1225-001-0910 | 1.87 ppm |
2014-08-12 | 1225-003-1321 | 1.15 ppm |
2014-08-12 | 1225-004-1120 | 0.852 ppm |
2014-08-12 | 1225-005-1243 | 3.47 ppm |
2014-08-12 | 1225-006-1230 | 1.13 ppm |
2014-08-12 | 1225-007-1120 | 0.951 ppm |
2014-08-12 | 1225-008-1040 | 3.51 ppm |
2014-08-12 | 1225-010-1325 | ND |
2014-08-12 | 1225-014-1044 | 2.71 ppm |
2014-08-12 | 1225-016-0955 | 0.908 ppm |
2014-08-13 | 1225-018-1227 | ND |
2014-12-09 | 1225-008-0925 | 3.78 ppm |
2015-01-22 | 5810-012-1417 | 1.45 ppm |
2015-02-11 | 1225-008-1154 | 3.81 ppm |
2015-05-18 | 1233-008-1003 | 3.16 ppm |
2015-08-05 | 1225-003-1110 | 1.28 ppm |
2015-08-05 | 1225-005-1222 | 3.62 ppm |
2015-08-05 | 1225-006-0945 | 1.16 ppm |
2015-08-10 | 1225-011-0855 | 1.22 ppm |
2015-08-10 | 1225-013-1021 | 1.97 ppm |
2015-08-10 | 1225-014-1125 | 2.80 ppm |
2015-08-11 | 1225-001-0915 | 1.90 ppm |
2015-08-11 | 1225-002-1236 | 0.430 ppm |
2015-08-11 | 1225-004-1255 | 0.800 ppm |
2015-08-11 | 1225-007-0907 | 1.000 ppm |
2015-08-11 | 1225-008-1014 | 3.38 ppm |
2015-08-11 | 1225-009-1020 | 0.590 ppm |
2015-08-11 | 1225-018-1145 | 0.460 ppm |
2015-08-12 | 1225-010-0859 | 0.400 ppm |
2015-08-12 | 1225-016-1050 | 0.900 ppm |
2015-08-13 | 1225-012-1100 | 1.30 ppm |
2015-08-13 | 1225-017-0909 | 0.680 ppm |
2015-11-16 | 1225-008-0930 | 3.76 ppm |
2016-02-10 | 1225-008-0935 | 3.62 ppm |
2016-05-24 | 1225-008-1105 | 3.44 ppm |
2016-08-10 | 1225-001-1411 | 2.00 ppm |
2016-08-10 | 1225-009-1315 | 0.530 ppm |
2016-08-10 | 1225-013-1111 | 2.02 ppm |
2016-08-17 | 1225-010-1145 | 0.340 ppm |
2016-08-17 | 1225-012-1312 | 2.00 ppm |
2016-08-23 | 1225-002-0900 | 0.710 ppm |
2016-08-23 | 1225-011-0832 | 1.38 ppm |
2016-08-23 | 1225-016-1027 | 0.920 ppm |
2016-08-23 | 1225-017-0947 | 0.670 ppm |
2016-08-24 | 1225-005-1206 | 3.86 ppm |
2016-08-24 | 1225-007-1335 | 1.09 ppm |
2016-08-24 | 1225-014-1025 | 2.85 ppm |
2016-08-29 | 1225-004-1103 | 0.940 ppm |
2016-08-29 | 1225-008-1308 | 3.42 ppm |
2016-08-30 | 1225-018-0717 | 0.470 ppm |
2016-11-29 | 1225-008-0934 | 3.53 ppm |
2017-02-09 | 1225-008-1005 | 3.09 ppm |
2017-05-11 | 1225-008-0955 | 3.39 ppm |
2017-08-15 | 1225-002-0940 | 0.720 ppm |
2017-08-15 | 1225-009-1330 | 0.550 ppm |
2017-08-15 | 1225-011-0802 | 1.82 ppm |
2017-08-15 | 1225-016-1125 | 0.980 ppm |
2017-08-16 | 1225-013-0912 | 2.06 ppm |
2017-08-22 | 1225-001-1050 | 1.99 ppm |
2017-08-22 | 1225-010-1335 | 0.420 ppm |
2017-08-22 | 1225-014-0942 | 3.05 ppm |
2017-08-22 | 1225-017-1245 | 1.52 ppm |
2017-08-23 | 1225-007-1247 | 1.07 ppm |
2017-08-23 | 1225-008-1242 | 3.95 ppm |
2017-08-30 | 1225-012-1110 | 1.84 ppm |
2017-08-30 | 1225-018-1030 | 0.520 ppm |
2017-11-08 | 1225-008-1000 | 4.12 ppm |
2017-12-18 | 1225-003-1145 | 1.73 ppm |
2017-12-18 | 1225-006-1035 | 1.24 ppm |
2017-12-18 | 1233-039-1350 | ND |
2018-02-13 | 1233-039-1210 | ND |
2018-02-15 | 1225-008-1100 | 4.16 ppm |
2018-03-08 | 1225-039-0950 | ND |
2018-03-08 | 1233-039-0950 | ND |
2018-03-15 | 1233-039-1020 | ND |
2018-04-03 | 1233-039-0940 | ND |
2018-05-02 | 1225-008-1105 | 4.28 ppm |
2018-05-02 | 1225-039-1050 | ND |
2018-06-20 | 1225-039-1200 | 1.18 ppm |
2018-08-07 | 1233-009-0900 | 0.440 ppm |
2018-08-07 | 1233-010-1310 | ND |
2018-08-07 | 1233-011-1120 | 1.30 ppm |
2018-08-07 | 1233-012-1030 | 1.40 ppm |
2018-08-07 | 1233-018-1210 | 0.400 ppm |
2018-08-08 | 1233-002-0920 | 0.500 ppm |
2018-08-08 | 1233-016-1340 | 0.810 ppm |
2018-08-08 | 1233-017-1010 | 1.30 ppm |
2018-08-09 | 1233-007-1130 | 0.890 ppm |
2018-08-09 | 1233-008-1020 | 3.60 ppm |
2018-08-14 | 1233-003-1130 | 1.40 ppm |
2018-08-14 | 1233-004-0830 | 0.880 ppm |
2018-08-14 | 1233-006-1000 | 0.920 ppm |
2018-08-14 | 1233-013-1220 | 1.80 ppm |
2018-08-14 | 1233-014-1045 | 2.00 ppm |
2018-08-14 | 1233-040-1040 | 0.970 ppm |
2019-01-10 | 1233-039-0850 | 0.920 ppm |
2019-03-13 | 1233-039-0905 | 1.20 ppm |
2019-04-10 | 1233-039-0832 | 0.920 ppm |
2019-05-16 | 1225-001-1320 | 2.06 ppm |
2019-06-12 | 1233-039-0828 | 0.850 ppm |
2019-07-23 | 1233-039-0828 | 0.950 ppm |
2019-08-06 | 1225-002-1220 | 0.800 ppm |
2019-08-06 | 1233-003-1300 | 1.60 ppm |
2019-08-06 | 1233-006-0830 | 1.000 ppm |
2019-08-06 | 1225-009-1420 | 0.510 ppm |
2019-08-06 | 1225-014-1515 | 1.93 ppm |
2019-08-06 | 1225-016-1323 | 1.03 ppm |
2019-08-06 | 1233-039-0836 | 1.000 ppm |
2019-08-07 | 1225-001-1440 | 2.08 ppm |
2019-08-07 | 1225-017-1255 | 0.950 ppm |
2019-08-08 | 1225-004-1615 | 1.06 ppm |
2019-08-08 | 1225-007-1302 | 1.09 ppm |
2019-08-08 | 1225-008-1227 | 3.80 ppm |
2019-08-08 | 1225-010-1630 | 0.420 ppm |
2019-08-08 | 1225-012-1358 | 1.51 ppm |
2019-08-08 | 1225-013-1400 | 2.20 ppm |
2019-08-08 | 1225-018-1458 | 0.500 ppm |
2019-09-10 | 1233-039-0835 | 0.830 ppm |
2019-10-16 | 1233-039-0935 | ND |
2019-11-05 | 1233-039-1235 | 0.940 ppm |
2019-12-09 | 1233-039-0820 | 0.820 ppm |