Nitrate
California Water Service Company - Dixon
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 | 5.09 ppm | 70 | 70 | 2.11 ppm - 9.55 ppm |
2015 | 5.06 ppm | 44 | 43 | ND - 9.80 ppm |
2016 | 4.95 ppm | 57 | 56 | ND - 9.92 ppm |
2017 | 5.09 ppm | 54 | 54 | 3.34 ppm - 10.2 ppm |
2018 | 4.89 ppm | 50 | 50 | 3.18 ppm - 9.64 ppm |
2019 | 4.85 ppm | 50 | 50 | 3.71 ppm - 10.7 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 | 5701-006-1025 | 2.88 ppm |
2014-01-14 | 5701-006-1608 | 2.54 ppm |
2014-01-15 | 5701-007-1057 | 8.28 ppm |
2014-01-15 | 5701-009-1445 | 3.49 ppm |
2014-01-21 | 5701-006-0907 | 2.93 ppm |
2014-01-29 | 5701-006-1010 | 2.92 ppm |
2014-02-03 | 5701-006-1000 | 2.91 ppm |
2014-02-11 | 5701-006-1455 | 2.49 ppm |
2014-02-18 | 5701-002-0932 | 5.02 ppm |
2014-02-18 | 5701-006-0945 | 3.98 ppm |
2014-02-18 | 5701-008-1145 | 5.07 ppm |
2014-02-24 | 5701-002-1416 | 5.06 ppm |
2014-02-24 | 5701-002-1421 | 5.06 ppm |
2014-02-24 | 5701-002-1426 | 5.05 ppm |
2014-02-24 | 5701-002-1431 | 5.04 ppm |
2014-02-24 | 5701-002-1446 | 5.05 ppm |
2014-02-24 | 5701-002-1501 | 5.06 ppm |
2014-02-24 | 5701-002-1516 | 5.05 ppm |
2014-02-24 | 5701-002-1546 | 5.06 ppm |
2014-02-24 | 5701-002-1616 | 5.06 ppm |
2014-02-24 | 5701-006-1310 | 3.10 ppm |
2014-03-03 | 5701-006-1035 | 2.94 ppm |
2014-03-11 | 5701-006-1029 | 2.46 ppm |
2014-03-12 | 5701-017-1603 | 2.49 ppm |
2014-03-17 | 5701-006-1310 | 3.31 ppm |
2014-03-24 | 5701-006-1403 | 2.16 ppm |
2014-05-06 | 5701-006-1344 | 2.82 ppm |
2014-05-06 | 5701-008-1543 | 4.76 ppm |
2014-05-12 | 5701-006-1310 | 2.81 ppm |
2014-05-20 | 5701-002-0945 | 5.18 ppm |
2014-05-20 | 5701-003-1136 | 9.34 ppm |
2014-05-20 | 5810-003-1142 | 9.04 ppm |
2014-05-20 | 5701-005-0857 | 7.58 ppm |
2014-05-20 | 5701-006-0905 | 2.30 ppm |
2014-05-27 | 5701-006-0956 | 3.50 ppm |
2014-06-04 | 5701-006-1424 | 2.11 ppm |
2014-06-09 | 5701-006-1330 | 3.16 ppm |
2014-06-10 | 5701-017-0800 | 2.76 ppm |
2014-06-16 | 5701-006-1420 | 2.88 ppm |
2014-06-25 | 5701-006-1544 | 2.29 ppm |
2014-07-01 | 5701-006-1541 | 3.03 ppm |
2014-07-08 | 5701-006-0945 | 4.31 ppm |
2014-07-08 | 5701-007-1000 | 8.43 ppm |
2014-07-14 | 5701-006-1403 | 4.60 ppm |
2014-07-21 | 5701-006-1315 | 5.34 ppm |
2014-07-29 | 5701-006-1410 | 4.40 ppm |
2014-08-05 | 5701-006-0906 | 6.72 ppm |
2014-08-11 | 5701-002-1550 | 5.11 ppm |
2014-08-11 | 5701-005-0840 | 7.05 ppm |
2014-08-11 | 5701-006-1524 | 5.79 ppm |
2014-08-11 | 5701-008-1534 | 4.44 ppm |
2014-08-18 | 5701-006-1630 | 6.21 ppm |
2014-09-10 | 5701-006-1200 | 6.42 ppm |
2014-09-15 | 5701-006-1255 | 8.12 ppm |
2014-09-15 | 5701-017-0810 | 2.92 ppm |
2014-10-29 | 5701-006-0830 | 6.97 ppm |
2014-11-12 | 5701-006-1459 | 7.02 ppm |
2014-11-18 | 5701-006-0937 | 7.19 ppm |
2014-11-19 | 5701-002-0946 | 5.10 ppm |
2014-11-19 | 5701-008-1104 | 5.11 ppm |
2014-11-24 | 5701-006-0907 | 8.40 ppm |
2014-12-03 | 5701-006-1154 | 8.61 ppm |
2014-12-08 | 5701-006-1504 | 8.81 ppm |
2014-12-16 | 5701-006-1432 | 6.87 ppm |
2014-12-16 | 5701-017-1502 | 3.49 ppm |
2014-12-17 | 5701-003-1030 | 9.55 ppm |
2014-12-17 | 5701-005-1558 | 7.65 ppm |
2014-12-17 | 5701-007-1102 | 8.20 ppm |
2014-12-22 | 5701-006-0900 | 6.63 ppm |
2014-12-30 | 1395-004-1123 | 8.81 ppm |
2015-01-05 | 5810-006-1340 | 4.07 ppm |
2015-01-13 | 5701-006-1435 | 3.62 ppm |
2015-01-20 | 5701-006-1310 | 3.43 ppm |
2015-01-27 | 5701-007-1447 | 8.04 ppm |
2015-01-28 | 5701-006-0918 | 3.19 ppm |
2015-02-03 | 5701-006-0934 | 3.73 ppm |
2015-02-09 | 5701-006-1329 | 3.35 ppm |
2015-02-11 | 5810-002-1343 | 5.20 ppm |
2015-02-11 | 5810-006-1003 | 4.52 ppm |
2015-02-17 | 5701-006-1330 | 3.43 ppm |
2015-02-18 | 5701-008-1000 | 5.49 ppm |
2015-02-18 | 5701-017-1402 | 2.63 ppm |
2015-02-23 | 5701-006-0910 | 4.08 ppm |
2015-03-02 | 5701-006-1405 | 2.44 ppm |
2015-03-11 | 5701-005-0855 | 7.63 ppm |
2015-03-11 | 5701-006-1554 | 7.27 ppm |
2015-03-16 | 5701-007-1408 | 7.39 ppm |
2015-03-18 | 5701-006-0811 | 7.61 ppm |
2015-03-31 | 5701-003-1050 | 9.80 ppm |
2015-03-31 | 5701-006-0830 | 6.62 ppm |
2015-03-31 | 5701-009-1108 | 4.06 ppm |
2015-04-06 | 5701-006-1345 | 6.65 ppm |
2015-04-15 | 5701-007-1443 | 6.88 ppm |
2015-04-20 | 5701-006-1542 | 6.57 ppm |
2015-04-28 | 5701-006-1415 | 7.08 ppm |
2015-05-05 | 5701-007-1100 | 8.18 ppm |
2015-05-11 | 5810-005-1356 | 7.00 ppm |
2015-05-11 | 5701-008-1345 | 4.58 ppm |
2015-05-19 | 5701-006-1543 | 6.82 ppm |
2015-06-08 | 5701-007-1254 | 7.73 ppm |
2015-08-03 | 5701-017-0904 | 2.77 ppm |
2015-08-12 | 5701-002-1320 | 5.25 ppm |
2015-09-16 | 5701-019-1125 | 2.76 ppm |
2015-10-13 | 5701-010-1413 | 5.15 ppm |
2015-10-13 | 5701-019-1403 | 3.07 ppm |
2015-11-03 | 5701-002-1333 | 5.26 ppm |
2015-11-03 | 5701-010-1332 | 5.66 ppm |
2015-11-03 | 5701-017-1438 | 3.42 ppm |
2015-11-03 | 5701-019-1437 | 3.43 ppm |
2015-12-16 | 5810-004-0946 | ND |
2015-12-16 | 5701-009-0856 | 3.63 ppm |
2015-12-21 | 5701-010-1351 | 5.97 ppm |
2015-12-21 | 5701-019-1411 | 3.15 ppm |
2015-12-22 | 5701-008-1042 | 4.13 ppm |
2016-01-12 | 5701-010-1125 | 5.68 ppm |
2016-01-12 | 5701-019-1135 | 2.98 ppm |
2016-01-20 | 5701-008-0935 | 4.46 ppm |
2016-01-20 | 5701-015-0936 | ND |
2016-02-03 | 5701-008-0922 | 4.97 ppm |
2016-02-03 | 5701-015-0923 | 6.70 ppm |
2016-02-03 | 5701-017-1114 | 9.06 ppm |
2016-02-03 | 5701-019-1113 | 3.15 ppm |
2016-02-09 | 5701-002-1013 | 5.48 ppm |
2016-02-09 | 5701-010-1015 | 5.95 ppm |
2016-02-16 | 5701-017-1125 | 3.88 ppm |
2016-02-16 | 5701-019-1127 | 3.46 ppm |
2016-03-14 | 5810-008-1402 | 5.00 ppm |
2016-03-14 | 5701-010-1310 | 4.45 ppm |
2016-03-14 | 5701-015-1414 | 4.33 ppm |
2016-04-05 | 5701-010-0914 | 5.37 ppm |
2016-04-05 | 5701-015-1051 | 4.28 ppm |
2016-05-23 | 5701-002-0937 | 5.32 ppm |
2016-05-23 | 5701-008-0816 | 4.28 ppm |
2016-05-23 | 5701-010-0938 | 5.41 ppm |
2016-05-23 | 5701-015-0810 | 3.98 ppm |
2016-05-23 | 5701-017-1441 | 4.58 ppm |
2016-05-23 | 5701-019-1440 | 3.95 ppm |
2016-06-13 | 9590-020-1700 | 1.10 ppm |
2016-06-22 | 5701-003-1105 | 9.57 ppm |
2016-06-22 | 5701-004-1420 | 9.92 ppm |
2016-06-22 | 5701-006-1545 | 6.09 ppm |
2016-06-22 | 5701-007-1010 | 7.41 ppm |
2016-06-22 | 5701-009-1145 | 4.23 ppm |
2016-06-22 | 5701-010-1440 | 6.10 ppm |
2016-06-22 | 5701-015-1430 | 5.29 ppm |
2016-06-22 | 5701-019-1330 | 4.40 ppm |
2016-07-13 | 5701-010-1258 | 5.23 ppm |
2016-07-13 | 5701-015-1202 | 3.96 ppm |
2016-07-13 | 5701-019-1400 | 4.36 ppm |
2016-08-24 | 5701-002-1518 | 5.39 ppm |
2016-08-24 | 5701-008-1508 | 5.07 ppm |
2016-08-24 | 5701-010-1517 | 5.61 ppm |
2016-08-24 | 5701-015-1504 | 4.62 ppm |
2016-08-24 | 5701-017-1509 | 5.10 ppm |
2016-08-24 | 5701-019-1507 | 4.62 ppm |
2016-09-12 | 5701-010-1345 | 3.85 ppm |
2016-09-12 | 5701-015-1330 | 4.56 ppm |
2016-09-12 | 5810-017-1415 | 4.40 ppm |
2016-09-12 | 5701-019-1423 | 4.36 ppm |
2016-10-04 | 5701-010-1430 | 5.93 ppm |
2016-10-04 | 5701-015-1350 | 5.09 ppm |
2016-10-04 | 5701-019-1408 | 4.61 ppm |
2016-11-09 | 5701-002-1437 | 5.35 ppm |
2016-11-09 | 5701-008-1428 | 6.14 ppm |
2016-11-09 | 5701-010-1438 | 5.33 ppm |
2016-11-09 | 5701-015-1429 | 5.27 ppm |
2016-11-09 | 5701-017-1426 | 4.59 ppm |
2016-11-09 | 5701-019-1428 | 3.34 ppm |
2016-12-14 | 5701-010-1432 | 5.51 ppm |
2016-12-14 | 5701-015-1425 | 5.46 ppm |
2016-12-14 | 5701-019-1415 | 3.54 ppm |
2017-01-03 | 1991-010-1450 | 6.01 ppm |
2017-01-03 | 1991-015-1440 | 4.59 ppm |
2017-01-03 | 1991-019-1430 | 4.22 ppm |
2017-02-07 | 5701-002-1625 | 5.43 ppm |
2017-02-07 | 5701-008-1634 | 5.14 ppm |
2017-02-07 | 5701-010-1625 | 4.76 ppm |
2017-02-07 | 5701-015-1635 | 5.37 ppm |
2017-02-07 | 5701-017-1608 | 4.38 ppm |
2017-02-07 | 5701-019-1607 | 4.09 ppm |
2017-03-27 | 5701-010-1556 | 4.50 ppm |
2017-03-27 | 5701-015-1519 | 4.96 ppm |
2017-03-27 | 5701-019-1455 | 4.54 ppm |
2017-04-04 | 5701-010-1100 | 6.46 ppm |
2017-04-04 | 5701-015-1116 | 4.55 ppm |
2017-04-04 | 5701-019-1445 | 4.55 ppm |
2017-05-03 | 5701-002-1539 | 5.55 ppm |
2017-05-03 | 5701-008-1451 | 4.92 ppm |
2017-05-03 | 5701-010-1538 | 6.08 ppm |
2017-05-03 | 5701-015-1450 | 4.97 ppm |
2017-05-03 | 5701-017-1508 | 3.64 ppm |
2017-05-03 | 5701-019-1507 | 3.61 ppm |
2017-06-05 | 5701-010-1448 | 5.66 ppm |
2017-06-05 | 5701-015-1418 | 4.16 ppm |
2017-06-05 | 5701-019-1517 | 3.83 ppm |
2017-06-20 | 5701-004-1430 | 10.2 ppm |
2017-07-05 | 5701-010-1410 | 5.39 ppm |
2017-07-05 | 5701-015-1423 | 3.34 ppm |
2017-07-05 | 5701-019-1354 | 3.96 ppm |
2017-08-08 | 5701-002-1027 | 5.12 ppm |
2017-08-08 | 5701-008-1108 | 3.79 ppm |
2017-08-08 | 5701-010-1028 | 5.37 ppm |
2017-08-08 | 5701-015-1104 | 4.21 ppm |
2017-08-08 | 5701-017-1155 | 5.03 ppm |
2017-08-08 | 5701-019-1154 | 4.98 ppm |
2017-09-12 | 5701-010-1517 | 5.37 ppm |
2017-09-12 | 5701-015-1503 | 4.77 ppm |
2017-09-12 | 5810-017-1454 | 5.10 ppm |
2017-09-12 | 5701-019-1449 | 4.61 ppm |
2017-10-10 | 5701-010-1510 | 5.37 ppm |
2017-10-10 | 5701-015-1456 | 5.05 ppm |
2017-10-10 | 5701-019-1430 | 4.23 ppm |
2017-11-07 | 5701-002-1511 | 5.32 ppm |
2017-11-07 | 5701-008-1518 | 4.91 ppm |
2017-11-07 | 5701-010-1510 | 4.40 ppm |
2017-11-07 | 5701-015-1519 | 5.06 ppm |
2017-11-07 | 5701-017-1452 | 5.19 ppm |
2017-11-07 | 5701-019-1451 | 4.85 ppm |
2017-12-18 | 5701-010-1435 | 5.20 ppm |
2017-12-18 | 5701-015-1506 | 4.59 ppm |
2017-12-18 | 5701-019-1540 | 4.65 ppm |
2017-12-27 | 5810-003-1107 | 9.20 ppm |
2017-12-27 | 5810-004-1200 | 9.30 ppm |
2017-12-27 | 5810-006-1444 | 3.90 ppm |
2017-12-27 | 5810-007-0952 | 6.70 ppm |
2018-01-02 | 5701-010-1555 | 6.03 ppm |
2018-01-02 | 5701-015-1530 | 5.00 ppm |
2018-01-02 | 5701-019-1607 | 4.17 ppm |
2018-02-06 | 5701-002-1315 | 5.56 ppm |
2018-02-06 | 5701-008-1157 | 5.68 ppm |
2018-02-06 | 5701-010-1316 | 5.85 ppm |
2018-02-06 | 5701-015-1156 | 4.40 ppm |
2018-02-06 | 5701-017-1040 | 3.82 ppm |
2018-02-06 | 5701-019-1039 | 4.53 ppm |
2018-03-05 | 5701-010-1340 | 5.19 ppm |
2018-03-05 | 5701-015-1000 | 4.53 ppm |
2018-03-05 | 5701-019-1112 | 4.17 ppm |
2018-04-04 | 5701-010-0910 | 6.19 ppm |
2018-04-04 | 5701-015-1036 | 4.06 ppm |
2018-04-04 | 5701-019-1449 | 4.11 ppm |
2018-05-07 | 5701-002-1404 | 5.54 ppm |
2018-05-07 | 5701-008-1443 | 4.06 ppm |
2018-05-07 | 5701-010-1402 | 4.66 ppm |
2018-05-07 | 5701-015-1444 | 3.79 ppm |
2018-05-07 | 5701-017-1349 | 3.82 ppm |
2018-05-07 | 5701-019-1348 | 4.05 ppm |
2018-06-04 | 5701-004-1606 | 9.64 ppm |
2018-06-04 | 5701-010-1414 | 5.44 ppm |
2018-06-04 | 5701-015-1343 | 3.18 ppm |
2018-06-04 | 5701-019-1358 | 3.96 ppm |
2018-07-10 | 5701-010-1506 | 5.18 ppm |
2018-07-10 | 5701-015-1518 | 3.76 ppm |
2018-07-10 | 5701-019-1450 | 4.30 ppm |
2018-08-13 | 5701-002-1455 | 5.32 ppm |
2018-08-13 | 5701-008-1411 | 4.19 ppm |
2018-08-13 | 5701-010-1456 | 5.26 ppm |
2018-08-13 | 5701-015-1406 | 4.04 ppm |
2018-08-13 | 5701-017-1347 | 4.99 ppm |
2018-08-13 | 5701-019-1346 | 4.68 ppm |
2018-09-13 | 5810-002-1227 | 5.30 ppm |
2018-09-19 | 5701-010-1415 | 5.86 ppm |
2018-09-19 | 5701-015-1324 | 4.76 ppm |
2018-09-19 | 5701-019-1349 | 4.19 ppm |
2018-10-02 | 5701-010-1155 | 6.00 ppm |
2018-10-02 | 5701-015-1333 | 4.53 ppm |
2018-10-02 | 5701-019-1416 | 4.80 ppm |
2018-11-06 | 5701-002-1323 | 5.45 ppm |
2018-11-06 | 5701-008-1350 | 5.42 ppm |
2018-11-06 | 5701-010-1325 | 6.21 ppm |
2018-11-06 | 5701-015-1351 | 4.42 ppm |
2018-11-06 | 5701-017-1410 | 5.78 ppm |
2018-11-06 | 5701-019-1411 | 4.38 ppm |
2018-12-03 | 5701-010-1014 | 4.53 ppm |
2018-12-03 | 5701-015-1043 | 5.32 ppm |
2018-12-03 | 5701-019-0950 | 4.46 ppm |
2019-01-08 | 5701-010-1342 | 5.99 ppm |
2019-01-08 | 5701-015-1420 | 4.79 ppm |
2019-01-08 | 5701-019-1510 | 4.44 ppm |
2019-02-05 | 5701-002-1305 | 5.89 ppm |
2019-02-05 | 5701-008-1500 | 4.36 ppm |
2019-02-05 | 5701-010-1304 | 6.34 ppm |
2019-02-05 | 5701-015-1501 | 4.37 ppm |
2019-02-05 | 5701-017-1529 | 3.89 ppm |
2019-02-05 | 5701-019-1528 | 3.90 ppm |
2019-03-05 | 5701-010-0953 | 6.05 ppm |
2019-03-05 | 5701-015-1039 | 4.19 ppm |
2019-03-05 | 5701-019-1455 | 4.79 ppm |
2019-03-20 | 5810-008-1352 | 3.80 ppm |
2019-04-02 | 2385-010-1057 | 4.10 ppm |
2019-04-02 | 2385-015-0943 | 4.30 ppm |
2019-04-02 | 2385-019-1530 | 4.40 ppm |
2019-05-06 | 5701-002-1011 | 5.68 ppm |
2019-05-06 | 5701-008-0900 | 4.23 ppm |
2019-05-06 | 5701-010-1016 | 4.54 ppm |
2019-05-06 | 5701-015-0857 | 4.20 ppm |
2019-05-06 | 5701-017-1112 | 5.39 ppm |
2019-05-06 | 5701-019-1113 | 4.28 ppm |
2019-06-04 | 5701-004-1340 | 10.7 ppm |
2019-06-04 | 5701-010-1137 | 5.78 ppm |
2019-06-04 | 5701-015-1043 | 4.20 ppm |
2019-06-04 | 5701-019-1044 | 4.64 ppm |
2019-07-09 | 5701-010-1328 | 4.83 ppm |
2019-07-09 | 5701-015-1111 | 4.15 ppm |
2019-07-09 | 5701-019-1406 | 4.37 ppm |
2019-08-06 | 5701-002-0941 | 5.54 ppm |
2019-08-06 | 5701-008-1000 | 3.71 ppm |
2019-08-06 | 5701-010-0942 | 4.60 ppm |
2019-08-06 | 5701-015-1004 | 4.12 ppm |
2019-08-06 | 5701-017-1135 | 4.54 ppm |
2019-08-06 | 5701-019-1136 | 4.13 ppm |
2019-09-10 | 5701-010-1115 | 5.93 ppm |
2019-09-10 | 5701-015-1147 | 4.09 ppm |
2019-09-10 | 5701-019-1245 | 4.29 ppm |
2019-10-07 | 5701-010-1320 | 5.85 ppm |
2019-10-07 | 5701-015-1406 | 4.20 ppm |
2019-10-07 | 5701-019-1445 | 4.34 ppm |
2019-11-06 | 5701-002-1057 | 5.53 ppm |
2019-11-06 | 5701-008-1334 | 5.44 ppm |
2019-11-06 | 5701-010-1058 | 5.08 ppm |
2019-11-06 | 5701-015-1335 | 4.41 ppm |
2019-11-06 | 5701-017-1422 | 4.20 ppm |
2019-11-06 | 5701-019-1421 | 4.66 ppm |
2019-12-02 | 5701-010-1134 | 6.12 ppm |
2019-12-02 | 5701-015-1453 | 4.82 ppm |
2019-12-02 | 5701-019-1554 | 4.13 ppm |