Perfluorooctane sulfonate (PFOS)
City of Corona
Perfluorooctane sulfonate (PFOS) is a member of a group of perfluorinated chemicals used in many consumer products. PFOS and other perfluorinated chemicals can cause serious health effects, including cancer, endocrine disruption, accelerated puberty, liver and immune system damage, and thyroid changes. These chemicals are persistent in the environment and they accumulate in people. Click here to read more about perfluorinated chemicals.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2013 | 4.30 ppt | 10 | 1 | ND - 43.0 ppt |
2014 | 6.60 ppt | 20 | 3 | ND - 46.0 ppt |
2015 | N/A | 0 | 0 | N/A |
2016 | N/A | 0 | 0 | N/A |
2017 | 10.9 ppt | 31 | 4 | ND - 120.0 ppt |
2018 | 22.6 ppt | 112 | 40 | ND - 200.0 ppt |
2019 | 27.0 ppt | 106 | 66 | ND - 210.0 ppt |
ppt = parts per trillion
State and national drinking water standards and health guidelines
EWG Health Guideline 1 ppt
The EWG Health Guideline of 1 ppt for PFOS was defined by EWG based on studies by Phillipe Grandjean of Harvard University and many other independent researchers who found reduced effectiveness of vaccines and adverse impacts on mammary gland development from exposure to PFOA and PFOS, the two PFAS most widely detected in drinking water. This health guideline applies to the entire class of PFAS detected in water.
EPA Maximum Contaminant
Level (MCL) 4 ppt
ppt = parts per trillion
All test results
Date | Lab ID | Result |
---|---|---|
2013-10-09 | 201310100242AM | ND |
2013-10-09 | 201310100236AM | ND |
2013-10-09 | 201310100240AM | ND |
2013-10-09 | 201310100238AM | ND |
2013-10-09 | 201310100234AM | ND |
2013-10-23 | 201310240246AM | 43.0 ppt |
2013-10-23 | 201310240240AM | ND |
2013-10-23 | 201310240242AM | ND |
2013-10-23 | 201310240244AM | ND |
2013-10-23 | 201310240252AM | ND |
2014-01-15 | 201401150769AM | ND |
2014-01-15 | 201401150773AM | ND |
2014-01-15 | 201401150771AM | ND |
2014-01-16 | 201401170062AM | 41.0 ppt |
2014-01-16 | 201401170060AM | 45.0 ppt |
2014-04-09 | 201404090857AM | ND |
2014-04-09 | 201404090855AM | ND |
2014-04-09 | 201404090853AM | ND |
2014-04-09 | 201404090851AM | ND |
2014-04-09 | 201404090849AM | ND |
2014-04-17 | 201404180150AM | ND |
2014-04-17 | 201404180148AM | ND |
2014-04-22 | 201404220789AM | ND |
2014-04-24 | 201404240697AM | ND |
2014-04-24 | 201404240693AM | ND |
2014-07-10 | 201407100758AM | 46.0 ppt |
2014-07-10 | 201407100756AM | ND |
2014-07-10 | 201407100762AM | ND |
2014-07-10 | 201407100760AM | ND |
2014-07-15 | 201407150791AM | ND |
2017-11-15 | 9590-034-0900 | ND |
2017-11-15 | 9590-036-0940 | ND |
2017-11-15 | 9590-041-1430 | ND |
2017-11-15 | 9590-044-1100 | ND |
2017-11-15 | 9590-045-1300 | ND |
2017-11-15 | 9590-046-1310 | ND |
2017-11-15 | 9590-057-1030 | ND |
2017-11-15 | 9590-058-1040 | ND |
2017-11-15 | 9590-059-0950 | ND |
2017-12-06 | 9590-014-1400 | ND |
2017-12-06 | 9590-015-1350 | ND |
2017-12-06 | 9590-019-0920 | ND |
2017-12-06 | 9590-023-0830 | ND |
2017-12-06 | 9590-024-1310 | ND |
2017-12-06 | 9590-027-1300 | ND |
2017-12-06 | 9590-029-1430 | ND |
2017-12-06 | 9590-030-1220 | 68.0 ppt |
2017-12-06 | 9590-031-1230 | 87.0 ppt |
2017-12-06 | 9590-032-1250 | 64.0 ppt |
2017-12-06 | 9590-033-1210 | 120.0 ppt |
2017-12-06 | 9590-038-1500 | ND |
2017-12-06 | 9590-039-1330 | ND |
2017-12-06 | 9590-043-1540 | ND |
2017-12-06 | 9590-049-0850 | ND |
2017-12-06 | 9590-056-1415 | ND |
2017-12-19 | 9590-041-1050 | ND |
2017-12-19 | 9590-044-1320 | ND |
2017-12-19 | 9590-057-1410 | ND |
2017-12-19 | 9590-058-1420 | ND |
2017-12-19 | 9590-059-1500 | ND |
2017-12-19 | 9590-064-1030 | ND |
2018-01-24 | 9590-034-0800 | ND |
2018-01-24 | 9590-036-1440 | ND |
2018-01-24 | 9590-045-1010 | ND |
2018-01-24 | 9590-046-1020 | ND |
2018-03-07 | 9590-014-1500 | ND |
2018-03-07 | 9590-015-1610 | ND |
2018-03-07 | 9590-024-1130 | 40.0 ppt |
2018-03-07 | 9590-027-1115 | 41.0 ppt |
2018-03-07 | 9590-029-1520 | ND |
2018-03-07 | 9590-030-1000 | 82.0 ppt |
2018-03-07 | 9590-031-1040 | 73.0 ppt |
2018-03-07 | 9590-032-1100 | 76.0 ppt |
2018-03-07 | 9590-033-1020 | 160.0 ppt |
2018-03-07 | 9590-038-1450 | ND |
2018-03-07 | 9590-039-1140 | ND |
2018-03-07 | 9590-049-0935 | ND |
2018-03-07 | 9590-056-1545 | ND |
2018-03-08 | 9590-034-0820 | ND |
2018-03-08 | 9590-036-0920 | ND |
2018-03-08 | 9590-041-1450 | ND |
2018-03-08 | 9590-044-1320 | ND |
2018-03-08 | 9590-045-1100 | ND |
2018-03-08 | 9590-046-1120 | ND |
2018-03-08 | 9590-057-1000 | ND |
2018-03-08 | 9590-058-1020 | ND |
2018-03-08 | 9590-059-0940 | ND |
2018-03-08 | 9590-064-1420 | ND |
2018-03-21 | 9590-019-0920 | ND |
2018-04-30 | 9590-055-1630 | ND |
2018-06-19 | 9590-034-0830 | ND |
2018-06-19 | 9590-036-1250 | ND |
2018-06-19 | 9590-041-1120 | ND |
2018-06-19 | 9590-044-1050 | ND |
2018-06-19 | 9590-045-1400 | ND |
2018-06-19 | 9590-046-1420 | ND |
2018-06-19 | 9590-057-1320 | ND |
2018-06-19 | 9590-058-1330 | ND |
2018-06-19 | 9590-059-1300 | ND |
2018-06-19 | 9590-064-1030 | ND |
2018-06-20 | 9590-014-1200 | ND |
2018-06-20 | 9590-015-1210 | ND |
2018-06-20 | 9590-019-1355 | ND |
2018-06-20 | 9590-021-1000 | 49.0 ppt |
2018-06-20 | 9590-024-1050 | 42.0 ppt |
2018-06-20 | 9590-027-1030 | 48.0 ppt |
2018-06-20 | 9590-029-1610 | ND |
2018-06-20 | 9590-030-0900 | 100.0 ppt |
2018-06-20 | 9590-031-0940 | 110.0 ppt |
2018-06-20 | 9590-032-1015 | 80.0 ppt |
2018-06-20 | 9590-033-0920 | 170.0 ppt |
2018-06-20 | 9590-038-1450 | ND |
2018-06-20 | 9590-039-1130 | ND |
2018-06-20 | 9590-043-1510 | ND |
2018-06-20 | 9590-049-1430 | ND |
2018-06-20 | 9590-055-1110 | ND |
2018-06-20 | 9590-056-1630 | ND |
2018-09-18 | 9590-034-1430 | ND |
2018-09-18 | 9590-036-1405 | ND |
2018-09-18 | 9590-041-1305 | ND |
2018-09-18 | 9590-044-0945 | ND |
2018-09-18 | 9590-045-1015 | ND |
2018-09-18 | 9590-046-1010 | ND |
2018-09-18 | 9590-057-1100 | ND |
2018-09-18 | 9590-058-1105 | ND |
2018-09-18 | 9590-059-1410 | ND |
2018-09-18 | 9590-064-0900 | ND |
2018-09-19 | 9590-014-1550 | ND |
2018-09-19 | 9590-019-1400 | ND |
2018-09-19 | 9590-021-0850 | 46.0 ppt |
2018-09-19 | 9590-024-1130 | ND |
2018-09-19 | 9590-027-0910 | 49.0 ppt |
2018-09-19 | 9590-029-1610 | ND |
2018-09-19 | 9590-030-1100 | 120.0 ppt |
2018-09-19 | 9590-031-1000 | 120.0 ppt |
2018-09-19 | 9590-032-0945 | 79.0 ppt |
2018-09-19 | 9590-033-1040 | 150.0 ppt |
2018-09-19 | 9590-038-1530 | ND |
2018-09-19 | 9590-039-1610 | ND |
2018-09-19 | 9590-043-1455 | ND |
2018-09-19 | 9590-049-1335 | ND |
2018-09-19 | 9590-055-1600 | ND |
2018-09-19 | 9590-056-1620 | ND |
2018-11-08 | 9590-015-1230 | ND |
2018-11-15 | 9590-072-1500 | 65.0 ppt |
2018-12-12 | 9590-014-1020 | ND |
2018-12-12 | 9590-015-1120 | 16.0 ppt |
2018-12-12 | 9590-019-0840 | 5.10 ppt |
2018-12-12 | 9590-021-1350 | 54.0 ppt |
2018-12-12 | 9590-024-1230 | 38.0 ppt |
2018-12-12 | 9590-027-1250 | 35.0 ppt |
2018-12-12 | 9590-029-1040 | ND |
2018-12-12 | 9590-030-1520 | 130.0 ppt |
2018-12-12 | 9590-031-1430 | 130.0 ppt |
2018-12-12 | 9590-032-1310 | 84.0 ppt |
2018-12-12 | 9590-033-1450 | 200.0 ppt |
2018-12-12 | 9590-038-1000 | ND |
2018-12-12 | 9590-039-1130 | 10.00 ppt |
2018-12-12 | 9590-043-0920 | ND |
2018-12-12 | 9590-049-0820 | ND |
2018-12-12 | 9590-055-1200 | 28.0 ppt |
2018-12-12 | 9590-056-1100 | 16.0 ppt |
2018-12-18 | 9590-034-0740 | ND |
2018-12-18 | 9590-036-1100 | 2.00 ppt |
2018-12-18 | 9590-041-1540 | ND |
2018-12-18 | 9590-044-1400 | 3.20 ppt |
2018-12-18 | 9590-045-1430 | 3.90 ppt |
2018-12-18 | 9590-046-1440 | 4.20 ppt |
2018-12-18 | 9590-057-1500 | 6.50 ppt |
2018-12-18 | 9590-058-1510 | 6.40 ppt |
2018-12-18 | 9590-059-1110 | ND |
2018-12-18 | 9590-064-1010 | 5.30 ppt |
2018-12-18 | 9590-072-1600 | 48.0 ppt |
2019-03-13 | 9590-015-1140 | 19.0 ppt |
2019-03-13 | 9590-019-0940 | 2.80 ppt |
2019-03-13 | 9590-021-1340 | 48.0 ppt |
2019-03-13 | 9590-024-1430 | 41.0 ppt |
2019-03-13 | 9590-027-1420 | 36.0 ppt |
2019-03-13 | 9590-029-1120 | ND |
2019-03-13 | 9590-030-0820 | 120.0 ppt |
2019-03-13 | 9590-031-0740 | 110.0 ppt |
2019-03-13 | 9590-032-1410 | 81.0 ppt |
2019-03-13 | 9590-033-0800 | 210.0 ppt |
2019-03-13 | 9590-039-1450 | 17.0 ppt |
2019-03-13 | 9590-049-0930 | ND |
2019-03-13 | 9590-055-1440 | 22.0 ppt |
2019-03-13 | 9590-056-1130 | 20.0 ppt |
2019-03-13 | 9590-067-1520 | ND |
2019-03-19 | 9590-034-0640 | ND |
2019-03-19 | 9590-036-1430 | 2.60 ppt |
2019-03-19 | 9590-041-0720 | ND |
2019-03-19 | 9590-044-0840 | 5.60 ppt |
2019-03-19 | 9590-045-1330 | ND |
2019-03-19 | 9590-046-1340 | ND |
2019-03-19 | 9590-057-0740 | 7.30 ppt |
2019-03-19 | 9590-058-0750 | 7.50 ppt |
2019-03-19 | 9590-059-1440 | ND |
2019-03-19 | 9590-064-1050 | ND |
2019-03-19 | 9590-072-1120 | 15.0 ppt |
2019-04-17 | 9590-014-1400 | ND |
2019-04-17 | 9590-043-1345 | ND |
2019-05-01 | 9590-014-1055 | ND |
2019-05-01 | 9590-015-1120 | 22.0 ppt |
2019-05-01 | 9590-019-0950 | 3.80 ppt |
2019-05-01 | 9590-021-1350 | 53.0 ppt |
2019-05-01 | 9590-024-1510 | 42.0 ppt |
2019-05-01 | 9590-027-1500 | 41.0 ppt |
2019-05-01 | 9590-029-1030 | ND |
2019-05-01 | 9590-030-0850 | 150.0 ppt |
2019-05-01 | 9590-031-0800 | 130.0 ppt |
2019-05-01 | 9590-032-1440 | 120.0 ppt |
2019-05-01 | 9590-033-0820 | 210.0 ppt |
2019-05-01 | 9590-039-1425 | 26.0 ppt |
2019-05-01 | 9590-043-1020 | ND |
2019-05-01 | 9590-049-0920 | ND |
2019-05-01 | 9590-055-0835 | 25.0 ppt |
2019-05-01 | 9590-056-1040 | 25.0 ppt |
2019-05-01 | 9590-067-1410 | ND |
2019-05-01 | 9590-071-0900 | ND |
2019-05-02 | 9590-034-0730 | ND |
2019-05-02 | 9590-036-1500 | 4.50 ppt |
2019-05-02 | 9590-041-1510 | ND |
2019-05-02 | 9590-044-1320 | 3.30 ppt |
2019-05-02 | 9590-045-1400 | 3.40 ppt |
2019-05-02 | 9590-046-1410 | 3.20 ppt |
2019-05-02 | 9590-057-1300 | 7.00 ppt |
2019-05-02 | 9590-058-1310 | 8.20 ppt |
2019-05-02 | 9590-059-1450 | ND |
2019-05-02 | 9590-064-1600 | ND |
2019-05-02 | 9590-072-1530 | 48.0 ppt |
2019-08-27 | 9590-044-1100 | ND |
2019-08-27 | 9590-057-1035 | 7.00 ppt |
2019-08-27 | 9590-058-1045 | 4.50 ppt |
2019-08-27 | 9590-059-1015 | ND |
2019-08-29 | 9590-014-1050 | ND |
2019-08-29 | 9590-015-1034 | 17.0 ppt |
2019-08-29 | 9590-019-1218 | ND |
2019-08-29 | 9590-021-1014 | 58.0 ppt |
2019-08-29 | 9590-024-0930 | 48.0 ppt |
2019-08-29 | 9590-027-0945 | 60.0 ppt |
2019-08-29 | 9590-029-1121 | ND |
2019-08-29 | 9590-039-0840 | 17.0 ppt |
2019-08-29 | 9590-043-1147 | ND |
2019-08-29 | 9590-049-1250 | ND |
2019-08-29 | 9590-056-1110 | 19.0 ppt |
2019-08-29 | 9590-067-1315 | 2.00 ppt |
2019-08-29 | 9590-071-1400 | ND |
2019-09-26 | 9590-038-0755 | ND |
2019-10-17 | 9590-014-1325 | ND |
2019-10-17 | 9590-015-1350 | 20.0 ppt |
2019-10-17 | 9590-019-0940 | 2.60 ppt |
2019-10-17 | 9590-021-1050 | 69.0 ppt |
2019-10-17 | 9590-024-1125 | 55.0 ppt |
2019-10-17 | 9590-027-1115 | 68.0 ppt |
2019-10-17 | 9590-029-1300 | ND |
2019-10-17 | 9590-030-1000 | 140.0 ppt |
2019-10-17 | 9590-031-1040 | 170.0 ppt |
2019-10-17 | 9590-032-1100 | 78.0 ppt |
2019-10-17 | 9590-033-1020 | 210.0 ppt |
2019-10-17 | 9590-034-1135 | 3.80 ppt |
2019-10-17 | 9590-036-0956 | ND |
2019-10-17 | 9590-038-1215 | ND |
2019-10-17 | 9590-039-1155 | 15.0 ppt |
2019-10-17 | 9590-041-0936 | ND |
2019-10-17 | 9590-043-1230 | ND |
2019-10-17 | 9590-044-1100 | 2.20 ppt |
2019-10-17 | 9590-045-1040 | 2.50 ppt |
2019-10-17 | 9590-046-1042 | 2.30 ppt |
2019-10-17 | 9590-049-0930 | ND |
2019-10-17 | 9590-055-1145 | 27.0 ppt |
2019-10-17 | 9590-056-1315 | 22.0 ppt |
2019-10-17 | 9590-057-1016 | 9.20 ppt |
2019-10-17 | 9590-058-1018 | 9.60 ppt |
2019-10-17 | 9590-059-0958 | ND |
2019-10-17 | 9590-064-0912 | ND |
2019-10-17 | 9590-067-0850 | 2.40 ppt |
2019-10-17 | 9590-071-1010 | ND |
2019-10-17 | 9590-072-1119 | 31.0 ppt |
2019-11-13 | 9590-034-0800 | 2.30 ppt |