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EWG's Tap Water Database — 2021 UPDATE

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Dichlorodifluoromethane

San Gabriel Valley Water Company - Fontana

Dichlorodifluoromethane (Freon-12) is a refrigerant, solvent and aerosol propellant banned in 2000 under the Montreal Protocol because of its ozone-depleting properties. Freons can cause heart, nervous system and liver damage.

MORE ABOUT THIS CONTAMINANT

 

1,007

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.304 ppb18968ND - 1.40 ppb
20150.373 ppb16970ND - 1.80 ppb
20160.312 ppb16857ND - 1.40 ppb
20170.325 ppb18762ND - 2.00 ppb
20180.366 ppb16969ND - 1.40 ppb
20190.371 ppb12553ND - 1.70 ppb

ppb = parts per billion

All test results

Date Lab ID Result
2014-01-089588-003-1130ND
2014-01-089588-003-1130ND
2014-01-089588-015-0905ND
2014-01-089588-025-0855ND
2014-01-089588-043-0910ND
2014-01-089588-064-09000.550 ppb
2014-01-109588-001-1045ND
2014-01-109588-001-1045ND
2014-01-109588-063-09300.770 ppb
2014-01-159588-015-10300.540 ppb
2014-01-159588-025-1020ND
2014-01-229588-015-0830ND
2014-01-229588-022-1145ND
2014-01-229588-022-1145ND
2014-01-229588-023-1030ND
2014-01-229588-023-1030ND
2014-01-229588-025-0810ND
2014-01-229588-028-1110ND
2014-01-229588-028-1110ND
2014-01-299588-015-00000.610 ppb
2014-01-299588-025-0000ND
2014-02-059588-015-08300.630 ppb
2014-02-059588-025-0820ND
2014-02-059588-043-0835ND
2014-02-059588-063-08000.750 ppb
2014-02-059588-064-08250.730 ppb
2014-02-129588-015-0925ND
2014-02-129588-025-0920ND
2014-02-199588-015-08300.650 ppb
2014-02-199588-025-0800ND
2014-02-269588-015-07250.840 ppb
2014-02-269588-025-0720ND
2014-03-059588-015-09301.30 ppb
2014-03-059588-020-1120ND
2014-03-059588-020-1120ND
2014-03-059588-025-0920ND
2014-03-059588-043-0935ND
2014-03-059588-063-09051.10 ppb
2014-03-059588-064-09251.000 ppb
2014-03-139588-015-09400.930 ppb
2014-03-139588-025-0935ND
2014-03-199588-006-0910ND
2014-03-199588-006-0910ND
2014-03-199588-007-1000ND
2014-03-199588-015-08400.520 ppb
2014-03-199588-025-0835ND
2014-03-269588-011-0900ND
2014-03-269588-011-0900ND
2014-03-269588-015-0815ND
2014-03-269588-025-0805ND
2014-04-029588-015-09100.870 ppb
2014-04-029588-025-0900ND
2014-04-029588-043-0915ND
2014-04-029588-063-08400.660 ppb
2014-04-029588-064-09050.850 ppb
2014-04-099588-015-0830ND
2014-04-099588-025-0820ND
2014-04-169588-015-0820ND
2014-04-169588-025-0815ND
2014-04-169588-043-0850ND
2014-04-169588-044-1100ND
2014-04-169588-045-1010ND
2014-04-169588-064-09201.000 ppb
2014-04-169588-064-0920ND
2014-04-179588-014-0835ND
2014-04-179588-014-0835ND
2014-04-179588-031-0745ND
2014-04-179588-031-0745ND
2014-04-239588-015-08001.20 ppb
2014-04-239588-025-0830ND
2014-04-309588-015-08100.590 ppb
2014-04-309588-025-0830ND
2014-05-079588-015-07500.560 ppb
2014-05-079588-025-0800ND
2014-05-149588-015-10400.790 ppb
2014-05-149588-025-1015ND
2014-05-149588-043-1030ND
2014-05-149588-063-09451.20 ppb
2014-05-149588-064-10200.870 ppb
2014-05-219588-015-07401.20 ppb
2014-05-219588-025-07350.550 ppb
2014-05-219588-063-0725ND
2014-05-279588-016-0925ND
2014-05-279588-016-0925ND
2014-05-279588-040-1245ND
2014-05-289588-015-08200.720 ppb
2014-05-289588-025-0810ND
2014-06-049588-015-08050.800 ppb
2014-06-049588-025-0755ND
2014-06-049588-043-0810ND
2014-06-049588-063-07400.720 ppb
2014-06-049588-064-08000.690 ppb
2014-06-109588-037-1000ND
2014-06-109588-038-0850ND
2014-06-109588-038-0850ND
2014-06-119588-015-09350.970 ppb
2014-06-119588-025-0925ND
2014-06-189588-015-07401.000 ppb
2014-06-189588-025-0730ND
2014-06-249588-033-0800ND
2014-06-249588-042-0830ND
2014-06-259588-015-0800ND
2014-06-259588-025-0735ND
2014-07-029588-015-08500.860 ppb
2014-07-029588-025-0840ND
2014-07-029588-043-0855ND
2014-07-029588-063-08200.560 ppb
2014-07-029588-064-08450.660 ppb
2014-07-099588-015-08050.860 ppb
2014-07-099588-025-0800ND
2014-07-099588-065-0850ND
2014-07-099588-067-1100ND
2014-07-099588-067-1100ND
2014-07-099588-068-1000ND
2014-07-099588-068-1000ND
2014-07-169588-015-11250.760 ppb
2014-07-169588-025-1120ND
2014-07-239588-015-08350.670 ppb
2014-07-239588-025-0845ND
2014-07-239588-026-0740ND
2014-07-239588-026-0740ND
2014-07-239588-034-0945ND
2014-07-239588-034-0945ND
2014-07-239588-072-0910ND
2014-07-239588-072-0910ND
2014-07-249588-041-0800ND
2014-07-249588-041-0800ND
2014-07-309588-015-10050.810 ppb
2014-07-309588-025-1000ND
2014-07-319588-024-0740ND
2014-07-319588-024-0740ND
2014-08-069588-015-08550.840 ppb
2014-08-069588-025-0850ND
2014-08-069588-027-1020ND
2014-08-069588-027-1020ND
2014-08-069588-043-0835ND
2014-08-069588-063-0825ND
2014-08-149588-015-08200.560 ppb
2014-08-149588-025-0800ND
2014-08-219588-015-07200.870 ppb
2014-08-219588-025-0710ND
2014-08-279588-015-11050.820 ppb
2014-08-279588-025-1120ND
2014-09-029588-015-08300.760 ppb
2014-09-029588-025-0750ND
2014-09-029588-043-08400.660 ppb
2014-09-029588-063-07300.780 ppb
2014-09-089588-015-11200.920 ppb
2014-09-089588-025-1115ND
2014-09-159588-015-09550.770 ppb
2014-09-159588-025-0950ND
2014-09-229588-015-09100.840 ppb
2014-09-229588-025-0905ND
2014-09-299588-015-08151.30 ppb
2014-09-299588-025-0810ND
2014-10-069588-015-12100.790 ppb
2014-10-069588-025-1205ND
2014-10-069588-043-12400.690 ppb
2014-10-069588-063-11500.630 ppb
2014-10-149588-015-09050.730 ppb
2014-10-149588-025-0900ND
2014-10-209588-015-11400.630 ppb
2014-10-209588-025-1130ND
2014-10-279588-015-08050.960 ppb
2014-10-279588-025-0800ND
2014-11-039588-015-0835ND
2014-11-039588-025-0830ND
2014-11-039588-043-08401.10 ppb
2014-11-039588-063-08100.870 ppb
2014-11-109588-015-00001.30 ppb
2014-11-109588-025-0000ND
2014-11-109588-064-0000ND
2014-11-179588-015-08301.40 ppb
2014-11-179588-025-0820ND
2014-11-249588-015-08351.30 ppb
2014-11-249588-025-0840ND
2014-12-019588-015-08101.000 ppb
2014-12-019588-025-0805ND
2014-12-019588-043-0815ND
2014-12-019588-063-11150.830 ppb
2014-12-019588-064-08201.10 ppb
2014-12-089588-015-12051.10 ppb
2014-12-089588-025-1200ND
2014-12-159588-015-08301.10 ppb
2014-12-159588-025-0840ND
2014-12-229588-015-09300.720 ppb
2014-12-229588-025-0920ND
2014-12-299588-015-08050.840 ppb
2014-12-299588-025-0815ND
2015-01-059588-015-08401.000 ppb
2015-01-059588-025-0750ND
2015-01-059588-043-08450.920 ppb
2015-01-059588-063-07400.720 ppb
2015-01-129588-015-09050.700 ppb
2015-01-129588-025-0900ND
2015-01-229588-015-08200.770 ppb
2015-01-229588-025-0800ND
2015-01-229588-064-08050.820 ppb
2015-01-309588-001-0815ND
2015-01-309588-001-0815ND
2015-01-309588-003-0915ND
2015-01-309588-003-0915ND
2015-01-309588-011-1050ND
2015-01-309588-011-1050ND
2015-01-309588-015-12300.780 ppb
2015-01-309588-022-0750ND
2015-01-309588-023-0845ND
2015-01-309588-023-0845ND
2015-01-309588-025-1225ND
2015-01-309588-027-1030ND
2015-02-029588-015-08500.740 ppb
2015-02-029588-025-0810ND
2015-02-029588-043-08450.630 ppb
2015-02-029588-063-07500.530 ppb
2015-02-029588-064-08151.20 ppb
2015-02-099588-015-08500.690 ppb
2015-02-099588-025-0840ND
2015-02-179588-015-08201.10 ppb
2015-02-179588-025-0810ND
2015-02-239588-015-09280.780 ppb
2015-02-239588-025-0910ND
2015-02-269588-007-0855ND
2015-02-269588-007-0855ND
2015-02-269588-020-0820ND
2015-02-269588-020-0820ND
2015-02-269588-028-0745ND
2015-03-029588-015-0830ND
2015-03-029588-025-0750ND
2015-03-029588-063-1010ND
2015-03-099588-015-10501.20 ppb
2015-03-099588-025-1040ND
2015-03-129588-031-0800ND
2015-03-129588-044-0900ND
2015-03-129588-045-0740ND
2015-03-169588-015-07351.10 ppb
2015-03-169588-025-07300.540 ppb
2015-03-239588-015-08501.30 ppb
2015-03-239588-025-0845ND
2015-03-239588-043-0810ND
2015-03-239588-064-07501.10 ppb
2015-03-309588-015-07400.940 ppb
2015-03-309588-025-0735ND
2015-04-069588-015-09000.630 ppb
2015-04-069588-025-0810ND
2015-04-069588-043-0855ND
2015-04-069588-064-08500.740 ppb
2015-04-139588-015-11100.910 ppb
2015-04-139588-025-1100ND
2015-04-209588-015-08101.10 ppb
2015-04-209588-025-0800ND
2015-04-279588-015-09201.40 ppb
2015-04-279588-025-0910ND
2015-04-279588-026-0840ND
2015-05-049588-015-08251.80 ppb
2015-05-049588-025-0830ND
2015-05-049588-064-08351.10 ppb
2015-05-119588-015-09450.850 ppb
2015-05-119588-025-0935ND
2015-05-119588-038-1015ND
2015-05-119588-040-1045ND
2015-05-119588-040-1045ND
2015-05-139588-016-1130ND
2015-05-139588-033-0945ND
2015-05-139588-033-0945ND
2015-05-139588-037-1205ND
2015-05-139588-042-0900ND
2015-05-139588-042-0900ND
2015-05-189588-015-10401.10 ppb
2015-05-189588-024-0800ND
2015-05-189588-025-1015ND
2015-05-189588-065-0900ND
2015-05-189588-068-0945ND
2015-05-269588-015-09001.10 ppb
2015-05-269588-025-0810ND
2015-06-019588-015-08451.10 ppb
2015-06-019588-025-0750ND
2015-06-019588-064-07550.920 ppb
2015-06-089588-015-10300.760 ppb
2015-06-089588-025-1010ND
2015-06-109588-067-0730ND
2015-06-159588-015-08500.600 ppb
2015-06-159588-025-0840ND
2015-06-159588-034-0800ND
2015-06-159588-041-0715ND
2015-06-159588-072-0740ND
2015-06-229588-015-08400.720 ppb
2015-06-229588-025-0800ND
2015-06-299588-015-08400.680 ppb
2015-06-299588-025-0800ND
2015-07-099588-015-06250.740 ppb
2015-07-099588-025-0620ND
2015-07-099588-043-06300.650 ppb
2015-07-139588-015-10100.690 ppb
2015-07-139588-025-1000ND
2015-07-209588-015-08350.890 ppb
2015-07-209588-025-0830ND
2015-07-279588-015-08100.670 ppb
2015-07-279588-025-0730ND
2015-08-039588-015-08350.990 ppb
2015-08-039588-025-0825ND
2015-08-039588-043-08400.610 ppb
2015-08-039588-064-08301.10 ppb
2015-08-109588-015-10001.10 ppb
2015-08-109588-025-0920ND
2015-08-179588-015-08500.910 ppb
2015-08-179588-025-0810ND
2015-08-199588-014-1030ND
2015-08-279588-015-08000.950 ppb
2015-08-279588-025-0750ND
2015-08-319588-015-07150.870 ppb
2015-08-319588-025-0710ND
2015-09-089588-015-09400.540 ppb
2015-09-089588-025-0925ND
2015-09-089588-043-0935ND
2015-09-089588-064-09300.640 ppb
2015-09-149588-015-08351.000 ppb
2015-09-149588-025-0800ND
2015-09-219588-015-08100.620 ppb
2015-09-219588-025-0800ND
2015-09-289588-015-09000.660 ppb
2015-09-289588-025-0850ND
2015-10-059588-015-08100.840 ppb
2015-10-059588-025-0800ND
2015-10-059588-043-0815ND
2015-10-059588-064-08051.10 ppb
2015-10-139588-015-09400.840 ppb
2015-10-139588-025-0900ND
2015-10-143761-063-14200.890 ppb
2015-10-199588-015-0835ND
2015-10-199588-025-07401.000 ppb
2015-10-269588-015-08051.40 ppb
2015-10-269588-025-0755ND
2015-10-269588-063-10001.10 ppb
2015-10-269588-063-1000ND
2015-11-029588-015-08151.40 ppb
2015-11-029588-025-0805ND
2015-11-029588-043-0820ND
2015-11-029588-063-07401.20 ppb
2015-11-029588-064-08101.50 ppb
2015-11-099588-015-10250.900 ppb
2015-11-099588-025-1015ND
2015-11-169588-015-08400.660 ppb
2015-11-169588-025-0810ND
2015-11-239588-015-08060.650 ppb
2015-11-239588-025-0800ND
2015-11-309588-015-08050.850 ppb
2015-11-309588-025-0800ND
2015-12-079588-015-08170.660 ppb
2015-12-079588-025-0810ND
2015-12-079588-043-0820ND
2015-12-079588-063-07550.510 ppb
2015-12-079588-064-08150.880 ppb
2015-12-149588-015-0810ND
2015-12-149588-025-0806ND
2015-12-219588-015-0746ND
2015-12-219588-025-0740ND
2015-12-289588-015-0830ND
2015-12-289588-025-0835ND
2016-01-049588-015-0815ND
2016-01-049588-025-0810ND
2016-01-119588-015-0820ND
2016-01-119588-025-0835ND
2016-01-119588-043-0825ND
2016-01-119588-063-0740ND
2016-01-119588-064-08300.630 ppb
2016-01-199588-015-0805ND
2016-01-199588-025-0755ND
2016-01-259588-001-1030ND
2016-01-259588-001-1030ND
2016-01-259588-003-0910ND
2016-01-259588-003-0910ND
2016-01-259588-015-0810ND
2016-01-259588-025-0805ND
2016-02-019588-015-0840ND
2016-02-019588-025-0755ND
2016-02-019588-043-0835ND
2016-02-019588-063-10050.620 ppb
2016-02-019588-064-08300.890 ppb
2016-02-089588-015-0820ND
2016-02-089588-025-0815ND
2016-02-169588-015-0910ND
2016-02-169588-025-0850ND
2016-02-179588-007-0925ND
2016-02-179588-007-0925ND
2016-02-179588-022-0900ND
2016-02-179588-022-0900ND
2016-02-179588-023-0850ND
2016-02-179588-028-0830ND
2016-02-179588-028-0830ND
2016-02-179588-043-1030ND
2016-02-179588-063-10050.660 ppb
2016-02-179588-064-10200.870 ppb
2016-02-229588-015-0820ND
2016-02-229588-025-0740ND
2016-02-299588-015-0820ND
2016-02-299588-025-0800ND
2016-03-089588-015-0830ND
2016-03-089588-025-0740ND
2016-03-089588-043-0800ND
2016-03-089588-063-0730ND
2016-03-089588-064-07500.800 ppb
2016-03-149588-015-0840ND
2016-03-149588-025-0740ND
2016-03-149588-026-1100ND
2016-03-149588-038-0920ND
2016-03-149588-040-0900ND
2016-03-149588-068-0950ND
2016-03-219588-015-0825ND
2016-03-219588-025-0840ND
2016-03-299588-015-0825ND
2016-03-299588-025-0815ND
2016-04-049588-015-09300.860 ppb
2016-04-049588-025-0845ND
2016-04-049588-043-0925ND
2016-04-049588-043-1100ND
2016-04-049588-063-08200.820 ppb
2016-04-049588-064-08301.000 ppb
2016-04-119588-015-08500.660 ppb
2016-04-119588-025-0750ND
2016-04-189588-015-08450.770 ppb
2016-04-189588-025-0912ND
2016-04-259588-015-08150.650 ppb
2016-04-259588-025-0810ND
2016-05-049588-065-0745ND
2016-05-049588-065-0745ND
2016-05-099588-015-09151.000 ppb
2016-05-099588-025-0855ND
2016-05-169588-015-08300.760 ppb
2016-05-169588-025-0810ND
2016-05-169588-067-1020ND
2016-05-239588-015-09150.940 ppb
2016-05-239588-025-0905ND
2016-05-239588-027-0910ND
2016-05-319588-015-09050.520 ppb
2016-05-319588-025-0830ND
2016-06-069588-015-09300.970 ppb
2016-06-069588-025-0920ND
2016-06-069588-043-0935ND
2016-06-069588-063-0800ND
2016-06-069588-064-09250.500 ppb
2016-06-139588-015-11351.000 ppb
2016-06-139588-025-1055ND
2016-06-209588-015-11100.930 ppb
2016-06-209588-025-1010ND
2016-06-239588-033-0950ND
2016-06-239588-042-1010ND
2016-06-279588-015-09151.20 ppb
2016-06-279588-025-0905ND
2016-06-309588-024-0740ND
2016-06-309588-034-0820ND
2016-06-309588-041-0720ND
2016-06-309588-072-0810ND
2016-07-059588-015-08401.20 ppb
2016-07-059588-025-0820ND
2016-07-059588-043-0835ND
2016-07-059588-063-08150.650 ppb
2016-07-059588-064-08501.20 ppb
2016-07-119588-015-10350.970 ppb
2016-07-119588-016-1030ND
2016-07-119588-025-1025ND
2016-07-119588-037-1000ND
2016-07-189588-015-09471.10 ppb
2016-07-189588-025-0942ND
2016-07-259588-015-10400.970 ppb
2016-07-259588-025-0950ND
2016-08-019588-015-08401.20 ppb
2016-08-019588-025-0825ND
2016-08-019588-043-0845ND
2016-08-019588-063-10250.580 ppb
2016-08-019588-064-08351.20 ppb
2016-08-089588-015-09101.10 ppb
2016-08-089588-025-0830ND
2016-08-089588-037-0930ND
2016-08-159588-015-08351.10 ppb
2016-08-159588-025-0815ND
2016-08-229588-015-09050.920 ppb
2016-08-229588-025-0915ND
2016-08-299588-015-09001.000 ppb
2016-08-299588-025-0850ND
2016-09-069588-015-08201.40 ppb
2016-09-069588-025-0810ND
2016-09-069588-063-08050.780 ppb
2016-09-069588-064-08151.20 ppb
2016-09-129588-015-10251.30 ppb
2016-09-129588-025-0955ND
2016-09-199588-015-0825ND
2016-09-199588-025-0745ND
2016-09-269588-015-09451.000 ppb
2016-09-269588-025-0900ND
2016-10-039588-015-08351.20 ppb
2016-10-039588-025-0820ND
2016-10-039588-043-0830ND
2016-10-039588-063-08000.540 ppb
2016-10-039588-064-08250.900 ppb
2016-10-119588-015-10401.10 ppb
2016-10-119588-025-0940ND
2016-10-189588-015-08401.000 ppb
2016-10-189588-025-0755ND
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