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EWG's Tap Water Database — 2021 UPDATE

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Dichlorodifluoromethane

California Water Service - Stockton

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

 

255

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.553 ppb8322ND - 5.41 ppb
20150.603 ppb4313ND - 2.90 ppb
20160.790 ppb2913ND - 2.34 ppb
2017ND390ND
2018ND340ND
2019ND270ND

ppb = parts per billion

All test results

Date Lab ID Result
2014-01-065701-069-0917ND
2014-01-065701-131-0905ND
2014-01-235701-007-1227ND
2014-01-235701-013-1145ND
2014-01-235701-028-1205ND
2014-01-235701-064-1045ND
2014-01-235701-065-1105ND
2014-01-235701-067-1125ND
2014-02-035701-069-0957ND
2014-02-035701-131-0945ND
2014-02-045701-063-10362.19 ppb
2014-02-045701-125-1040ND
2014-02-125701-063-09302.44 ppb
2014-02-125701-125-0937ND
2014-02-205701-062-1115ND
2014-03-045701-069-0715ND
2014-03-045701-131-0726ND
2014-03-115701-063-12382.84 ppb
2014-03-115701-125-1210ND
2014-03-185701-130-1146ND
2014-03-185701-132-1310ND
2014-04-025701-069-0920ND
2014-04-025701-131-0940ND
2014-04-095701-063-12124.52 ppb
2014-04-095701-125-1307ND
2014-04-155701-007-10130.660 ppb
2014-04-155701-013-1210ND
2014-04-155701-018-1232ND
2014-04-155701-028-1150ND
2014-04-155701-065-1624ND
2014-04-155701-067-1130ND
2014-04-299590-018-1015ND
2014-04-299590-018-1150ND
2014-04-305701-050-1319ND
2014-04-305701-052-1020ND
2014-05-065701-069-0930ND
2014-05-065701-131-0947ND
2014-05-135701-063-10002.01 ppb
2014-05-135701-125-09250.740 ppb
2014-05-215701-053-1015ND
2014-05-215701-062-1125ND
2014-06-035701-069-1117ND
2014-06-035701-131-2112ND
2014-06-045701-063-11445.41 ppb
2014-06-045701-125-10593.24 ppb
2014-06-235701-130-0954ND
2014-06-235701-132-1020ND
2014-07-035701-069-1035ND
2014-07-035701-131-1052ND
2014-07-075701-063-09181.87 ppb
2014-07-075701-125-09211.44 ppb
2014-07-225701-007-1532ND
2014-07-225701-013-1512ND
2014-07-225701-028-1026ND
2014-07-225701-065-0914ND
2014-07-225701-067-1001ND
2014-07-305701-029-1140ND
2014-08-125810-069-1325ND
2014-08-125810-131-1340ND
2014-08-135810-063-10291.30 ppb
2014-08-135810-125-09551.20 ppb
2014-08-275701-062-1228ND
2014-09-165701-069-0950ND
2014-09-165701-131-0937ND
2014-09-175701-063-11562.59 ppb
2014-09-175701-125-12002.97 ppb
2014-09-305701-132-1144ND
2014-10-139590-063-15501.20 ppb
2014-10-139590-125-13181.40 ppb
2014-10-275701-028-1330ND
2014-10-275701-065-1150ND
2014-10-275701-067-1208ND
2014-10-295701-007-12401.27 ppb
2014-10-295701-013-1145ND
2014-11-045701-069-0932ND
2014-11-045701-131-0944ND
2014-11-055701-063-10271.17 ppb
2014-11-055701-125-10331.42 ppb
2014-11-185701-062-1332ND
2014-12-095701-063-10501.77 ppb
2014-12-095701-125-10262.28 ppb
2014-12-175701-130-1120ND
2014-12-175701-132-1159ND
2015-01-155701-125-09592.41 ppb
2015-01-225701-054-1244ND
2015-01-285701-013-1154ND
2015-01-285701-065-1205ND
2015-01-285701-067-1140ND
2015-02-125701-125-09422.10 ppb
2015-02-245701-013-1126ND
2015-02-245701-045-1100ND
2015-02-245701-062-1142ND
2015-03-105701-125-13251.81 ppb
2015-04-085701-051-1223ND
2015-04-145701-125-11302.20 ppb
2015-04-155701-065-1035ND
2015-05-129590-125-10201.80 ppb
2015-05-215701-007-16500.610 ppb
2015-05-215701-028-1240ND
2015-05-215701-062-1325ND
2015-06-095701-125-10252.44 ppb
2015-06-165701-055-1406ND
2015-06-165701-058-1535ND
2015-06-165701-069-1030ND
2015-06-165701-131-1040ND
2015-06-165701-132-1348ND
2015-07-145701-125-10151.90 ppb
2015-07-225701-056-1112ND
2015-07-225701-065-1145ND
2015-08-161610-133-1900ND
2015-08-161610-133-1900ND
2015-08-265701-125-13032.90 ppb
2015-08-305701-062-1138ND
2015-09-095701-125-10212.11 ppb
2015-10-155701-060-1235ND
2015-10-155701-125-11501.92 ppb
2015-10-269590-060-1145ND
2015-10-275701-050-1026ND
2015-10-275701-065-0930ND
2015-11-045701-125-11031.90 ppb
2015-11-195810-059-1048ND
2015-11-199590-059-1056ND
2015-12-075701-062-1103ND
2015-12-085701-125-12151.82 ppb
2015-12-095701-018-0535ND
2015-12-099590-018-0553ND
2016-01-135701-125-09491.74 ppb
2016-01-205701-065-1305ND
2016-02-035701-125-12001.70 ppb
2016-02-235701-013-1306ND
2016-02-239590-061-1110ND
2016-02-235701-061-1135ND
2016-02-235701-062-1347ND
2016-03-095701-125-10041.94 ppb
2016-04-125701-125-13042.17 ppb
2016-04-135701-051-1140ND
2016-04-135701-065-1115ND
2016-05-105701-125-10422.34 ppb
2016-05-175701-007-11230.640 ppb
2016-05-175701-028-1107ND
2016-05-175701-062-1144ND
2016-06-145701-125-12351.96 ppb
2016-06-215701-069-1030ND
2016-06-215701-131-1050ND
2016-06-215701-132-1300ND
2016-07-055701-125-14342.02 ppb
2016-07-265701-018-1225ND
2016-08-095810-125-10301.60 ppb
2016-08-305701-062-1410ND
2016-09-135701-125-12261.74 ppb
2016-10-135701-125-13301.70 ppb
2016-11-085701-125-11221.14 ppb
2016-11-165701-062-1150ND
2016-12-065810-015-1014ND
2016-12-145701-125-14062.21 ppb
2017-01-185701-064-1008ND
2017-02-215701-062-1320ND
2017-04-175701-051-1110ND
2017-04-175701-052-1155ND
2017-04-185701-133-1122ND
2017-04-189590-133-1146ND
2017-05-025701-052-1302ND
2017-05-155701-007-1100ND
2017-05-155701-062-1255ND
2017-05-165701-028-1410ND
2017-05-165701-053-1540ND
2017-05-245701-018-1035ND
2017-06-145701-052-1000ND
2017-06-145701-130-1222ND
2017-06-145701-132-1116ND
2017-06-155701-069-1240ND
2017-06-155701-131-1250ND
2017-06-205701-125-1012ND
2017-07-115701-052-1230ND
2017-07-115701-125-1511ND
2017-07-129590-133-1420ND
2017-07-139590-029-1354ND
2017-07-255701-029-1014ND
2017-07-255701-133-1420ND
2017-08-025701-052-1310ND
2017-08-085701-125-1143ND
2017-08-175701-062-1135ND
2017-09-065701-052-1429ND
2017-09-075701-125-1344ND
2017-10-109590-058-0950ND
2017-10-109590-133-1110ND
2017-10-115701-052-1020ND
2017-10-125701-125-1200ND
2017-10-165701-133-1115ND
2017-11-065701-125-1521ND
2017-11-085810-052-0930ND
2017-11-285701-062-0955ND
2017-11-285701-067-1033ND
2017-12-055701-125-1100ND
2018-01-029590-054-1115ND
2018-01-035701-125-1132ND
2018-01-039590-133-0950ND
2018-01-245701-133-1520ND
2018-02-065701-125-1001ND
2018-02-205701-045-1000ND
2018-02-205701-062-1320ND
2018-04-059590-133-1320ND
2018-04-119590-050-1225ND
2018-04-119590-051-1340ND
2018-04-119590-133-1035ND
2018-05-085701-007-1040ND
2018-05-085701-054-1140ND
2018-05-085701-062-1115ND
2018-05-095701-125-1054ND
2018-06-145810-059-1510ND
2018-06-145810-060-1515ND
2018-06-145810-069-1340ND
2018-06-145810-131-1355ND
2018-06-265701-055-1205ND
2018-06-265701-058-1040ND
2018-06-265701-125-1121ND
2018-06-265701-132-1505ND
2018-07-099590-056-1305ND
2018-07-099590-133-1100ND
2018-07-105810-125-1230ND
2018-07-175701-056-1210ND
2018-07-175701-133-1350ND
2018-08-165701-062-1015ND
2018-10-099590-133-1325ND
2018-10-165810-133-1155ND
2018-10-245810-050-1425ND
2018-11-075701-125-1039ND
2018-11-265810-062-1305ND
2019-01-029590-133-1301ND
2019-01-225810-061-1012ND
2019-01-225810-133-1200ND
2019-02-125701-051-1335ND
2019-02-149590-061-1430ND
2019-02-265810-062-1150ND
2019-04-029590-133-1235ND
2019-04-155810-050-1335ND
2019-04-155810-133-1155ND
2019-04-175701-051-1305ND
2019-04-239590-053-1145ND
2019-05-089590-007-1120ND
2019-05-215701-007-1120ND
2019-05-215701-028-1000ND
2019-05-215701-062-1100ND
2019-06-175701-069-0945ND
2019-06-175701-131-1030ND
2019-06-195701-132-1020ND
2019-07-099590-133-1400ND
2019-07-165701-133-1335ND
2019-08-145701-062-1238ND
2019-10-019590-067-1150ND
2019-10-029590-028-1300ND
2019-10-099590-133-1059ND
2019-10-155701-133-1220ND
2019-11-065701-125-1330ND
2019-11-205701-062-1332ND