Dichloroacetic acid
California American Water Company - Monterey
Dichloroacetic acid, one of the group of five haloacetic acids regulated by federal standards, is formed when chlorine or other disinfectants are used to treat drinking water. Haloacetic acids and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.
262
Samples
0
Samples exceeding legal limit (MCL)
212
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | 6.12 ppb | 26 | 26 | 3.00 ppb - 19.0 ppb |
| 2015 | 4.60 ppb | 56 | 36 | ND - 19.0 ppb |
| 2016 | 7.71 ppb | 44 | 38 | ND - 21.7 ppb |
| 2017 | 8.46 ppb | 45 | 45 | 1.000 ppb - 20.8 ppb |
| 2018 | 5.66 ppb | 45 | 30 | ND - 14.5 ppb |
| 2019 | 4.33 ppb | 46 | 37 | ND - 12.7 ppb |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 0.2 ppb
The EWG Health Guideline of 0.2 ppb for dichloroacetic acid was proposed in 2020 by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk.a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-03-26 | 1225-814-1310 | 19.0 ppb |
| 2014-06-13 | 1225-803-1406 | 6.80 ppb |
| 2014-06-13 | 1225-807-1350 | 4.70 ppb |
| 2014-06-13 | 1225-809-1322 | 8.90 ppb |
| 2014-06-13 | 1225-810-1414 | 6.00 ppb |
| 2014-06-13 | 1225-811-1432 | 8.00 ppb |
| 2014-06-13 | 1225-812-1516 | 5.90 ppb |
| 2014-06-13 | 1225-813-1330 | 8.30 ppb |
| 2014-06-27 | 1225-814-1535 | 4.90 ppb |
| 2014-09-08 | 1225-803-1030 | 6.10 ppb |
| 2014-09-08 | 1225-807-1014 | 3.70 ppb |
| 2014-09-08 | 1225-809-1239 | 5.70 ppb |
| 2014-09-08 | 1225-810-1040 | 5.10 ppb |
| 2014-09-08 | 1225-811-1137 | 7.90 ppb |
| 2014-09-10 | 1225-812-1254 | 3.00 ppb |
| 2014-09-10 | 1225-813-1240 | 5.40 ppb |
| 2014-09-10 | 1225-814-1150 | 5.00 ppb |
| 2014-12-08 | 1225-803-1131 | 3.30 ppb |
| 2014-12-08 | 1225-807-1115 | 3.50 ppb |
| 2014-12-08 | 1225-809-1015 | 4.80 ppb |
| 2014-12-08 | 1225-810-1141 | 3.70 ppb |
| 2014-12-08 | 1225-811-1225 | 6.10 ppb |
| 2014-12-09 | 1225-812-1235 | 3.80 ppb |
| 2014-12-09 | 1225-813-1300 | 4.60 ppb |
| 2014-12-11 | 1225-814-1115 | 11.8 ppb |
| 2014-12-23 | 1225-085-0915 | 3.10 ppb |
| 2015-01-28 | 1225-070-1025 | 5.50 ppb |
| 2015-02-09 | 1225-070-1150 | 3.40 ppb |
| 2015-02-10 | 1225-085-1330 | 3.60 ppb |
| 2015-03-16 | 1225-803-1042 | 8.90 ppb |
| 2015-03-16 | 1225-807-1015 | 7.40 ppb |
| 2015-03-16 | 1225-809-1311 | 7.70 ppb |
| 2015-03-16 | 1225-810-1055 | 6.70 ppb |
| 2015-03-16 | 1225-811-1210 | 9.10 ppb |
| 2015-03-17 | 1225-814-1115 | 14.6 ppb |
| 2015-03-18 | 1225-812-1213 | ND |
| 2015-03-18 | 1225-813-1225 | 2.30 ppb |
| 2015-03-24 | 1225-070-1015 | 4.50 ppb |
| 2015-04-08 | 1225-070-1150 | 1.40 ppb |
| 2015-04-21 | 1225-070-1005 | ND |
| 2015-05-07 | 1225-070-1003 | ND |
| 2015-05-19 | 1225-070-1040 | ND |
| 2015-06-02 | 1225-070-1015 | ND |
| 2015-06-15 | 1225-803-1020 | 11.0 ppb |
| 2015-06-15 | 1225-807-0957 | 1.30 ppb |
| 2015-06-15 | 1225-809-1227 | 8.60 ppb |
| 2015-06-15 | 1225-810-1031 | 9.10 ppb |
| 2015-06-15 | 1225-811-1116 | 11.4 ppb |
| 2015-06-16 | 1225-812-1300 | 6.40 ppb |
| 2015-06-16 | 1225-813-1339 | 6.80 ppb |
| 2015-06-17 | 1225-070-0950 | ND |
| 2015-06-19 | 1225-814-1210 | 11.5 ppb |
| 2015-06-30 | 1225-070-1045 | ND |
| 2015-07-15 | 1225-070-1045 | ND |
| 2015-07-22 | 1225-070-0930 | ND |
| 2015-07-29 | 1225-070-1215 | ND |
| 2015-08-18 | 1225-070-1005 | ND |
| 2015-09-02 | 1225-070-1020 | ND |
| 2015-09-15 | 1225-812-1303 | 4.50 ppb |
| 2015-09-15 | 1225-813-1340 | 7.20 ppb |
| 2015-09-15 | 1225-814-1530 | 16.5 ppb |
| 2015-09-17 | 1225-070-1020 | ND |
| 2015-09-17 | 1225-803-1035 | 4.70 ppb |
| 2015-09-17 | 1225-807-1015 | 4.40 ppb |
| 2015-09-17 | 1225-809-1203 | 5.70 ppb |
| 2015-09-17 | 1225-810-1048 | 5.80 ppb |
| 2015-09-17 | 1225-811-1105 | 8.80 ppb |
| 2015-09-29 | 1225-070-1000 | ND |
| 2015-10-14 | 1225-070-1010 | ND |
| 2015-10-27 | 1225-070-1000 | ND |
| 2015-11-10 | 1225-070-1000 | ND |
| 2015-11-24 | 1225-070-1045 | ND |
| 2015-12-08 | 1225-070-1000 | ND |
| 2015-12-14 | 1225-803-1042 | 4.50 ppb |
| 2015-12-14 | 1225-807-1025 | 5.30 ppb |
| 2015-12-14 | 1225-809-1410 | 4.80 ppb |
| 2015-12-14 | 1225-810-1051 | 5.60 ppb |
| 2015-12-14 | 1225-811-1147 | 7.90 ppb |
| 2015-12-15 | 1225-812-1245 | 5.10 ppb |
| 2015-12-15 | 1225-813-1333 | 6.40 ppb |
| 2015-12-17 | 1225-814-0945 | 19.0 ppb |
| 2015-12-21 | 1225-070-1130 | ND |
| 2016-01-05 | 1225-070-1100 | ND |
| 2016-01-07 | 1225-085-1505 | 6.90 ppb |
| 2016-02-04 | 1225-085-1015 | 4.80 ppb |
| 2016-03-07 | 1225-085-1030 | 3.70 ppb |
| 2016-03-14 | 1225-803-1119 | 7.40 ppb |
| 2016-03-14 | 1225-807-1058 | 8.60 ppb |
| 2016-03-14 | 1225-810-1126 | 9.00 ppb |
| 2016-03-14 | 1225-811-1220 | 13.9 ppb |
| 2016-03-16 | 1225-809-1440 | 10.3 ppb |
| 2016-03-16 | 1225-812-1220 | 1.20 ppb |
| 2016-03-16 | 1225-813-1320 | 4.00 ppb |
| 2016-03-17 | 1225-814-1030 | 19.7 ppb |
| 2016-04-05 | 1225-085-0958 | 4.60 ppb |
| 2016-06-13 | 1225-803-1110 | 9.80 ppb |
| 2016-06-13 | 1225-807-1045 | 4.50 ppb |
| 2016-06-13 | 1225-809-1316 | 9.50 ppb |
| 2016-06-13 | 1225-810-1119 | 8.60 ppb |
| 2016-06-13 | 1225-811-1200 | 10.6 ppb |
| 2016-06-14 | 1225-812-1303 | 7.20 ppb |
| 2016-06-14 | 1225-813-1350 | 7.20 ppb |
| 2016-06-17 | 1225-815-1433 | 21.7 ppb |
| 2016-08-22 | 1225-070-1010 | ND |
| 2016-09-06 | 1225-070-1330 | ND |
| 2016-09-14 | 1225-803-1032 | 10.5 ppb |
| 2016-09-14 | 1225-807-1013 | 1.20 ppb |
| 2016-09-14 | 1225-809-1410 | 20.6 ppb |
| 2016-09-14 | 1225-810-1043 | 8.20 ppb |
| 2016-09-14 | 1225-811-1102 | 11.9 ppb |
| 2016-09-14 | 1225-812-1145 | 6.70 ppb |
| 2016-09-14 | 1225-813-1315 | 10.1 ppb |
| 2016-09-16 | 1225-815-1545 | 9.40 ppb |
| 2016-09-22 | 1225-809-1302 | 15.7 ppb |
| 2016-10-04 | 1225-070-1315 | ND |
| 2016-11-16 | 1225-070-1015 | ND |
| 2016-12-02 | 1225-070-1730 | ND |
| 2016-12-13 | 1225-812-1310 | 6.80 ppb |
| 2016-12-13 | 1225-813-1413 | 11.6 ppb |
| 2016-12-14 | 1225-803-1110 | 7.40 ppb |
| 2016-12-14 | 1225-807-1050 | 6.60 ppb |
| 2016-12-14 | 1225-809-1300 | 9.30 ppb |
| 2016-12-14 | 1225-810-1118 | 7.60 ppb |
| 2016-12-14 | 1225-811-1200 | 9.30 ppb |
| 2016-12-16 | 1225-815-1320 | 8.70 ppb |
| 2016-12-20 | 1225-085-1135 | 4.40 ppb |
| 2017-01-06 | 1225-085-1500 | 4.60 ppb |
| 2017-02-28 | 1225-085-1250 | 5.30 ppb |
| 2017-03-14 | 1225-085-1300 | 5.30 ppb |
| 2017-03-14 | 1225-803-1107 | 6.50 ppb |
| 2017-03-14 | 1225-807-1048 | 9.30 ppb |
| 2017-03-14 | 1225-809-1320 | 7.70 ppb |
| 2017-03-14 | 1225-810-1113 | 8.30 ppb |
| 2017-03-14 | 1225-811-1202 | 12.0 ppb |
| 2017-03-15 | 1225-812-1310 | 1.000 ppb |
| 2017-03-15 | 1225-813-1420 | 6.20 ppb |
| 2017-03-15 | 1225-815-1350 | 19.0 ppb |
| 2017-03-28 | 1225-085-1321 | 5.80 ppb |
| 2017-04-11 | 1225-085-1245 | 6.10 ppb |
| 2017-06-09 | 1225-070-1105 | 5.10 ppb |
| 2017-06-12 | 1225-803-1056 | 13.5 ppb |
| 2017-06-12 | 1225-807-1038 | 3.60 ppb |
| 2017-06-12 | 1225-809-1326 | 13.8 ppb |
| 2017-06-12 | 1225-810-1104 | 10.3 ppb |
| 2017-06-12 | 1225-811-1154 | 15.8 ppb |
| 2017-06-13 | 1225-812-1235 | 9.50 ppb |
| 2017-06-13 | 1225-813-1414 | 13.2 ppb |
| 2017-06-13 | 1225-815-1331 | 5.50 ppb |
| 2017-06-20 | 1225-070-1055 | 3.20 ppb |
| 2017-06-28 | 1225-070-1159 | 2.30 ppb |
| 2017-07-11 | 1225-070-1025 | 2.60 ppb |
| 2017-07-18 | 1225-070-1020 | 2.30 ppb |
| 2017-07-25 | 1225-070-1200 | 2.00 ppb |
| 2017-08-01 | 1225-070-1230 | 2.20 ppb |
| 2017-08-24 | 1225-070-1020 | 1.10 ppb |
| 2017-09-11 | 1225-803-1112 | 6.90 ppb |
| 2017-09-11 | 1225-807-1058 | 7.30 ppb |
| 2017-09-11 | 1225-809-1352 | 12.7 ppb |
| 2017-09-11 | 1225-810-1122 | 8.90 ppb |
| 2017-09-11 | 1225-811-1215 | 12.1 ppb |
| 2017-09-12 | 1225-812-1240 | 8.50 ppb |
| 2017-09-12 | 1225-813-1348 | 11.3 ppb |
| 2017-09-12 | 1225-815-1310 | 20.8 ppb |
| 2017-12-11 | 1225-803-1114 | 13.8 ppb |
| 2017-12-11 | 1225-807-1100 | 3.50 ppb |
| 2017-12-11 | 1225-809-1321 | 11.1 ppb |
| 2017-12-11 | 1225-810-1125 | 13.9 ppb |
| 2017-12-11 | 1225-811-1213 | 11.8 ppb |
| 2017-12-12 | 1225-812-1255 | 6.40 ppb |
| 2017-12-12 | 1225-813-1356 | 8.30 ppb |
| 2017-12-12 | 1225-815-1320 | 20.1 ppb |
| 2018-03-12 | 1225-803-1105 | 13.6 ppb |
| 2018-03-12 | 1225-807-1048 | 10.3 ppb |
| 2018-03-12 | 1225-809-1322 | 6.70 ppb |
| 2018-03-12 | 1225-810-1112 | 7.90 ppb |
| 2018-03-12 | 1225-811-1203 | 13.4 ppb |
| 2018-03-13 | 1225-812-1223 | ND |
| 2018-03-13 | 1225-813-1350 | 14.5 ppb |
| 2018-03-13 | 1225-815-1332 | 14.3 ppb |
| 2018-05-01 | 1225-070-0930 | ND |
| 2018-05-10 | 1225-070-1130 | ND |
| 2018-05-18 | 1225-070-1045 | ND |
| 2018-05-30 | 1225-070-1005 | ND |
| 2018-06-11 | 1225-803-1123 | 6.90 ppb |
| 2018-06-11 | 1225-807-1102 | 6.70 ppb |
| 2018-06-11 | 1225-809-1341 | 10.5 ppb |
| 2018-06-11 | 1225-810-1129 | 6.80 ppb |
| 2018-06-11 | 1225-811-1226 | 11.2 ppb |
| 2018-06-12 | 1225-812-1235 | 5.20 ppb |
| 2018-06-12 | 1225-813-1328 | 8.30 ppb |
| 2018-06-12 | 1225-815-1354 | 14.1 ppb |
| 2018-06-13 | 1225-070-0930 | ND |
| 2018-06-26 | 1225-070-1015 | ND |
| 2018-06-30 | 1225-070-1055 | ND |
| 2018-07-09 | 1225-070-1005 | ND |
| 2018-08-14 | 1225-070-1440 | ND |
| 2018-09-10 | 1225-803-1106 | 9.90 ppb |
| 2018-09-10 | 1225-807-1050 | 1.50 ppb |
| 2018-09-10 | 1225-809-1328 | 1.70 ppb |
| 2018-09-10 | 1225-810-1113 | 6.50 ppb |
| 2018-09-10 | 1225-811-1208 | 11.0 ppb |
| 2018-09-11 | 1225-812-1316 | 8.30 ppb |
| 2018-09-11 | 1225-813-1436 | 9.80 ppb |
| 2018-09-11 | 1225-815-1416 | 3.10 ppb |
| 2018-09-19 | 1225-070-1100 | ND |
| 2018-10-09 | 1225-070-1200 | ND |
| 2018-11-05 | 1225-070-1325 | ND |
| 2018-12-03 | 1225-070-1145 | ND |
| 2018-12-10 | 1225-803-1138 | 6.00 ppb |
| 2018-12-10 | 1225-807-1120 | 7.20 ppb |
| 2018-12-10 | 1225-809-1421 | 9.50 ppb |
| 2018-12-10 | 1225-810-1147 | 5.30 ppb |
| 2018-12-10 | 1225-811-1208 | 9.10 ppb |
| 2018-12-10 | 1225-812-1243 | 6.10 ppb |
| 2018-12-10 | 1225-813-1343 | ND |
| 2018-12-10 | 1225-815-1312 | 9.50 ppb |
| 2019-01-15 | 1225-085-1545 | 4.20 ppb |
| 2019-02-12 | 1225-085-1245 | 5.30 ppb |
| 2019-03-11 | 1225-803-1342 | 4.30 ppb |
| 2019-03-11 | 1225-807-1322 | 5.20 ppb |
| 2019-03-11 | 1225-809-1440 | 5.30 ppb |
| 2019-03-11 | 1225-810-1350 | 4.40 ppb |
| 2019-03-11 | 1225-811-1408 | 7.30 ppb |
| 2019-03-11 | 1225-812-1515 | ND |
| 2019-03-11 | 1225-813-1645 | 1.70 ppb |
| 2019-03-11 | 1225-815-1622 | 1.20 ppb |
| 2019-03-19 | 1225-085-1640 | 6.40 ppb |
| 2019-04-10 | 1225-085-1340 | 5.00 ppb |
| 2019-06-07 | 1225-070-1350 | 2.90 ppb |
| 2019-06-11 | 1225-803-1340 | 5.00 ppb |
| 2019-06-11 | 1225-807-1317 | 5.00 ppb |
| 2019-06-11 | 1225-809-1705 | 8.80 ppb |
| 2019-06-11 | 1225-810-1350 | 5.20 ppb |
| 2019-06-11 | 1225-811-1420 | 7.50 ppb |
| 2019-06-11 | 1225-812-1520 | ND |
| 2019-06-11 | 1225-813-1634 | 3.80 ppb |
| 2019-06-11 | 1225-815-1615 | 8.80 ppb |
| 2019-06-21 | 1225-070-1452 | 2.10 ppb |
| 2019-07-02 | 1225-070-1250 | ND |
| 2019-07-16 | 1225-070-1425 | ND |
| 2019-08-01 | 1225-070-1305 | 2.20 ppb |
| 2019-08-08 | 1225-070-1545 | 1.20 ppb |
| 2019-09-06 | 1225-070-1325 | ND |
| 2019-09-10 | 1225-803-1349 | 5.80 ppb |
| 2019-09-10 | 1225-807-1335 | 3.30 ppb |
| 2019-09-10 | 1225-809-1725 | 12.7 ppb |
| 2019-09-10 | 1225-810-1358 | 5.50 ppb |
| 2019-09-10 | 1225-811-1440 | 7.90 ppb |
| 2019-09-10 | 1225-812-1510 | 5.40 ppb |
| 2019-09-10 | 1225-813-1558 | 8.30 ppb |
| 2019-09-10 | 1225-815-1537 | 2.50 ppb |
| 2019-10-22 | 1225-070-1330 | ND |
| 2019-11-05 | 1225-070-1340 | ND |
| 2019-12-02 | 1225-070-1245 | ND |
| 2019-12-09 | 1225-803-1536 | 5.00 ppb |
| 2019-12-09 | 1225-807-1510 | 3.80 ppb |
| 2019-12-09 | 1225-809-1652 | 4.60 ppb |
| 2019-12-09 | 1225-810-1545 | 5.00 ppb |
| 2019-12-09 | 1225-811-1627 | 6.10 ppb |
| 2019-12-10 | 1225-812-1648 | ND |
| 2019-12-10 | 1225-813-1742 | 9.30 ppb |
| 2019-12-10 | 1225-815-1722 | 11.2 ppb |