Know Your Environment. Protect Your Health.

1,2-Dibromo-3-chloropropane (DBCP)

City Of Modesto - Del Rio

1,2-Dibromo-3-chloropropane is a pesticide fumigant banned in the 1970s after scientists discovered it caused sterility in men who worked with it. The chemical causes cancer in laboratory animals and may cause cancer in people. Read More.

This pesticide breaks down very slowly in the environment. It remains in groundwater and drinking water wells in the agricultural areas where it was sprayed in the past. Men exposed to this pesticide in the fields suffered from infertility and testicular damage, and tended to have fewer male babies.

 

90

Samples

29

Samples exceeding legal limit (MCL)

38

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.206 ppb330.0330 ppb - 0.550 ppb
20190.0320 ppb220.0290 ppb - 0.0350 ppb
20200.246 ppb84ND - 0.870 ppb
20210.248 ppb2411ND - 0.810 ppb
20220.140 ppb2714ND - 0.420 ppb
20230.0681 ppb264ND - 0.750 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.0017 ppb

The EWG Health Guideline of 0.0017 ppb for 1,2-dibromo-3-chloropropane was defined 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. This health guideline protects against cancer.

EPA Maximum Contaminant
Level (MCL): 0.2 ppb

The legal limit for 1,2-dibromo-3-chloropropane, established in 1991, was based on analytical detection limits at the time that the standard was set. This limit does not fully protect against the risk of cancer due to 1,2-dibromo-3-chloropropane exposure.

ppb = parts per billion

All test results

Date Lab ID Result
2018-04-04CA5010029_002_002-2018040408350.0330 ppb
2018-05-14CA5010029_010_010-2018051408300.550 ppb
2018-11-07CA5010029_004_004-2018110708450.0360 ppb
2019-04-03CA5010029_002_002-2019040307550.0290 ppb
2019-11-06CA5010029_004_004-2019110612400.0350 ppb
2020-04-01CA5010029_002_002-2020040109250.0440 ppb
2020-05-13CA5010029_010_010-2020051310470.870 ppb
2020-11-04CA5010029_011_011-202011040920ND
2020-11-04CA5010029_010_010-2020110409400.360 ppb
2020-11-04CA5010029_004_004-202011041115ND
2020-12-02CA5010029_011_011-202012021020ND
2020-12-02CA5010029_001_001-202012021125ND
2020-12-02CA5010029_010_010-2020120209550.690 ppb
2021-01-06CA5010029_010_010-2021010608050.420 ppb
2021-01-06CA5010029_011_011-202101060907ND
2021-02-03CA5010029_010_010-2021020308170.810 ppb
2021-02-03CA5010029_011_011-202102030902ND
2021-03-03CA5010029_010_010-2021030308400.760 ppb
2021-03-03CA5010029_011_011-202103030925ND
2021-04-07CA5010029_010_010-2021040708150.660 ppb
2021-04-07CA5010029_002_002-202104070950ND
2021-04-07CA5010029_011_011-202104070900ND
2021-05-04CA5010029_010_010-2021050409000.370 ppb
2021-05-04CA5010029_011_011-202105040835ND
2021-06-01CA5010029_010_010-2021060107550.670 ppb
2021-06-01CA5010029_011_011-202106010910ND
2021-07-06CA5010029_011_011-202107061245ND
2021-07-06CA5010029_010_010-2021070610400.460 ppb
2021-09-01CA5010029_011_011-202109010855ND
2021-09-01CA5010029_010_010-2021090108150.420 ppb
2021-10-06CA5010029_010_010-2021100608300.570 ppb
2021-10-06CA5010029_011_011-202110060900ND
2021-11-03CA5010029_010_010-2021110309300.470 ppb
2021-11-03CA5010029_011_011-202111030905ND
2021-11-03CA5010029_004_004-202111030845ND
2021-12-01CA5010029_010_010-2021120109200.350 ppb
2021-12-01CA5010029_011_011-202112010900ND
2022-01-05CA5010029_011_011-202201050828ND
2022-01-05CA5010029_010_010-2022010508020.390 ppb
2022-02-02CA5010029_010_010-2022020209150.320 ppb
2022-02-02CA5010029_011_011-202202020950ND
2022-03-02CA5010029_011_011-202203020840ND
2022-03-02CA5010029_010_010-2022030208550.400 ppb
2022-04-06CA5010029_010_010-2022040610000.0970 ppb
2022-04-06CA5010029_011_011-202204061030ND
2022-04-06CA5010029_002_002-202204061255ND
2022-05-04CA5010029_011_011-202205040850ND
2022-05-04CA5010029_010_010-2022050408000.420 ppb
2022-06-01CA5010029_011_011-202206010915ND
2022-06-01CA5010029_010_010-2022060108300.270 ppb
2022-06-29CA5010029_004_004-2022062908590.0820 ppb
2022-07-05CA5010029_011_011-202207051310ND
2022-07-05CA5010029_010_010-2022070512300.150 ppb
2022-08-03CA5010029_011_011-202208031105ND
2022-08-03CA5010029_010_010-2022080310250.280 ppb
2022-09-06CA5010029_010_010-2022090609500.350 ppb
2022-09-06CA5010029_011_011-202209061030ND
2022-10-05CA5010029_010_010-2022100509000.310 ppb
2022-10-05CA5010029_011_011-202210050930ND
2022-11-02CA5010029_004_004-2022110210000.1000 ppb
2022-11-02CA5010029_010_010-2022110212400.320 ppb
2022-11-02CA5010029_011_011-202211021310ND
2022-12-07CA5010029_011_011-202212070930ND
2022-12-07CA5010029_010_010-2022120708500.280 ppb
2023-01-03CA5010029_011_011-202301031310ND
2023-01-03CA5010029_010_010-202301031235ND
2023-02-01CA5010029_011_011-202302011030ND
2023-02-01CA5010029_010_010-202302010955ND
2023-03-01CA5010029_011_011-202303011240ND
2023-03-01CA5010029_010_010-202303011200ND
2023-04-05CA5010029_010_010-202304050935ND
2023-04-05CA5010029_002_002-202304050835ND
2023-04-05CA5010029_011_011-202304051010ND
2023-05-03CA5010029_010_010-202305030910ND
2023-06-07CA5010029_010_010-2023060709100.300 ppb
2023-06-07CA5010029_011_011-202306070950ND
2023-07-05CA5010029_010_010-2023070509250.350 ppb
2023-07-05CA5010029_011_011-202307051005ND
2023-08-02CA5010029_010_010-2023080209250.750 ppb
2023-08-02CA5010029_011_011-202308021040ND
2023-09-05CA5010029_011_011-202309051000ND
2023-09-05CA5010029_010_010-2023090509250.370 ppb
2023-10-04CA5010029_010_010-202310040910ND
2023-10-04CA5010029_011_011-202310040945ND
2023-11-01CA5010029_010_010-202311010930ND
2023-11-01CA5010029_004_004-202311010910ND
2023-11-01CA5010029_011_011-202311011010ND
2023-12-06CA5010029_010_010-202312060900ND
2023-12-06CA5010029_001_001-202312060825ND
2023-12-06CA5010029_011_011-202312060945ND