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State Water Resources Control Board <br /> Division of Water Quality <br /> GAMA Program <br /> GROUNDWATER INFORMATION SHEET <br /> Dibromochloropropane (DBCP) <br /> The purpose of this groundwater information sheet is to provide general information <br /> regarding a specific constituent of concern (COC). The information, provided herein <br /> relates to wells (groundwater sources) used for public drinking water, not water <br /> served at the tap. <br /> GENERAL INFORMATION <br /> Constituent of Dibromochloropropane (DBCP) <br /> Concern <br /> Synonyms 1,2-Dibromo-3-chloropropane, BBC 12, Fumagon, Fumazone, <br /> Nemabrom, Nemafume, Nemagon, Nemanax, Nemapaz, <br /> Nemaset, Nematocide, Nematox, Nemazon, OS 1987, Oxy- <br /> DBCP, Gro-Tone Nematode, Durham Nematicide, OS 1897 <br /> Chemical Formula C3H5Br2Cl <br /> CAS No. 96-12-8 <br /> Storet No. 38761 <br /> Summary 1,2-dibromo-3-chloropropane (DBCP) is a regulated chemical <br /> with an established Maximum Contaminant Level (MCL) of 0.2 <br /> micrograms per liter(pg/L). DBCP was used as a soil fumigant <br /> in the control of nematodes. DBCP's use in California was <br /> stopped in 1977, and EPA had banned the agricultural <br /> application of DBCP in the continental United States in 1979. <br /> Very small quantities are still used as an intermediate in <br /> chemical synthesis. Public well data from January 2006 to July <br /> 2016 indicates that there are 156 active and standby public <br /> water wells (12,337 wells tested), with at least one detection <br /> above the MCL. Most detections of DBCP above the MCL have <br /> occurred in Fresno, San Joaquin and San Bernardino counties. <br /> Revised: July, 2016 <br />