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Health Advisory Lifted for Pittsburg and Antioch

Last updated: 5:39 a.m. Friday, March 27, 2015

The health advisory for Pittsburg and Antioch has been lifted. The advisory was issued for people with respiratory sensitivities this morning after a chemical release at Dow Chemical in Pittsburg. Contra Costa HazMat staff are investigating the incident. More information will be posted as it becomes available.

RMP - EBMUD Sobrante Filter Plant


The Sobrante Filter Plant water treatment plant is one of EBMUD's six water treatment plants that combined can filter and process more than 375 million gallons of water daily. Each of these plants uses aqueous ammonia in their disinfection step of water treatment. The ammonia is added in small amounts to the water in order to create chloramines which are a disinfectant that last longer in the water distribution system.


Regulated Substances Subject to CalARP/Federal RMP/ISO:
Regulated Substance Program Level CalARP Regulated Federal RMP Regulated ISO Regulated
Aqueous Ammonia (PDF) 1 yes no no