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Health Advisory

Last updated: October 16, 2017, 1:40 pm

How to help North Bay Wildfire Victims:

Wildfire relief organizations prefer monetary donations at this time. For safety reasons, and to avoid blocking emergency traffic, please don’t bring donations to areas affected by wildfires.

Places to donate in Contra Costa:

The Bay Area Air Quality Management District has declared a health advisory due to heavy smoke from the North Bay Fires. For more information visit

RMP - EBMUD Walnut Creek Treatment Plant

The Walnut Creek Treatment 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