EPA’s Role in Source Water Protection. Roy Simon, Associate Branch Chief, Prevention, Drinking Water Protection Division, Office of Ground Water & Drinking Water April 29, 2008. Overview. Background on drinking water sources & contaminants Overview of EPA programs to protect drinking water
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Roy Simon, Associate Branch Chief, Prevention, Drinking Water Protection Division, Office of Ground Water & Drinking Water
April 29, 2008
Prevention through Source Water Protection
User -- Information
Source Water Protection has been a vital part of the multiple barrier approach to providing safe drinking water since the 1996 SDWA Amendments
Distribution of Community Water Systems by Source Water
Population Served by Drinking Water Source
…but most small systems use ground water
Source: SDWIS Fed 2006
Population served by system size
Size Distribution of Community Water Systems
…yet most community water systems are small (84 %)
> 3,300 people served
Source: SDWIS Fed: 2006
Sources of Contamination Water Systems
Viruses (e.g., Norwalk virus) Water Systems
Bacteria (e.g., Shigella, E.Coli)
Parasites, protozoa or cysts
NitrateWhat Contaminants Cause Acute Health Effects?
Warning Sign About
Dangers of Nitrate
Example: Septic Systems Effects?
and Nitrogen and Viral Loading
= 35- 40
On-Site Septic Hydraulic Failure Effects?
Public distribution of findings Effects?
Contamination source inventory
DelineationWhat is a Source Water Assessment?
Focus on reducing the most serious threats to source waters:
Source Water Protection should reduce infrastructure costs of drinking water treatment, at least over time.
showing 8 to 1 benefits of prevention
increases in forested land reduces costs of treatment
website) shows environmental impacts of prevention