1. Association of State Drinking Water Administrators
USGS Webinar: Changing Source Water Quality - Links to Potential Corrosivity and Emerging Assessment Tools
Deirdre Mason
Association of State Drinking Water Administrators
November 19, 2018

2. About ASDWA
Mission: To protect public health and the economy through the provision of safe drinking water
Members: Drinking Water Program Administrators: 50 states, territories, the Navajo Nation, and the District of Columbia
Public Water System Oversight
Regulation
Technical assistance
Funding – DWSRF, set-asides
Coordination with Multiple Partners

3. ASDWA-USGS Webinar Series
This is the fourth webinar in our series
April 24: Drinking Water Related Research, Data, and Tools
July 2: Cyanotoxins – Advancing Drinking Water Science to Protect Human Health
September 5: Chemical and Microbial Contaminants in Drinking Water
Stay tuned for announcement about the upcoming webinar on:
Modeling water quality over time, human exposure and health outcomes

4. Today’s Webinar Presenters: Purpose: To provide information on:
The potential corrosivity of the Nation’s surface waters and groundwater with implications for exceedances of lead action levels in drinking water
Tools for monitoring and for developing source water management strategies
Presenters:
Ted Stets, USGS
Steve Preston, USGS

5. After the Webinar
Please note that a video recording of today’s webinar will be made available for viewing on ASDWA’s web site within the next few days at

6. Please Type In Your Questions!
Please type your questions into the box on your webinar control panel.
We will not be taking verbal questions.
You may type in your questions at any time during the webinar.
We will answer questions after all of the presenters are finished speaking.

7. ASDWA-USGS Webinar
Please type in your questions!

8. Road Salt and Drinking Water
SOURCE WATER PROTECTION
TREATMENT
DISTRIBUTION
CONSUMER
SAFE DRINKING WATER ACT MULTIPLE BARRIER APPROACH
Multi-Barrier Approach
Road Salt Impacts on Drinking Water
Protection from contamination (from road salt, additives, and de-icing compounds)
Surface water: Alkaline rivers and mobilization of contaminants from soils and sediments.
Ground water: Mobilization of arsenic and other natural contaminants in aquifers.
2. Drinking water treatment
High treatment costs for reverse osmosis, distillation, or de-ionization and for disinfection by-products.
3. Distribution system delivery
Leaching of metals (e.g., lead and copper) from pipe corrosion in the distribution system.
4. Community Involvement
Working with (transportation) partners and the public to reduce and tailor the use of salt and de-icing applications.

9. ASDWA-USGS Webinar
Please type in your questions!

10. VIEW THE WEBINAR RECORDING on the ASDWA website at www. asdwa
VIEW THE WEBINAR RECORDING on the ASDWA website at
After the Webinar