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

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

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

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

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 www.asdwa.org

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.

ASDWA-USGS Webinar Please type in your questions!

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. www.asdwa.org/source-water/road-salt/

ASDWA-USGS Webinar Please type in your questions!

VIEW THE WEBINAR RECORDING on the ASDWA website at www. asdwa VIEW THE WEBINAR RECORDING on the ASDWA website at www.asdwa.org/past-events-webinar-recordings After the Webinar