Source water assessments are provided to public water systems by IDEM and are intended to provide basic information to public water suppliers regarding:
- where their drinking water comes from
- the degree, called susceptibility, to which the drinking water source may be impacted by potential sources of contamination.
A system's susceptibility was rated on a scale from low to high. To view the complete Source Water Assessment, please search the Drinking Water Branch Virtual File Cabinet.
To find out susceptibility determination of a public water system, you may download or view one of the files below. The spreadsheets are arranged by county. A brief explanation of each column in the spreadsheet:
- PWSID: Public Water Supply Identification Number
- System Name: System Name on file with IDEM
- County Name: County in which the system is located
- System Status: Current status of system, either Active or Inactive
- Susceptibility Determination: Final susceptibility determination made by IDEM
- Community Public Water Supply Systems Susceptibility Determinations [PDF]
- Includes all completed assessments for a public water system that provides water for human consumption to at least 15 service connections used by year-round residents, or one that regularly serves at least 25 year-round residents (e.g., municipalities, subdivisions, and mobile home parks).
- Non-Transient Non-Community Supply Systems Susceptibility Determinations [PDF]
- Includes all completed assessments for a public water system that regularly serve at least 25 of the same individuals over six (6) months (e.g., schools, churches, businesses).
- Transient Non-Community Supply Systems Susceptibility Determinations [PDF]
- Includes all completed assessments for a public water system that does not regularly serve at least 25 of the same individuals over six (6) months (e.g., highway rest stops, restaurants, parks).
Source Water Protection Workshop (2012)
- Pesticides and Nutrients in Source Water Workshop Summary [PDF]
- Atrazine Test Kit for Quick Results [PDF]
- Patoka River Rapid Watershed Assessment [PDF]
- USGS Report on Nitrates [PDF]
- Phosphorus Best Management Practices (BMPs) [PDF]
- CCR99 - Resource Conserving Crop Rotations [PDF]
Resources for Pesticides and Nutrients in Source Water:
- National Source Water Collaborative
- U.S. EPA: Drinking Water Contaminants
- U.S. EPA: Gulf of Mexico Nutrient Task Force
- U.S. EPA: Information about Nutrient Pollution
- USDA: NRCS Interactive Data Viewer
- USGS: Health Concerns of Contaminant Exposure by Drinking Water
- USGS: Pesticides and Source Water Studies
Regional / State:
- Rapid Watershed Assessment for the Patoka River Watershed [PDF]
- 2011 CEES, IUPUI Presentation on Taste and Odor compounds in Patoka Lake
- Source Water Protection Plan for Patoka Lake Watershed (2007) [PDF]
- Source Water Protection Workshop at Huntingburg (February 9, 2012) [PDF]
Top 10 Ways You Can Protect Ground Water
- Dispose of chemicals properly. Do not pour chemicals down drains!
- Take used motor oil to a recycling center.
- Limit the amount of fertilizer and pesticides used on gardens and lawns.
- Properly abandon unused wells or cisterns.
- Dispose of household hazardous waste properly.
- Remove abandoned fuel oil and gasoline tanks properly.
- Keep septic systems well maintained.
- Report illegal dumping.
- Minimize the use of de-icers.
- Get involved in water educational programs.