The Source Water Protection Program prevents increased risk to the public water supply by regulating the quantity and use of chemicals by businesses located in the Multi-Jurisdictional Source Water Protection Area. This is accomplished through chemical inventory reviews, periodic facility inspections, and financial incentives to businesses.

Public Health staff also provides technical assistance to officials of Harrison Township, the cities of Riverside, Vandalia and Huber Heights. The city of Dayton operates a parallel program within the Dayton corporation limits.

Note: If located within Harrison Township, Riverside, Vandalia, or Huber Heights, call Public Health staff. If located within Dayton city limits, call Dayton Division of Environmental Management.


Great Miami Valley Buried Aquifer map

The Program helps protect the Great Miami Buried Valley Aquifer, one of the most productive sources of groundwater in North America.

The Great Miami Buried Valley Aquifer:

  • Gallons of water stored: 3 trillion
  • Drinking water consumers supplied: nearly 400,000
  • Chemical inventory reductions since beginning of Program: 17,000,000 lbs.


How is this program beneficial?

The Sherwin-Williams paint warehouse fire in 1987 demonstrated that it is very risky to store chemicals over the area’s primary drinking water supply. Since 1988 the program has overseen a 17 million pound permanent reduction of chemicals stored in the Source Water Protection Area.

What and where is the Source Water Protection Area?

It is a water-bearing zone around the City of Dayton well fields where spilled chemical contaminants would reach public water supply wells within one year. It includes parts of Dayton, Riverside, Harrison Township, Huber Heights, Vandalia and Wright Patterson Air Force Base.

What materials are regulated by the Source Water Protection Program?

The regulations restrict substances which have a Material Data Safety Sheet indicating a health hazard. As a rough rule of thumb, nearly any substance which you should not eat or drink would be regulated.

Are chemicals at my home restricted by the Source Water Protection Program?

No. Private residences are exempt from the regulations. However, homeowners should also practice proper storage, handling and disposal of potentially harmful chemicals.

What is required if I plan to move my business into the Source Water Protection Area?

Consult with Source Water Protection staff and local zoning officials to ensure your expected chemical needs will not exceed the limits for the property.

What requirements are placed on my business after opening?

Business operators are obligated to keep chemical inventories within the limits established, to file a chemical inventory report every two years, allow access for periodic chemical inventory inspections, and report chemical spills to appropriate authorities.

Can I expand my business in the Source Water Protection Area?

Yes, but you may not increase your chemical inventory above the maximum established for the property.

Is there financial assistance available to help with the cost of reducing source water risk at my business?

Yes. If your business is located in the Source Water Protection Area, your project may be eligible for risk reduction funds.

How can I get more information about risk reduction assistance for my business in the Source Water Protection Area?

Contact Public Health staff if your business is in Harrison Township, Riverside, Vandalia, or Huber Heights. If it is located within the city of Dayton, contact the Dayton Division of Environmental Management.


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