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Project Details
Transportation & Government Services
Construction of 48” Raw Water Interconnect between the Miami Well Field and the Ottawa Treatment Plant
This project is part of Dayton Water’s PFAS Strategy. The objective is to ensure compliance with PFAS Maximum Contaminant Levels by increasing production at the Miami Well Field to convey raw water to the Ottawa Treatment Plant. The ability to blend water that is not contaminated with PFAS with water from the Mad River Well Field for treatment at the Ottawa Water Treatment Plant will enable Dayton to decrease the level of PFAS contamination in its finished water.
Organization Details
City of Dayton
101 West Third Street
Dayton, Ohio. 45402
Montgomery
Same
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Government
Organization Contact Details
Rosalind Bertolo
Special Projects Administrator
City of Dayton
937-333-3755
320 West Monument Avenue
Dayton, Ohio. 45402
Montgomery
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Location Details
Dayton
Montgomery
Ohio 10th
Financial Details
30000000
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No source of a match is known at this time. The City of Dayton should not be responsible for the remediation of the PFAS contamination. Dayton did not cause the WPAFB contamination, which occurred outside of Dayton on property owned and controlled by the U.S. Government. The City has brought suit against the PFAS manufacturers as well as the Department of Defense in order to remediate these sites. It is inherently unfair to require the impoverished ratepayers of the City of Dayton to cover the cleanup of pollution that the City did not cause and that occurred outside of Dayton’s boundaries in areas where it had no control.
Construction or Capital
No
The City is working closely with OEPA regarding emerging contaminant funding. Funds allocated to OEPA through BIL may be available.
No
Within the next 6 months
OEPA Division of Environmental and Financial Assistance, State Revolving Loan Fund
Community Details
BACKGROUND
In 2016, the Environmental Protection Agency (EPA) introduced lower Health Advisory Levels (HAL) for perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS) at 70 ppts. The City had previously monitored for PFOA and PFOS during the Third Unregulated Contaminant Monitoring Rule (UCMR3) 2013-1015, with the results showing as non-detect at Ottawa and Miami Water Treatment Plant, as the detection limits were 20 and 40ppt respectively.

Upstream of the City’s water source Wright Patterson Airforce Base (WPAFB) detected PFAS during UCMR3 above the HAL. Under the advisement of the regulatory agency and out of an abundance of caution, the City took aggressive actions to preserve the source water and ensure its customers receive safe, high-quality drinking water. Measures included:

• Expanding the early warning monitoring well network.
• Monitoring at the treatment plants.
• Removing production wells from operational rotation.

The removal of production wells from operational rotation was viewed as a temporary solution while the City investigated more sustainable solutions, using the data gained from the increased monitoring schedules. Also, removing production wells decreased the water systems redundancy and increased operational costs as production wells are not rotated on their normal schedules.
In 2018, an updated analytical method was approved, lowering the quantifiable concentration numbers of PFOA and PFOS. Thus, the City started seeing detections in its Mad River Well Field and its Ottawa Water Treatment. The Mad River Well Field supplies water to the Ottawa Water Treatment Plant and the Miami Well Field supplies water to the Miami Water Treatment Plant. Currently, the water supplies are separate.

In June 2022, the EPA again lowered HAL for perfluorooctanoic acid (PFOA), perfluorooctanesulfonic acid (PFOS), and introduced new HALS perfluorobutanesulfonic acid (PFBS), and GenX. The current City detections:
• PFOA 4 ppq (0.004ppt)
o Ottawa Water Treatment Plant 1.20 ppt (5/10/22)- 5.14 ppt (12/14/19)
o Miami Water Treatment Plant ND
• PFOS 20ppq (0.020ppt)
o Ottawa Water Treatment Plant 1.20 ppt (6/26/19)- 13.7 ppt (9/06/18)
o Miami Water Treatment Plant ND
• GenX 10ppt
o ND at Ottawa and Miami Water Treatment Points
• PFBS 2000 ppt
o ND at Ottawa and Miami Water Treatment Points

As previously stated, the City took temporary aggressive actions of removing production wells from operational rotation while waiting on the final guidance agency and developing a more permanent solution to manage PFAS contamination found in its water, based on data gathered from 2015 through the present.
No
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Additional Details
No
Rosalind Bertolo
937-333-3755
rosalind.bertolo@daytonohio.gov
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