Sentinel file photo Pictured is the outside of the Mifflin County Municipal Authority.

MILROY– Residents served by the Mifflin County Municipal Authority can once again safely use their tap water after officials lifted a “Do Not Drink” notice Sunday evening.

The advisory, which had been in place since April 18, was officially lifted at 7:30 p.m. April 19 following testing that found no contamination in the water supply.

The notice was issued after an overturned commercial truck spilled fuel, oil, and other fluids into the Laurel Creek Dam and Reservoir along U.S. Route 322, raising concerns about potential water contamination.

Complicating the situation, officials said an electrical transformer surge caused a catastrophic failure at one of the system’s primary alternate water sources, limiting the authority’s ability to meet demand without drawing from the affected reservoir.

Despite those challenges, the authority resumed withdrawing and treating water from the reservoir while conducting required safety testing under guidance from the Pennsylvania Department of Environmental Protection.

According to officials, two rounds of water samples were collected — the first within 20 minutes of treatment beginning and a second set 24 hours later. All results showed “non-detect” levels for volatile organic compounds, indicating no contamination was found.

With those results, the authority determined the water is safe for drinking, cooking, and other household uses.

Officials said monitoring will continue, with additional testing to be conducted if necessary. Customers will be notified if conditions change.

For updates and more information, residents can visit the authority’s website or contact officials directly.