The mayor said the city could have the state’s first-such treatment system for the ubiquitous fluorinated compounds known as “forever chemicals,” but must act quickly to get in line for federal clean water grants that will become available next year.

“Ensuring safe drinking water for all members of our community is one of the city’s most important responsibilities, and we have committed to keeping Well 15 offline until we have a PFAS treatment or filtration system,” Rhodes-Conway said in a written statement announcing the plan. “We are prepared to do everything we can to seize this funding opportunity to build Wisconsin’s first municipal PFAS treatment facility.”

The Madison Water Utility shut down Well 15 on East Washington Avenue in 2019 after tests showed elevated levels of toxic PFAS compounds, likely the result of contamination at the nearby Dane County Airport.

The mayor and Ald. Nasra Wehelie said Monday they have drafted a resolution authorizing the utility to contract with AECOM for up to $375,000 in design and engineering services for a filtration system. The resolution includes another $50,000 for staff time.

According to a water utility memo, the no-bid contract is needed in order to have a “shovel ready” project to submit in October when the Department of Natural Resources accepts grant proposals for 2023.

The funds are part of more than $143 million in water funding provided to the state as part of the Bipartisan Infrastructure Law passed by Congress last year. The bill provides $12.8 million in each of the next five years for projects targeting “emerging contaminants” in drinking water.

With many Wisconsin communities facing PFAS contamination, the competition for the grants is likely to be stiff, according to the memo. Utility leaders say the Well 15 project is likely to receive funding, but if it is rejected the contract would allow for work to be suspended, capping costs at about $160,000.

According to the memo, AECOM was among eight nationwide consultants interviewed for the job but stood out “based on its proven experience and expertise in designing PFAS treatment facilities.”

The project will be led by a Stevens Point engineer whose team worked on the utility’s first iron and manganese treatment system in 2009, the memo states.

Water quality manager Joe Grande last year said a recommended carbon filtration system — which could remove both PFAS and volatile organic compounds in Well 15 — would cost about $670,000 to install and $136,000 to $300,000 per year to operate depending on the level of PFAS contamination allowed.

The utility has also sought federal funding to cover the $20,000 cost of testing every well twice a year for PFAS.

Tests conducted in 2020 showed PFAS present in all 22 of Madison’s active wells, though none above the state’s proposed safe drinking water limits. Testing done last fall found detectable levels in only 14 wells; one was above the Department of Health Services’ proposed action threshold and another two were within 90% of that mark.

Used for years in firefighting foam, stain-resistant fabrics, non-stick cookware and other products, the synthetic compounds do not break down naturally and have been linked to health problems including cancer, liver disease and high cholesterol.

Earlier this year, conservatives on the state’s natural resources board blocked proposed regulations to limit the amount of two PFAS compounds in drinking water, rejecting recommendations from state health officials.