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Nixa staff propose phased wastewater rate increases through 2030 to fund plant repairs
Summary
City staff presented a five-year wastewater rate proposal that would raise monthly base and consumption charges in larger steps in 2025–26, then smaller annual increases through 2030, citing capital needs at the city's 20-year-old treatment plant and a desire to maintain existing reserves.
City of Nixa officials on Jan. 28 outlined a proposed five-year wastewater rate structure intended to fund near-term capital repairs and maintain the utility's reserve levels.
Assistant Public Works Director Travis Gossey, presenting the first reading of council bill 2025-04, said the city contracted Algar Martin Engineers to update the wastewater master plan and Schaeffer and Hines and Associates to model rates. Gossey said the main treatment plant is designed for 4 million gallons per day and is currently treating about 1.7 million gallons per day, leaving available capacity but requiring near-term capital work because the facility reached 20 years of service in 2023.
Gossey said, "we have a very healthy system," and that consultants identified routine wear items and equipment reaching the end of expected life as the chief near-term needs. He listed recent work including a clarifier lining that cost about $600,000, and said other clarifiers and rotors are scheduled for repair or replacement.
Why it matters: The proposed increases front-load spending to cover those immediate capital items, then ease to smaller increases so the utility can carry into the next planning period without large reserve draws. Gossey said the proposal would preserve the wastewater fund's present purchasing-power balance into 2030.
Key details: - Proposed increases for 2025: base rate +$1.00 and consumption rate +$0.95. - Proposed increases for 2026: base rate +$1.00 and consumption rate +$1.00. - Proposed increases for 2027'30: annual increases of $0.50 to the base rate and $0.50 to the consumption rate. - Using a 5,000-gallon monthly consumption example (roughly a family of four), staff modeled an average monthly bill rising from $41.15 in 2025 to about $59.15 by 2030. - Staff and consultants modeled a 2.5% annual growth rate and a 6% year-over-year operations and maintenance increase for planning purposes.
Gossey told council the rate plan was structured so the wastewater fund would remain similar in nominal dollars to its current balance across the five-year window; staff described the fund as holding roughly $23 million now and projected to maintain about that level under the proposal.
Public questions and regulatory risk: Resident Ron Sanders asked whether anticipated regulatory costs were considered. Gossey replied that known forthcoming regulations, including proposed EPA rules addressing PFOS, "were actually anticipated and incorporated in the master plan," and that the study assumed those items where possible.
What council will do next: This was the bill's first reading; no vote was taken. Staff said the matter can return for a second reading and formal vote after council's review and any requested changes.
Ending: Gossey closed by offering to answer additional questions and said the consultants believe the proposals will keep the system well-funded while addressing near-term equipment replacements.
