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La Cygne switches to chlorine-dioxide treatment; council approves monitoring equipment
Summary
After months of review, council authorized a lease-to-purchase of a chlorine-dioxide generator and approved HACH monitoring equipment; KDHE permit signing was authorized and staff reported initial tests showing much lower THM/HAA readings.
The La Cygne City Council approved a move to chlorine-dioxide disinfection for the municipal water plant after staff and the city engineer reviewed two vendor proposals. At a May meeting the council authorized a six-month lease of a CDG Technology GS‑20 chlorine-dioxide system, with half of the lease payments applied to purchase; the motion passed 4-0. The mayor had been authorized in April to sign the KDHE permit application to change the treatment process.
Public Works Superintendent George Craig also secured a HACH autocat 9000 monitoring system to keep regulatory readings under daily review; the council approved the purchase not to exceed $3,483.70. KDHE sample results after startup showed much lower disinfection byproduct numbers: trihalomethanes (THMs) and haloacetic acids (HAAs) measured well under state limits, according to council minutes. Council and staff said the system should help the city meet state requirements and reduce future compliance risk.
