City of Cascade Iowa Public Works Sewer Department
The City of Cascade provides wastewater collection and treatment for Cascade residents and businesses with an underground sanitary sewer collection system and a mechanical wastewater treatment plant. The collection system consists of 120 manholes, 9 miles of gravity flow sewer line, and 3 lift stations. The wastewater treatment plant is licensed and monitored by the Iowa Department of Natural Resources via a NPDES permit. The treatment plant consists of a head-end lift station, aerated grit collector, two primary clarifiers, an aerobic digester, two rotating biological contractors, a trickling filter, two final clarifiers, final contact tank, a sludge holding tank, and sludge drying beds. The treatment plant is designed to treat 250,000 gallons per day. The average daily flow is 190,000 gallons. The City has approximately 890 sewer accounts and the sewerage rates are below:
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| Waste Water Treatment Plant |
Cascade Sewer Rates Table
| Charges for Service | Monthly Rate |
| Senior Monthly Account Charge (head of house 65 or older) | $6.00/month |
| Monthly Account Charge | $11.00/month |
| Per 1,000 Gallon Charge | $2.00/1,000-gal |
| Occasional Sewerage Sales (Septic Tank Pumping) | $60.00/1,000-gal |
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