Cottage Grove water and sewer rates
Who supplies water to Cottage Grove houses, what it costs, and how the sewer charge works.
City of Cottage Grove
City of Cottage Grove, billed monthly on the city utility bill
| Use a month | Price per 1,000 gallons |
|---|---|
| Fixed charge | $3.72 a month |
| 0 to 6 thousand gallons | $1.29 |
| 6 to 9 thousand gallons | $1.95 |
| 9 to 12 thousand gallons | $2.90 |
| 12 to more | $4.37 |
- Source
- Groundwater from 13 wells, 284 to 475 feet deep, in the Jordan aquifer
- Hardness
- 298 ppm, or 17 grains
- PFAS
- In 2025 the City supplied only water treated for PFAS; PFOA results ranged from 0 to 2.6 ppt, with a highest average or single result of 1.9 ppt (EPA limit 4.0 ppt). Five interim treatment plants remove PFAS, the Low Zone Water Treatment Plant started in June 2025, and the work is fully funded by the 3M Settlement
- Lead
- The 90th-percentile lead result was 1.5 ppb, with 0 of 30 homes over the action level; the Nov. 5, 2025 service line inventory listed 0 lead lines and 489 of unknown material
Sewer
Cottage Grove bills residential sewer monthly: a $5.41 base charge plus $4.78 per 1,000 gallons. Winter water use (December, January and February) sets a winter average, and from the April bill sewer usage is based on the lower of the winter average or actual water usage.
Other charges on the utility bill
- Stormwater (single-family home): $6.66 a month
- Street lights (city-owned, residential lot): $6.83 a month
Sources
Checked October 21, 2026. Every number here comes from the public sources listed, matched by our checker.
Rates change every year; this page shows when it was last checked. Nothing here is legal, tax or insurance advice.