Plymouth Town Sanitary District #1 WWTF
Hanover, WI 53576 · Rock County · Publicly Owned Treatment Works
- Average flow
- 0.02 MGD
- Design flow
- 0.03 MGD
- NPDES permit
- WI0031054
- Expired
- Permit expires
- December 2019
- Population served
- 314
- CWNS 2022
Plymouth Town Sanitary District #1 WWTF is a publicly owned wastewater treatment works in Hanover, Rock County, Wisconsin treating an average of 0.02 million gallons per day against a permitted design capacity of 0.03 MGD, serving about 314 residents. It discharges under NPDES permit WI0031054 (expired), which expires in December 2019, with 1 recorded violation in the last three years.
Treatment technology
One treatment structure or unit process identified at Plymouth Town Sanitary District #1 WWTF.
Available with a free Klarifi account
See the full treatment train at Plymouth Town Sanitary District #1 WWTF: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 1
- Effluent violations
- 1
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Plymouth Town Sanitary District #1 WWTF.
No verified contacts on file yet
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Nearby wastewater treatment plants in Wisconsin
Footville · 4 mi away
0.08 MGD
Janesville · 4 mi away
11.03 MGD
Beloit · 7 mi away
0.58 MGD
Evansville · 12 mi away
0.15 MGD
Brodhead · 12 mi away
0.22 MGD
Beloit · 12 mi away
4.15 MGD
Edgerton · 14 mi away
0.53 MGD
Milton · 14 mi away
0.33 MGD
Plymouth Town Sanitary District #1 WWTF: frequently asked questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed October 26, 2026; facility record last updated November 7, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Biological nutrient removal · Tertiary treatment · all terms