Sheridan WWTP
Sheridan, OR · Yamhill County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 0.42 MGD
- NPDES permit
- OR0020648
- Effective
- Permit expires
- September 2028
- Population served
- 6,168
- CWNS 2022
Sheridan WWTP is a publicly owned wastewater treatment works in Sheridan, Yamhill County, Oregon, serving about 6,168 residents. Treatment on site includes uncovered lagoons. It discharges under NPDES permit OR0020648 (effective), which expires in September 2028, with 19 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Uncovered lagoons
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Compliance snapshot (last 3 years)
- Total violations
- 19
- Effluent violations
- 13
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Sheridan WWTP.
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Nearby wastewater treatment plants in Oregon
Willamina · 5 mi away
0.1 MGD
Amity · 9 mi away
—
Grand Ronde · 11 mi away
0.02 MGD
Rickreall · 13 mi away
1.42 MGD
Mcminnville · 14 mi away
2.73 MGD
Falls City · 16 mi away
0.009 MGD
Carlton · 17 mi away
0.2 MGD
Lafayette · 17 mi away
0.27 MGD
Sheridan WWTP: 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 September 11, 2026; facility record last updated February 14, 2025.