Amity STP
Amity, OR · Yamhill County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 0.9 MGD
- NPDES permit
- OR0026212
- Effective
- Permit expires
- February 2030
- Population served
- 1,747
- CWNS 2022
Amity STP is a publicly owned wastewater treatment works in Amity, Yamhill County, Oregon, serving about 1,747 residents. Treatment on site includes aerated lagoons, uncovered lagoons. It discharges under NPDES permit OR0026212 (effective), which expires in February 2030, with 34 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Compliance snapshot (last 3 years)
- Total violations
- 34
- Effluent violations
- 22
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Amity STP.
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Nearby wastewater treatment plants in Oregon
Mcminnville · 7 mi away
2.73 MGD
Sheridan · 9 mi away
—
Lafayette · 9 mi away
0.27 MGD
Dayton · 10 mi away
0.16 MGD
Salem · 10 mi away
24.62 MGD
Carlton · 12 mi away
0.2 MGD
Brooks · 12 mi away
0.05 MGD
Willamina · 14 mi away
0.1 MGD
Amity STP: 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 April 24, 2025.