Brewster STP
603 S 5th St, Brewster, WA 98812 · Okanogan County · Publicly Owned Treatment Works
- Average flow
- 0.16 MGD
- Design flow
- 1.22 MGD
- NPDES permit
- WA0021008
- Administratively continued
- Permit expires
- January 2021
- Population served
- 2,589
- CWNS 2022
Brewster STP is a publicly owned wastewater treatment works in Brewster, Okanogan County, Washington treating an average of 0.16 million gallons per day against a permitted design capacity of 1.22 MGD, serving about 2,589 residents. It discharges under NPDES permit WA0021008 (administratively continued), which expires in January 2021, with 0 recorded violations in the last three years.
Treatment technology
2 treatment structures and unit processes identified at Brewster STP.
Available with a free Klarifi account
See the full treatment train at Brewster STP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 0
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for Brewster STP in EPA's ICIS system.
- Formal actions
- 0
- none on record
- EPA inspections
- 1
- latest Aug 2013
No formal federal enforcement case is on record for this plant.
Full case history with a free Klarifi account
Every action against Brewster STP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
Decision-makers at Brewster STP.
No verified contacts on file yet
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Nearby wastewater treatment plants in Washington
Bridgeport · 7 mi away
0.15 MGD
Okanogan · 20 mi away
0.16 MGD
Chelan · 21 mi away
0.75 MGD
Twisp · 24 mi away
0.07 MGD
Omak · 24 mi away
0.54 MGD
Winthrop · 32 mi away
0.05 MGD
Entiat · 35 mi away
0.1 MGD
Grand Coulee · 38 mi away
0.2 MGD
Brewster 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 October 26, 2026; facility record last updated November 20, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Sludge dewatering · Biological nutrient removal · all terms