Medical Lake WWTP
207 E Ellen Ave, Medical Lake, WA 99022 · Spokane County · Publicly Owned Treatment Works
- Average flow
- 0.38 MGD
- Design flow
- —
- NPDES permit
- WA0021148
- Administratively continued
- Permit expires
- July 2019
- Population served
- 5,620
- CWNS 2022
Medical Lake WWTP is a publicly owned wastewater treatment works in Medical Lake, Spokane County, Washington treating an average of 0.38 million gallons per day, serving about 5,620 residents. It discharges under NPDES permit WA0021148 (administratively continued), which expires in July 2019, with 13 recorded violations in the last three years. EPA has recorded 1 formal enforcement action naming the plant, the latest in March 2025.
Treatment technology
2 treatment structures and unit processes identified at Medical Lake WWTP.
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See the full treatment train at Medical Lake WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 13
- Effluent violations
- 13
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 Medical Lake WWTP in EPA's ICIS system.
- Formal actions
- 1
- 1 since FY2020
- Penalties assessed
- $1,050
- all cases
- Compliance actions
- $500
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Mar 2025
CITY OF MEDICAL LAKE RECLAIMED WATER FACILITY - ESA (CWA NPDES)
Administrative order · CWA, NPDES Permit Violations · Final Order With Penalty · Penalty $1,050 · Compliance actions $500
EPA's description of the case:
“On September 18, 2024, Region 10 filed an expedited settlement agreement resolving CWA violations of the City of Medical Lake's wastewater permit at its wastewater facility in Medical Lake,…”
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Source: EPA ECHO, civil enforcement case 10-2024-0139.
Full case history with a free Klarifi account
Every action against Medical Lake WWTP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
Decision-makers at Medical Lake WWTP.
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Nearby wastewater treatment plants in Washington
Reardan · 11 mi away
0.06 MGD
Spangle · 17 mi away
0.02 MGD
Davenport · 22 mi away
0.16 MGD
Rockford · 27 mi away
0.07 MGD
Fairfield · 27 mi away
0.06 MGD
Rosalia · 28 mi away
0.11 MGD
Saint John · 34 mi away
0.07 MGD
Tekoa · 37 mi away
0.12 MGD
Medical Lake 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 October 26, 2026; facility record last updated November 29, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Ozonation · Activated sludge · all terms