Moscow STP
2221 W Pullman Rd, Moscow, ID 83843 · Latah County · Publicly Owned Treatment Works
- Average flow
- 1.84 MGD
- Design flow
- 4 MGD
- NPDES permit
- ID0021491
- Effective
- Permit expires
- January 2031
- Population served
- 25,702
- CWNS 2022
Moscow STP is a publicly owned wastewater treatment works in Moscow, Latah County, Idaho treating an average of 1.84 million gallons per day against a permitted design capacity of 4 MGD, serving about 25,702 residents. It discharges under NPDES permit ID0021491 (effective), which expires in January 2031, with 0 recorded violations in the last three years. EPA has recorded 2 formal enforcement actions naming the plant, the latest in July 2007.
Treatment technology
2 treatment structures and unit processes identified at Moscow STP.
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See the full treatment train at Moscow 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 Moscow STP in EPA's ICIS system.
- Formal actions
- 2
- 0 since FY2020
- Penalties assessed
- $134,050
- all cases
- Compliance actions
- $1.9M
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Jul 2007
CITY OF MOSCOW
Administrative order · CWA, NPDES Permit Violations · Final Order With Penalty · Penalty $134,000 · Compliance actions $1.9M
EPA's description of the case:
“Region issued the City an OTC letter for effluent violations of the NPDES permit. The parameters in violation were, total residual chlorine (TRC), dissolved oxygen (DO), phosphorus, and fecal…”
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Source: EPA ECHO, civil enforcement case 10-2007-0114.
Full case history with a free Klarifi account
Every action against Moscow STP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
Decision-makers at Moscow STP.
No verified contacts on file yet
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Nearby wastewater treatment plants in Idaho
Viola · 7 mi away
—
Troy · 13 mi away
0.07 MGD
Genesee · 14 mi away
0.3 MGD
Genesee · 14 mi away
—
Potlatch · 14 mi away
0.16 MGD
Princeton · 15 mi away
—
Juliaetta · 19 mi away
0.03 MGD
Kendrick · 19 mi away
0.03 MGD
Moscow 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 August 11, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Lift station · Sludge dewatering · all terms