Marsing WWTP
Marsing, ID · Owyhee County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 0.3 MGD
- NPDES permit
- ID0021202
- Administratively continued
- Permit expires
- October 2020
- Population served
- 11,229
- CWNS 2022
Marsing WWTP is a publicly owned wastewater treatment works in Marsing, Owyhee County, Idaho, serving about 11,229 residents. Treatment on site includes aerated lagoons, covered lagoons, uncovered lagoons. It discharges under NPDES permit ID0021202 (administratively continued), which expires in October 2020, with 8 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
- 8
- Effluent violations
- 7
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
4 verified contacts for Marsing WWTP, with validated emails and direct phone numbers.
Unlock 4 verified contacts (1 more than shown)
Names, validated emails and direct phone numbers for decision-makers at Marsing WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Idaho
Greenleaf · 9 mi away
—
Homedale · 10 mi away
0.5 MGD
Wilder · 10 mi away
0.08 MGD
Nampa · 12 mi away
—
Notus · 12 mi away
—
Parma · 18 mi away
0.11 MGD
Star · 18 mi away
1.58 MGD
Meridian · 19 mi away
1.23 MGD
Marsing 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 9, 2025.