Pasco WWTP
1015 S Grey Ave, Pasco, WA 99301 · Franklin County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- —
- NPDES permit
- WAR312101
- Terminated
- Permit expires
- December 2025
- Population served
- 86,550
- CWNS 2022
Pasco WWTP is a publicly owned wastewater treatment works in Pasco, Franklin County, Washington, serving about 86,550 residents. It discharges under NPDES permit WAR312101 (terminated), which expires in December 2025, with 0 recorded violations in the last three years.
Treatment technology
3 treatment structures and unit processes identified at Pasco WWTP.
Available with a free Klarifi account
See the full treatment train at Pasco WWTP: 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.
Key contacts
2 verified contacts for Pasco WWTP, with validated emails and direct phone numbers.
Unlock 2 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Pasco WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Washington
Richland · 9 mi away
5.91 MGD
Benton City · 19 mi away
0.23 MGD
Prosser · 32 mi away
0.74 MGD
Walla Walla · 35 mi away
0.87 MGD
Walla Walla · 36 mi away
—
Grandview · 40 mi away
0.93 MGD
Othello · 42 mi away
0.89 MGD
Mabton · 43 mi away
0.15 MGD
Pasco 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 19, 2026; facility record last updated March 1, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Oxidation ditch · Anaerobic digester · all terms