Yakima Regional Wastewater Facility
2220 E Viola Ave, Yakima, WA 98901 · Yakima County · Publicly Owned Treatment Works
- Average flow
- 8.67 MGD
- Design flow
- —
- NPDES permit
- WA0024023
- Effective
- Permit expires
- March 2029
- Population served
- 120,355
- CWNS 2022
Yakima Regional Wastewater Facility is a publicly owned wastewater treatment works in Yakima, Yakima County, Washington treating an average of 8.67 million gallons per day, serving about 120,355 residents. It discharges under NPDES permit WA0024023 (effective), which expires in March 2029, with 2 recorded violations in the last three years. EPA has recorded 2 formal enforcement actions naming the plant, the latest in April 2007.
Treatment technology
4 treatment structures and unit processes identified at Yakima Regional Wastewater Facility.
Available with a free Klarifi account
See the full treatment train at Yakima Regional Wastewater Facility: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 2
- Effluent violations
- 2
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 Yakima Regional Wastewater Facility in EPA's ICIS system.
- Formal actions
- 2
- 0 since FY2020
- Penalties assessed
- $6,575
- all cases
- Compliance actions
- $2,100
- required by EPA orders
- EPA inspections
- 1
- latest Jun 2006
Latest case · Apr 2007
CITY OF YAKIMA
Administrative order · CAA, Prevention of Accidental Release/Risk Management Plans (RMPs) · Final Order With Penalty · Penalty $4,575 · Compliance actions $100
Source: EPA ECHO, civil enforcement case 10-2007-0008.
Full case history with a free Klarifi account
Every action against Yakima Regional Wastewater Facility with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Capital improvement projects in Yakima
Yakima's capital improvement plan lists 38 water, sewer and wastewater line items worth $84M starting 2023–2029. The largest budgeted items are shown here.
All water and sewer capital projects in Yakima →
| Project | Budget | Years |
|---|---|---|
| Activated Sludge System Improvements | $21,000,000 | 2027–2028 |
| Collection System Rehabilitation | $13,000,000 | 2024–2029 |
| Biosolids Dewatering Improvements | $7,000,000 | 2023–2025 |
| Services & Pass-Through Payments | $4,800,000 | 2024–2029 |
| Headworks Compactor Replacement | $4,775,000 | 2026–2026 |
Full project details — scope, funding source, engineering consultant and the decision-makers behind each project — are available in Klarifi, along with similar wastewater capital projects in other cities.
Key contacts
10 verified contacts for Yakima Regional Wastewater Facility, with validated emails and direct phone numbers.
Unlock 10 verified contacts (7 more than shown)
Names, validated emails and direct phone numbers for decision-makers at Yakima Regional Wastewater Facility, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Washington
Harrah · 13 mi away
0.03 MGD
Zillah · 13 mi away
0.08 MGD
Naches · 15 mi away
0.54 MGD
Toppenish · 16 mi away
0.09 MGD
Zillah · 16 mi away
0.2 MGD
Toppenish · 17 mi away
0.66 MGD
Granger · 21 mi away
0.17 MGD
Ellensburg · 27 mi away
3.59 MGD
Yakima Regional Wastewater Facility: 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 July 3, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · WWTP · Biosolids · all terms