Richland City Wastewater Lab
Richland, WA · Benton County · Publicly Owned Treatment Works
- Average flow
- 6.31 MGD
- Design flow
- 22.8 MGD
- NPDES permit
- WA0020419
- Expired
- Permit expires
- September 2021
- Population served
- 56,193
- CWNS 2022
Richland City Wastewater Lab is a publicly owned wastewater treatment works in Richland, Benton County, Washington treating an average of 6.31 million gallons per day against a permitted design capacity of 22.8 MGD, serving about 56,193 residents. Treatment on site includes clarifiers, biogas silos. It discharges under NPDES permit WA0020419 (expired), which expires in September 2021, with 0 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
- 0
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Capital improvement projects in Richland
Richland's capital improvement plan lists 19 water, sewer and wastewater line items worth $83M starting 2025–2026. The largest budgeted items are shown here.
All water and sewer capital projects in Richland →
| Project | Budget | Years |
|---|---|---|
| Downtown Connectivity Transportation Improvements | $23,550,000 | 2025–2026 |
| Wastewater Treatment Plant Anaerobic Digester Improvements | $11,370,000 | 2025–2027 |
| Wastewater Collection System Rehabilitation and Replacement Program | $8,120,000 | 2025–2028 |
| Horn Rapids Irrigation Water System Upgrades | $6,325,000 | 2025–2026 |
| Water Distribution System Repairs and Replacements | $6,200,000 | 2025–2028 |
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
1 verified contact for Richland City Wastewater Lab, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at Richland City Wastewater Lab, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Washington
Benton City · 10 mi away
0.22 MGD
Prosser · 23 mi away
—
Grandview · 31 mi away
—
Mabton · 34 mi away
—
Sunnyside · 36 mi away
1.17 MGD
Sunnyside · 36 mi away
1.31 MGD
Othello · 39 mi away
1.27 MGD
Granger · 44 mi away
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Richland City Wastewater Lab: 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 April 13, 2025.