Merced WWTF
Merced, CA · Merced County · Publicly Owned Treatment Works
- Average flow
- 1.87 MGD
- Design flow
- 20 MGD
- NPDES permit
- CA0079219
- Expired
- Permit expires
- May 2025
- Population served
- 83,700
- CWNS 2022
Merced WWTF is a publicly owned wastewater treatment works in Merced, Merced County, California treating an average of 1.87 million gallons per day against a permitted design capacity of 20 MGD, serving about 83,700 residents. Treatment on site includes clarifiers, uncovered lagoons, biogas silos, biogas balloons. It discharges under NPDES permit CA0079219 (expired), which expires in May 2025, with 5 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Clarifiers
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Uncovered lagoons
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Biogas silos
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Biogas balloons
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Compliance snapshot (last 3 years)
- Total violations
- 5
- Effluent violations
- 5
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Capital improvement projects in Merced
Merced's capital improvement plan lists 66 water, sewer and wastewater line items worth $176M starting 2024–2029. The largest budgeted items are shown here.
All water and sewer capital projects in Merced →
| Project | Budget | Years |
|---|---|---|
| 16 Inch Water Main | $49,000,000 | 2029–2031 |
| WWTP Phase VI Solids Handling Facilities | $20,000,000 | 2027–2028 |
| Surface Water Treatment Plant | $16,755,000 | 2029–2031 |
| 10 MGD Water Treatment Plant Location TBD | $16,755,000 | 2029–2031 |
| Gerard Sewer Trunk Line | $7,000,000 | 2026–2027 |
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
3 verified contacts for Merced WWTF, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Merced WWTF, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in California
Atwater · 6 mi away
—
Turlock · 25 mi away
—
Mariposa · 35 mi away
0.16 MGD
Copperopolis · 45 mi away
0.39 MGD
Manteca · 55 mi away
5.18 MGD
Gilroy · 59 mi away
—
Clovis · 59 mi away
0.15 MGD
Tracy · 60 mi away
8.9 MGD
Merced WWTF: 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 March 6, 2025.