La Co., Sanitation Dist
295 Humane Way, Pomona, CA 91766 · Los Angeles County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 15 MGD
- NPDES permit
- CA0053619
- Administratively continued
- Permit expires
- July 2026
- Population served
- 311,175
- CWNS 2022
La Co., Sanitation Dist is a publicly owned wastewater treatment plant in Pomona, Los Angeles County, California, serving about 311,175 residents. It discharges under NPDES permit CA0053619 (administratively continued), which expires in July 2026, with 11 recorded violations in the last three years.
Treatment technology
Treatment structures and unit processes at La Co., Sanitation Dist.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 11
- Effluent violations
- 3
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for La Co., Sanitation Dist, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at La Co., Sanitation Dist, plus the full compliance history and discharge data.
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Corona · 15 mi away
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South El Monte · 16 mi away
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Pico Rivera · 16 mi away
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Riverside · 20 mi away
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Long Beach · 24 mi away
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Colton · 25 mi away
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La Co., Sanitation Dist: 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 September 30, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Biosolids · Filter press · all terms