City Of Somerton - WWTP
110 S State Ave, Somerton, AZ 85350 · Yuma County · Publicly Owned Treatment Works
- Average flow
- 0.74 MGD
- Design flow
- 1.8 MGD
- NPDES permit
- AZ0026603
- Effective
- Permit expires
- December 2029
- Population served
- —
- CWNS 2022
City Of Somerton - WWTP is a publicly owned wastewater treatment works in Somerton, Yuma County, Arizona treating an average of 0.74 million gallons per day against a permitted design capacity of 1.8 MGD. It discharges under NPDES permit AZ0026603 (effective), which expires in December 2029, with 0 recorded violations in the last three years. EPA has recorded 2 formal enforcement actions naming the plant, the latest in August 2002.
Treatment technology
One treatment structure or unit process identified at City Of Somerton - WWTP.
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See the full treatment train at City Of Somerton - 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.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for City Of Somerton - WWTP in EPA's ICIS system.
- Formal actions
- 2
- 0 since FY2020
- Compliance actions
- $4.2M
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Aug 2002
City of Somerton
Administrative order · CWA, Violation of Existing AO · Unilateral Administrative Order Without Adjudication · Compliance actions $4.2M
EPA's description of the case:
“'This is an Administrative Compliance Order issued to the City of Somerton. The violation involves biological oxygen demand (BOD), total suspended solids (TSS), and storm sewer overflow (SSO)…”
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Source: EPA ECHO, civil enforcement case 09-2002-0061.
Full case history with a free Klarifi account
Every action against City Of Somerton - WWTP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
2 verified contacts for City Of Somerton - WWTP, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at City Of Somerton - WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Arizona
Yuma · 10 mi away
7.28 MGD
Yuma · 11 mi away
0.09 MGD
Quartzsite · 82 mi away
0.2 MGD
Parker · 110 mi away
0.48 MGD
Gila Bend · 118 mi away
0.22 MGD
Buckeye · 135 mi away
1.91 MGD
Buckeye · 135 mi away
0.22 MGD
Buckeye · 140 mi away
2.13 MGD
City Of Somerton - 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 26, 2026; facility record last updated November 3, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Ozonation · Activated sludge · all terms