El Dorado, City Of- South Plant
325 Quail Crossing, Eldorado, AR 71730 · Union County · Publicly Owned Treatment Works
- Average flow
- 1.22 MGD
- Design flow
- 7 MGD
- NPDES permit
- AR0033723
- Effective
- Permit expires
- December 2028
- Population served
- 11,039
- CWNS 2022
El Dorado, City Of- South Plant is a publicly owned wastewater treatment plant in Eldorado, Union County, Arkansas treating an average of 1.22 million gallons per day against a permitted design capacity of 7 MGD, serving about 11,039 residents. It discharges under NPDES permit AR0033723 (effective), which expires in December 2028, with 26 recorded violations in the last three years.
Treatment technology
One treatment structure or unit process identified at El Dorado, City Of- South Plant.
Available with a free Klarifi account
See the full treatment train at El Dorado, City Of- South Plant: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 26
- Effluent violations
- 26
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
2 verified contacts for El Dorado, City Of- South Plant, with validated emails and direct phone numbers.
Unlock 2 verified contacts
Names, validated emails and direct phone numbers for decision-makers at El Dorado, City Of- South Plant, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Arkansas
Eldorado · 6 mi away
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Norphlet · 9 mi away
0.02 MGD
Junction City · 11 mi away
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Calion · 13 mi away
0.04 MGD
Smackover · 14 mi away
0.15 MGD
Louann · 17 mi away
—
Strong · 19 mi away
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Hampton · 27 mi away
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El Dorado, City Of- South Plant: 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 14, 2026; facility record last updated February 16, 2025.