Calion WWTP
West Of Highway 167, Calion, AR 71724 · Union County · Publicly Owned Treatment Works
- Average flow
- 0.03 MGD
- Design flow
- 0.11 MGD
- NPDES permit
- AR0038211
- Effective
- Permit expires
- May 2028
- Population served
- 433
- CWNS 2022
Calion WWTP is a publicly owned wastewater treatment works in Calion, Union County, Arkansas treating an average of 0.03 million gallons per day against a permitted design capacity of 0.11 MGD, serving about 433 residents. It discharges under NPDES permit AR0038211 (effective), which expires in May 2028, with 0 recorded violations in the last three years.
Treatment technology
One treatment structure or unit process identified at Calion WWTP.
Available with a free Klarifi account
See the full treatment train at Calion 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 Calion WWTP in EPA's ICIS system.
- Formal actions
- 0
- none on record
- EPA inspections
- 0
- none on record
No formal federal enforcement case is on record for this plant.
1 informal enforcement action (notices of violation and similar).
Full case history with a free Klarifi account
Every action against Calion WWTP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
Decision-makers at Calion WWTP.
No verified contacts on file yet
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Nearby wastewater treatment plants in Arkansas
Norphlet · 7 mi away
0.02 MGD
Smackover · 11 mi away
0.13 MGD
Eldorado · 13 mi away
1.28 MGD
Harrell · 14 mi away
0.06 MGD
Hampton · 14 mi away
0.2 MGD
Louann · 15 mi away
0.02 MGD
Eldorado · 16 mi away
0.02 MGD
Strong · 19 mi away
0.11 MGD
Calion 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 July 25, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · FOG · Equalization tank · all terms