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City Of Ennis Wastewater Treatment Plant

401 West Plant Road, Ennis, TX 75119 · Ellis County · Publicly Owned Treatment Works

Average flow
3.87 MGD
Design flow
4 MGD
NPDES permit
TX0047261
Effective
Permit expires
July 2028
Population served
21,124
CWNS 2022

City Of Ennis Wastewater Treatment Plant is a publicly owned wastewater treatment works in Ennis, Ellis County, Texas treating an average of 3.87 million gallons per day against a permitted design capacity of 4 MGD, serving about 21,124 residents. It discharges under NPDES permit TX0047261 (effective), which expires in July 2028, with 3 recorded violations in the last three years. EPA has recorded 3 formal enforcement actions naming the plant, the latest in October 2005.

Treatment technology

9 treatment structures and unit processes identified at City Of Ennis Wastewater Treatment Plant.

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See the full treatment train at City Of Ennis Wastewater Treatment Plant: structures, unit processes and planned upgrades, with exact unit counts.

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Compliance snapshot (last 3 years)

Total violations
3
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 Ennis Wastewater Treatment Plant in EPA's ICIS system.

Formal actions
3
0 since FY2020
Penalties assessed
$2,980
all cases
Compliance actions
$1,000
required by EPA orders
EPA inspections
2
latest Mar 2005

Latest case · Oct 2005

Ennis, City of

Administrative order · SDWA, Intentional Acts · Unilateral Administrative Order Without Adjudication · Compliance actions $1,000

EPA's description of the case:

“Failed to submit vulnerability assessment report”

Source: EPA ECHO, civil enforcement case 06-2005-1325.

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Every action against City Of Ennis Wastewater Treatment Plant with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.

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Key contacts

31 verified contacts for City Of Ennis Wastewater Treatment Plant, with validated emails and direct phone numbers.

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Names, validated emails and direct phone numbers for decision-makers at City Of Ennis Wastewater Treatment Plant, plus the full compliance history and discharge data.

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Nearby wastewater treatment plants in Texas

City Of Ennis Water Treatment Plant

Ennis · 3 mi away

0.3 MGD

City Of Palmer WWTP

Palmer · 9 mi away

0.48 MGD

City Of Blooming Grove WWTP

Blooming Grove · 15 mi away

0.08 MGD

City Of Italy

Italy · 17 mi away

0.24 MGD

City Of Corsicana Landfill

Corsicana · 19 mi away

3.85 MGD

City Of Frost WWTF

Frost · 19 mi away

0.05 MGD

Red Oak Creek Regional WWTP

Red Oak · 20 mi away

7.15 MGD

Scurry-Rosser WWTF

Scurry · 20 mi away

0.0019 MGD

City Of Ennis Wastewater Treatment 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 October 26, 2026; facility record last updated April 12, 2025.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Centrate · Ozonation · all terms


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