What is the address of Oso WWTP?

The address on the plant’s EPA facility record is 601 Nile Drive, Corpus Christi, TX 78469, in Nueces County. Its coordinates are 27.7102, -97.3406. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Oso WWTP treat?

Oso WWTP treats an average of 21.26 MGD and is permitted for a design flow of 24 MGD.

Has Oso WWTP been subject to EPA enforcement action?

EPA's enforcement records list 2 formal civil enforcement cases naming Oso WWTP, 0 since fiscal year 2020. The latest case reached its current status in September 2025 (judicial case, final order with penalty). Penalties assessed across the cases total $1,136,000. The full case history, with milestones, violation types and EPA's case summaries, is shown in Klarifi with a free account.

What treatment technology does Oso WWTP use?

Klarifi has identified one treatment structure or unit process at the Corpus Christi facility. The full treatment train, with exact unit counts, is shown in Klarifi with a free account.

What is the NPDES permit for Oso WWTP?

The facility discharges under NPDES permit TX0047058, currently administratively continued, expiring September 2025.

Is Oso WWTP in compliance?

Discharge monitoring reports show 1 violation at Oso WWTP in the last three years, 1 of them effluent limit exceedances. The full history is available in Klarifi.

Are there capital improvement projects planned in Corpus Christi, TX?

Yes. Corpus Christi's capital improvement plan lists 110 water, sewer and wastewater projects worth $3.4B starting between 2025 and 2034. Line items and the people behind them are in Klarifi.

Who operates Oso WWTP and how do I contact them?

Oso WWTP is a publicly owned treatment works in Corpus Christi, Texas. Klarifi lists 6 verified decision-maker contacts for this facility, available with a free trial.

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Oso WWTP

601 Nile Drive, Corpus Christi, TX 78469 · Nueces County · Publicly Owned Treatment Works

Average flow: 21.26 MGD

Design flow: 24 MGD

NPDES permit: TX0047058; Administratively continued

Permit expires: September 2025

Population served: 133,576; CWNS 2022

Oso WWTP is a publicly owned wastewater treatment works in Corpus Christi, Nueces County, Texas treating an average of 21.26 million gallons per day against a permitted design capacity of 24 MGD, serving about 133,576 residents. It discharges under NPDES permit TX0047058 (administratively continued), which expires in September 2025, with 1 recorded violation in the last three years. EPA has recorded 2 formal enforcement actions naming the plant, the latest in September 2025.

Treatment technology

One treatment structure or unit process identified at Oso WWTP.

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See the full treatment train at Oso WWTP: structures, unit processes and planned upgrades, with exact unit counts.

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Compliance snapshot (last 3 years)

Total violations: 1

Effluent violations: 1

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 Oso WWTP in EPA's ICIS system.

Formal actions: 2; 0 since FY2020

Penalties assessed: $1.1M; all cases

Compliance actions: $800M; required by EPA orders

EPA inspections: 0; none on record

Latest case · Sep 2025

Corpus Christi, City of

Judicial case · CWA, NPDES Permit Violations · Final Order With Penalty · Penalty $1.1M · Compliance actions $800M · The case also names 3 other plants, and its amounts cover all of them

EPA's description of the case:

“Consent decree issued for violations of permit effluent limits and SSOs”

Source: EPA ECHO, civil enforcement case 06-2011-1897.

Full case history with a free Klarifi account

Every action against Oso WWTP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.

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Capital improvement projects in Corpus Christi

Corpus Christi's capital improvement plan lists 110 water, sewer and wastewater line items worth $3.4B starting 2025–2034. The largest budgeted items are shown here.

All water and sewer capital projects in Corpus Christi →

Project	Budget	Years
Seawater Desalination (Inner Harbor Plant)	$641,138,000	2025–2027
City-Wide Wastewater ID/IQ	$221,650,000	2025–2034
City-Wide Water Line Repair/Replacement - Large Diameter	$160,350,000	2025–2034
City-Wide Water Line Repair/Replacement - Small Diameter	$159,750,000	2025–2034
City-Wide Collection Capacity Remediation	$107,900,000	2025–2033

Full project details — scope, funding source, engineering consultant and the decision-makers behind each project — are available in Klarifi, along with similar wastewater capital projects in other cities.

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Key contacts

6 verified contacts for Oso WWTP, with validated emails and direct phone numbers.

Unlock 6 verified contacts (3 more than shown)

Names, validated emails and direct phone numbers for decision-makers at Oso WWTP, plus the full compliance history and discharge data.

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Nearby wastewater treatment plants in Texas

Laguna Madre WWTP

Corpus Christi · 5 mi away

2.28 MGD

City Of Corpus Christi

Corpus Christi · 7 mi away

4.83 MGD

Whitecap WWTP

Corpus Christi · 9 mi away

1.35 MGD

City Of Ingleside WWTP

Ingleside · 13 mi away

1.2 MGD

Gregory STP

Gregory · 15 mi away

0.26 MGD

Aransas Pass WWTP

Aransas Pass · 17 mi away

1.45 MGD

North Mustang Island WWTP

Port Aransas · 18 mi away

1.6 MGD

City Of Taft Baird WWTF

Taft · 19 mi away

0.51 MGD

Oso 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 May 27, 2025.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · WWTP · Biosolids · all terms

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