Clean Water Act discharge permit · NPDES TX0138134

CHARLESTON MUD WWTP, Arcola, TX: NPDES TX0138134 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
8Pollutants under a numeric limit
1Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

CHARLESTON MUD WWTP, held by CHARLESTON MUD, holds NPDES permit TX0138134, which discharges to Roadside Ditch;Brazoira Co Drainage Ditch E101-00-. EPA’s file records it issued September 20, 2018 and expiring September 20, 2023.

CHARLESTON MUD WWTP, Arcola, Texas: Individual permit TX0138134, held by CHARLESTON MUD; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued September 20, 2018, term to September 20, 2023; discharges to ROADSIDE DITCH;BRAZOIRA CO DRAINAGE DITCH E101-00-.

Solids, total suspended: 3 limits, 8 violations of any kind, 2 effluent exceedances, latest February 28, 2025, largest 7% over the limit.
Nitrogen, ammonia total [as N]: 3 limits, 6 violations of any kind, 0 effluent exceedances.
BOD, carbonaceous [5 day, 20 C]: 3 limits, 6 violations of any kind, 0 effluent exceedances.
pH: 2 limits, 4 violations of any kind, 0 effluent exceedances.
Flow, in conduit or thru treatment plant: 2 limits, 4 violations of any kind, 0 effluent exceedances.
Chlorine, total residual: 2 limits, 4 violations of any kind, 0 effluent exceedances.
E. coli: 2 limits, 2 violations of any kind, 0 effluent exceedances.
Oxygen, dissolved [DO]: 1 limit, 2 violations of any kind, 0 effluent exceedances.

April 23, 2024: Permit Violations - Violation Specified in Comment (ST6).

Texas holds 1,720 Publicly owned treatment works coverages of this permit type in EPA’s file; 879 were issued before TX0138134.

Coverages issued nearest TX0138134

September 14, 2018: SABINE PASS WWTP, Sabine Pass, TX0024201, held by PORT ARTHUR, CITY OF
September 14, 2018: SANTA CLARA CREEK 1 WWTP, Seguin, TX0136352, held by GREEN VALLEY SPECIAL UTILITY DISTRICT
September 17, 2018: HARRIS COUNTY MUD 8 WWTP, Houston, TX0075698, held by HARRIS COUNTY MUD 8
September 20, 2018: RIVER PLANTATION MUD WWTF, Conroe, TX0025674, held by RIVER PLANTATION MUD
September 20, 2018: ANGLETON WWTP, Angleton, TX0056316, held by CITY OF ANGLETON
September 27, 2018: STILL CREEK WWTP, Bryan, TX0025071, held by BRYAN, CITY OF
September 27, 2018: CITY OF HIDALGO WWTP, Hidalgo, TX0058386, held by HIDALGO, CITY OF
September 27, 2018: SILVERLAKE WWTP, Pearland, TX0086118, held by BRAZORIA COUNTY MUD 3
September 27, 2018: FOREST COVE WWTP, Kingwood, TX0115924, held by CITY OF HOUSTON
September 27, 2018: ALABAMA COUSHATTA TRIBE OF TX, Livingston, TX0127582

CHARLESTON MUD WWTP among its neighbors

EPA’s permit file holds 288 discharge permits in the Mustang Bayou subwatershed (HUC 120402040400), TX0138134 among them. Its county holds 1,100, 41 of them major permits; TX0138134 is a minor permit.

Other permits in the Mustang Bayou subwatershed (HUC 120402040400)

2006 MUSTANG CREEK DEVELOPMENT WWTP, Manvel: TXR1519OF, minor permit, discharging to MUSTANG BAYOU, permit term to March 4, 2028
AAA STORAGE FM 521, Rosharon: TXR1522TW, minor permit, discharging to WEST FORK CHOCOLATE BAYOU, permit term to March 4, 2028
AGUA ESTATES SUBDIVISION, Houston: TXR1585OK, minor permit, discharging to SIMS BAYOU, permit term to March 4, 2028
ALAMO CONCRETE PRODUCTS, Iowa Colony: TXG113212, minor permit, permit term to November 6, 2026
ALLDAY AUTO PARTS, Houston: TXR05GF67, minor permit, permit term to August 13, 2026
ALLIED PETROCHEMICAL TEXAS, Alvin: TXR05FY24, minor permit, permit term to August 13, 2026
ALVIN 1460 AC TRACT WWTP, Alvin: TX0147141, not classed
ALVIN 350 WWTP, Alvin: TX0147761, minor permit, discharging to Chocolate Bayou Above Tidal, permit term to May 4, 2031
ALVIN CHEMICAL, Alvin: TXRNECK50, minor permit, permit term to August 13, 2026
ALVIN HIGH SCHOOL EXPANSION & RENOVATIONS, Alvin: TXR1554YD, minor permit, discharging to NEW BAYOU, permit term to March 4, 2028

Identity

Facility as filed	CHARLESTON MUD WWTP
Permittee as filed	CHARLESTON MUD
NPDES ID	TX0138134
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Program	Publicly owned treatment works
Issued	September 20, 2018
Expiration date	September 20, 2023
Address	Arcola, TX 78753
Receiving water	ROADSIDE DITCH;BRAZOIRA CO DRAINAGE DITCH E101-00-
Subwatershed	Mustang Bayou (HUC 120402040400)

Effluent limits and exceedances

8Pollutants on file
8Under a numeric limit
8With a violation of any kind
1With an effluent exceedance

An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.

Pollutant or measure	Limits	Violations, any kind	Effluent exceedances	Latest exceedance	Largest exceedance, as filed
Solids, total suspended	3	8	2	February 28, 2025	7% over the limit
Nitrogen, ammonia total [as N]	3	6	0
BOD, carbonaceous [5 day, 20 C]	3	6	0
pH	2	4	0
Flow, in conduit or thru treatment plant	2	4	0
Chlorine, total residual	2	4	0
E. coli	2	2	0
Oxygen, dissolved [DO]	1	2	0

Inspections, violations and enforcement

1Single-event violations

Date	What EPA recorded	Agency
April 23, 2024	Permit Violations - Violation Specified in Comment	ST6

Inspections

EPA’s inspection file holds no inspection for NPDES TX0138134.

Formal enforcement and penalties

0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.

Informal enforcement

EPA’s informal enforcement file holds no action for NPDES TX0138134.

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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

This public-records page covers Clean Water Act discharge permit NPDES TX0138134 for CHARLESTON MUD WWTP in Arcola, TX, held by CHARLESTON MUD, with the permit status listed as administratively continued and the discharger class as Minor. The page lists 1 pollutant under a numeric limit and 1 pollutant with an effluent exceedance, out of 8 pollutants on file, with the permit issued September 20, 2018 and expiring September 20, 2023.