Clean Water Act discharge permit · NPDES TX0068357

MONTICELLO LIGNITE MINING AREA, Mount Pleasant, TX: NPDES TX0068357 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
11Pollutants under a numeric limit
2Pollutants with an effluent exceedance
2Inspections on file
0Formal enforcement actions

MONTICELLO LIGNITE MINING AREA, held by LUMINANT MINING COMPANY LLC, holds NPDES permit TX0068357, which discharges to Cypress Creek River Seg. No. 0408. EPA’s file records it issued May 13, 2019 and expiring May 13, 2024.

MONTICELLO LIGNITE MINING AREA, Mount Pleasant, Texas: Individual permit TX0068357, held by LUMINANT MINING COMPANY LLC; Administratively continued (past its expiration date and still in force until reissued); issued May 13, 2019, term to May 13, 2024; discharges to CYPRESS CREEK RIVER SEG. NO. 0408.

Iron, total [as Fe]: 26 limits, 36 violations of any kind, 2 effluent exceedances, latest July 31, 2004, largest 40% over the limit.
Selenium, total [as Se]: 13 limits, 24 violations of any kind, 1 effluent exceedance, latest October 31, 2009, largest 11% over the limit.
Flow, in conduit or thru treatment plant: 72 limits, 59 violations of any kind, 0 effluent exceedances.
Solids, total suspended: 30 limits, 46 violations of any kind, 0 effluent exceedances.
pH: 72 limits, 44 violations of any kind, 0 effluent exceedances.
BOD, 5-day, 20 deg. C: 4 limits, 12 violations of any kind, 0 effluent exceedances.
Solids, settleable: 21 limits, 11 violations of any kind, 0 effluent exceedances.
Chlorine, total residual: 2 limits, 7 violations of any kind, 0 effluent exceedances.
Aluminum, total [as Al]: 13 limits, 3 violations of any kind, 0 effluent exceedances.
E. coli: 4 limits, 0 violations of any kind, 0 effluent exceedances.
Oil & Grease: 2 limits, 0 violations of any kind, 0 effluent exceedances.

May 4, 2026: Follow-Up (S).
March 19, 2026: Follow-Up (S).

Other permits held by LUMINANT MINING COMPANY LLC

BIG BROWN AND TURLINGTON LIGNITE MINING AREAS, Fairfield: TX0000752, issued June 23, 2015
MONTICELLO THERMO LIGNITE MINING AREA, Sulphur Springs: TX0071081, issued September 22, 2020
MARTIN LAKE AND OAK HILL LIGNITE MINING, Henderson: TX0091120, issued March 20, 2018
THREE OAKS MINE WWTP, Elgin: TX0124311, issued October 30, 2019
MARTIN LAKEOAK HILL LIBERTY LIGNITE MINING AREAS, Beckville: TX0149250

MONTICELLO LIGNITE MINING AREA among its neighbors

EPA’s permit file holds 6 discharge permits in the Rays Creek-South Sulphur River subwatershed (HUC 111403010104), TX0068357 among them. Its county holds 32, 3 of them major permits; TX0068357 is a minor permit.

Other permits in the Rays Creek-South Sulphur River subwatershed (HUC 111403010104)

EAST TEXAS A&M EVENT CENTERARENA, Commerce: TXR1576TV, minor permit, discharging to UPPER SOUTH SULPHUR RIVER, permit term to March 4, 2028
SOUTH SULPHUR WWTP, Southlake: TX0149373, not classed
TEXAS A&M UNIV COMMERCE - NATL LAB FOR GAMEBIRD RESEARCH, Campbell: TXR1593RH, minor permit, discharging to UPPER SOUTH SULPHUR RIVER, permit term to March 4, 2028
TEXAS A&M UNIVERSITY COMMERCE - AGRICULTURAL MULTIPURPOSE ED, Campbell: TXR1594RH, minor permit, discharging to UPPER SOUTH SULPHUR RIVER, permit term to March 4, 2028
TXDOT - PAR - CSJ 0768-01-057, Commerce: TXR1567NN, minor permit, discharging to SOUTH SULFUR RIVER TRIBUTARY, permit term to March 4, 2028

Identity

Facility as filed	MONTICELLO LIGNITE MINING AREA
Permittee as filed	LUMINANT MINING COMPANY LLC
NPDES ID	TX0068357
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
Issued	May 13, 2019
Expiration date	May 13, 2024
Address	Mount Pleasant, TX 75456
Receiving water	CYPRESS CREEK RIVER SEG. NO. 0408
Subwatershed	Rays Creek-South Sulphur River (HUC 111403010104)

Effluent limits and exceedances

11Pollutants on file
11Under a numeric limit
9With a violation of any kind
2With 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
Iron, total [as Fe]	26	36	2	July 31, 2004	40% over the limit
Selenium, total [as Se]	13	24	1	October 31, 2009	11% over the limit
Flow, in conduit or thru treatment plant	72	59	0
Solids, total suspended	30	46	0
pH	72	44	0
BOD, 5-day, 20 deg. C	4	12	0
Solids, settleable	21	11	0
Chlorine, total residual	2	7	0
Aluminum, total [as Al]	13	3	0
E. coli	4	0	0
Oil & Grease	2	0	0

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES TX0068357.

Inspections

Date	What EPA recorded	Agency
May 4, 2026	Follow-Up	S
March 19, 2026	Follow-Up	S

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 TX0068357.

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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 TX0068357 for the Monticello Lignite Mining Area in Mount Pleasant, TX, held by Luminant Mining Company LLC and discharging to Cypress Creek River Seg. No. 0408. The permit status is listed as administratively continued, with 11 pollutants on file, 11 of them under a numeric limit, and 2 pollutants with an effluent exceedance.