NPDES TX0117986 · Clean Water Act

CHULA VISTA WWTP, Crystal City, TX: NPDES TX0117986 discharge permit, effluent exceedances, inspections, penalties

CHULA VISTA WWTP, Crystal City, Texas: Individual permit TX0117986, held by ZAVALA COUNTY; Publicly owned treatment works; Administratively continued; issued May 14, 2020, term to May 14, 2025; discharges to TURKEY CRK;ESPANTOSA LK;SOLDIER SLOUGH;SOLDIER LK.

1 of the 38 pollutants listed for NPDES TX0117986 have no violation or effluent exceedance.

Nitrogen, ammonia total [as N]: 3 limits, 48 violations of any kind, 24 effluent exceedances, latest September 30, 2025, largest 2,069% over the limit.
E. coli: 2 limits, 24 violations of any kind, 5 effluent exceedances, latest November 30, 2019, largest 1,124% over the limit.
Solids, total suspended: 3 limits, 29 violations of any kind, 4 effluent exceedances, latest May 31, 2017, largest 60% over the limit.
Flow, in conduit or thru treatment plant: 2 limits, 20 violations of any kind, 2 effluent exceedances, latest June 30, 2014, largest 440% over the limit.
BOD, carbonaceous [5 day, 20 C]: 3 limits, 28 violations of any kind, 1 effluent exceedance, latest March 31, 2003, largest 31% over the limit.
pH: 3 limits, 18 violations of any kind, 1 effluent exceedance, latest June 30, 2019.
Chlorine, total residual: 2 limits, 21 violations of any kind.
Oxygen, dissolved [DO]: 1 limit, 8 violations of any kind.
Arsenic, dry weight: 5 limits, 5 violations of any kind.
Chromium, sludge, total, dry weight [as Cr]: 5 limits, 5 violations of any kind.
Selenium, dry weight: 3 limits, 3 violations of any kind.
Copper, dry weight: 3 limits, 3 violations of any kind.
Cadmium, dry weight: 3 limits, 3 violations of any kind.
Molybdenum, sludge, total, dry weight [as Mo]: 3 limits, 3 violations of any kind.
Zinc, sludge, total, dry weight [as Zn]: 3 limits, 3 violations of any kind.
Lead, sludge, total, dry weight [as Pb]: 3 limits, 3 violations of any kind.
Nickel, sludge, total, dry weight [as Ni]: 3 limits, 3 violations of any kind.
Mercury, sludge, total, dry weight [as Hg]: 3 limits, 3 violations of any kind.
Nickel, total [as Ni]: 2 limits, 2 violations of any kind.
Level of pathogen requirements achieved: 2 limits, 2 violations of any kind.
Description of pathogen option used: 2 limits, 2 violations of any kind.
Vector attraction reduction alternative used: 2 limits, 2 violations of any kind.
Polychlorinated biphenyls [PCBs]: 1 limit, 2 violations of any kind.
Toxicity characteristic leaching procedure: 1 limit, 2 violations of any kind.
Ann. amt sludge disposed by other method: 1 limit, 2 violations of any kind.
Annual amt of sludge incinerated: 1 limit, 2 violations of any kind.
Annual sludge production, total: 1 limit, 2 violations of any kind.
Annual amount of sludge land applied: 1 limit, 2 violations of any kind.
Annual amt. sludge disposed surface unit: 1 limit, 2 violations of any kind.
Annual amt sludge disposed in landfill: 1 limit, 2 violations of any kind.
Annual amt sludge transported interstate: 1 limit, 2 violations of any kind.
Compliance w/part 258 sludge requirement: 1 limit, 2 violations of any kind.
Fecal coliform: 1 limit, 1 violation of any kind.
Unit w/liner/leachate collection system: 1 limit, 1 violation of any kind.
Boundary areas: 1 limit, 1 violation of any kind.
Salmonella: 1 limit, 1 violation of any kind.
Pollutant table from 503.13: 1 limit, 1 violation of any kind.
Annual whole sludge application rate: 1 limit.

January 21, 2026: Under Review (State).
December 20, 2023: Permit Violations - Violation Specified in Comment (ST6).

Texas holds 1,720 Publicly owned treatment works coverages of this permit type in EPA’s file; 1,374 were issued before TX0117986.

Coverages issued nearest TX0117986

2020-05-08: CITY OF RICHMOND SWTP, Richmond: TX0137600, held by RICHMOND, CITY OF
2020-05-14: PALACIOS WWTP, Palacios: TX0023051, held by PALACIOS, CITY OF
2020-05-14: CITY OF CARRIZO SPRINGS WWTP, Carrizo Springs: TX0025976, held by CARRIZO SPRINGS, CITY OF
2020-05-14: CITY OF FLORESVILLE WWTP, Floresville: TX0056227, held by FLORESVILLE, CITY OF
2020-05-14: BRUSHY CREEK REGIONAL EAST WWTP, Round Rock: TX0101940, held by ROUND ROCK CITY OF
2020-05-14: RIDDLEVILLE STREET WWTP, Karnes City: TX0129984, held by KARNES CITY, CITY OF
2020-05-14: CITY OF GEORGE WEST WWTP, George West: TX0132799, held by GEORGE WEST, CITY OF
2020-05-15: FOSTER BRISCOE SCHOOL WWTP, Richmond: TX0139602, held by LAMAR CONSOLIDATED ISD
2020-05-22: MEDINA COUNTY WCID 2 WWTF, Medina County: TX0075779, held by MEDINA COUNTY WCID NO. 2
2020-05-26: SOUTHEAST WWTP, Houston: TX0035009, held by HOUSTON, CITY OF

CHULA VISTA WWTP among its neighbors

3 discharge permits are in the Pena Creek-Turkey Creek subwatershed (HUC 121101040605); TX0117986 is one. Its county: 9, 1 major; TX0117986 is minor permit.

Other permits in the Pena Creek-Turkey Creek subwatershed (HUC 121101040605)

CITY OF CRYSTAL CITY WWTP, Crystal City: TX0053392, major, term to 2023-07-20
TORRES READY MIX, Crystal City: TXR05CW73, minor, term to 2026-08-13

Identity

Facility	CHULA VISTA WWTP
Permittee	ZAVALA COUNTY
NPDES ID	TX0117986
Status	Administratively continued
Type	Individual permit
Class	Minor
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	May 14, 2020
Expires	May 14, 2025
Address	Crystal City, TX 78839
Receiving water	TURKEY CRK;ESPANTOSA LK;SOLDIER SLOUGH;SOLDIER LK
Subwatershed	Pena Creek-Turkey Creek (HUC 121101040605)
SIC	4952 – Sewerage Systems

NPDES TX0117986: effluent limits and exceedances

CHULA VISTA WWTP (NPDES TX0117986): 38 pollutants on file, 38 limited; 37 with a violation of any kind, 6 with an exceedance.

How exceedances are counted.

Pollutant	Limits	Violations	Exceedances	Latest	Largest, as filed
Nitrogen, ammonia total [as N]	3	48	24	September 30, 2025	2,069% over the limit
E. coli	2	24	5	November 30, 2019	1,124% over the limit
Solids, total suspended	3	29	4	May 31, 2017	60% over the limit
Flow, in conduit or thru treatment plant	2	20	2	June 30, 2014	440% over the limit
BOD, carbonaceous [5 day, 20 C]	3	28	1	March 31, 2003	31% over the limit
pH	3	18	1	June 30, 2019
Chlorine, total residual	2	21	0
Oxygen, dissolved [DO]	1	8	0
Arsenic, dry weight	5	5	0
Chromium, sludge, total, dry weight [as Cr]	5	5	0
Selenium, dry weight	3	3	0
Copper, dry weight	3	3	0
Cadmium, dry weight	3	3	0
Molybdenum, sludge, total, dry weight [as Mo]	3	3	0
Zinc, sludge, total, dry weight [as Zn]	3	3	0
Lead, sludge, total, dry weight [as Pb]	3	3	0
Nickel, sludge, total, dry weight [as Ni]	3	3	0
Mercury, sludge, total, dry weight [as Hg]	3	3	0
Nickel, total [as Ni]	2	2	0
Level of pathogen requirements achieved	2	2	0
Description of pathogen option used	2	2	0
Vector attraction reduction alternative used	2	2	0
Polychlorinated biphenyls [PCBs]	1	2	0
Toxicity characteristic leaching procedure	1	2	0
Ann. amt sludge disposed by other method	1	2	0
Annual amt of sludge incinerated	1	2	0
Annual sludge production, total	1	2	0
Annual amount of sludge land applied	1	2	0
Annual amt. sludge disposed surface unit	1	2	0
Annual amt sludge disposed in landfill	1	2	0
Annual amt sludge transported interstate	1	2	0
Compliance w/part 258 sludge requirement	1	2	0
Fecal coliform	1	1	0
Unit w/liner/leachate collection system	1	1	0
Boundary areas	1	1	0
Salmonella	1	1	0
Pollutant table from 503.13	1	1	0
Annual whole sludge application rate	1	0	0

NPDES TX0117986: inspections, violations and enforcement

NPDES TX0117986: 1 single-event violation

Date	What EPA recorded	Agency
December 20, 2023	Permit Violations - Violation Specified in Comment	ST6

NPDES TX0117986: 1 informal enforcement action

Date	What EPA recorded	Agency
January 21, 2026	Under Review	State

NPDES TX0117986 (CHULA VISTA WWTP): no inspection and formal enforcement action on file.

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Permits near NPDES TX0117986

NPDES TX0117986: 38 pollutant rows, 2 dated events; ICIS-NPDES download, loaded October 14, 2026.