Clean Water Act discharge permit · NPDES TX0137871
MONTGOMERY COUNTY MUD 100 WWTP, Willis, TX: NPDES TX0137871 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 8Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
MONTGOMERY COUNTY MUD 100 WWTP, held by CALVARY UTILITY COMPANY LLC, holds NPDES permit TX0137871, which discharges to Unnamed Trib; Chambers Crk; Weirs Crk; Lk Conroe. EPA’s file records it issued August 30, 2019 and expiring August 30, 2024. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | MONTGOMERY COUNTY MUD 100 WWTP |
|---|---|
| Permittee as filed | CALVARY UTILITY COMPANY LLC |
| NPDES ID | TX0137871 |
| 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 | August 30, 2019 |
| Expiration date | August 30, 2024 |
| Address | Willis, TX 77318 |
| Receiving water | UNNAMED TRIB; CHAMBERS CRK; WEIRS CRK; LK CONROE |
| Subwatershed | Hostetter Creek-Conroe Lake (HUC 120401010204) |
| SIC | 4952 – Sewerage Systems |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 8Pollutants on file
- 8Under a numeric limit
- 8With a violation of any kind
- 0With 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 | 9 | 0 | ||
| Nitrogen, ammonia total [as N] | 3 | 9 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 3 | 9 | 0 | ||
| pH | 2 | 6 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 6 | 0 | ||
| Chlorine, total residual | 2 | 6 | 0 | ||
| E. coli | 2 | 6 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 3 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES TX0137871.
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES TX0137871.
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
Watch this permit
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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID TX0137871 there.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.