Clean Water Act discharge permit · NPDES TX0142522
CITY OF MOUNT CALM, Mount Calm, TX: NPDES TX0142522 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 7Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
CITY OF MOUNT CALM, held by MOUNT CALM, CITY OF, holds NPDES permit TX0142522, which discharges to Lake Mexia. EPA’s file records it issued December 22, 2023 and expiring December 22, 2028. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | CITY OF MOUNT CALM |
|---|---|
| Permittee as filed | MOUNT CALM, CITY OF |
| NPDES ID | TX0142522 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | December 22, 2023 |
| Expiration date | December 22, 2028 |
| Address | Mount Calm, TX 76673 |
| Receiving water | Lake Mexia |
| Subwatershed | Grays Branch-Navasota River (HUC 120701030101) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 7Pollutants on file
- 7Under a numeric limit
- 7With 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 |
|---|---|---|---|---|---|
| E. coli | 2 | 15 | 1 | May 31, 2025 | 398% over the limit |
| BOD, 5-day, 20 deg. C | 3 | 21 | 0 | ||
| pH | 2 | 14 | 0 | ||
| Solids, total suspended | 2 | 14 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 14 | 0 | ||
| Chlorine, total residual | 2 | 14 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 7 | 0 |
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
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| October 15, 2024 | Permit Violations - Violation Specified in Comment | ST6 |
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
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, TX0142522.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
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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 TX0142522 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.