Clean Water Act discharge permit · NPDES TX0123552
ROCKY POINT ESTATES MHP WWTP, Flower Mound, TX: NPDES TX0123552 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 38Pollutants under a numeric limit
- 10Pollutants with an effluent exceedance
ROCKY POINT ESTATES MHP WWTP, held by STONETOWN ROCKY POINT LLC, holds NPDES permit TX0123552, which discharges to E Fork Sharps Branch;Sharps Branch;Grapevine Lake. EPA’s file records it issued November 26, 2018 and expiring November 26, 2023. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | ROCKY POINT ESTATES MHP WWTP |
|---|---|
| Permittee as filed | STONETOWN ROCKY POINT LLC |
| NPDES ID | TX0123552 |
| 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 | November 26, 2018 |
| Expiration date | November 26, 2023 |
| Address | Flower Mound, TX 75022 |
| Receiving water | E FORK SHARPS BRANCH;SHARPS BRANCH;GRAPEVINE LAKE |
| Subwatershed | Marshall Branch-Grapevine Lake (HUC 120301040305) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 40Pollutants on file
- 38Under a numeric limit
- 39With a violation of any kind
- 10With 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 |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 3 | 222 | 126 | February 28, 2026 | 1,991% over the limit |
| Solids, total suspended | 3 | 149 | 74 | December 31, 2023 | 1,012% over the limit |
| Oxygen, dissolved [DO] | 1 | 48 | 22 | August 31, 2009 | 75% over the limit |
| BOD, 5-day, 20 deg. C | 0 | 39 | 21 | September 30, 2003 | 672% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 3 | 100 | 18 | March 31, 2023 | 153% over the limit |
| E. coli | 2 | 23 | 17 | June 30, 2023 | 514% over the limit |
| Flow, in conduit or thru treatment plant | 2 | 71 | 16 | November 30, 2012 | 122% over the limit |
| Coliform, fecal general | 0 | 93 | 13 | July 31, 2009 | 99,999% over the limit |
| Chlorine, total residual | 2 | 72 | 8 | April 30, 2013 | 800% over the limit |
| pH | 3 | 63 | 1 | November 30, 2007 | |
| Arsenic, dry weight | 5 | 10 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 5 | 10 | 0 | ||
| Selenium, dry weight | 3 | 6 | 0 | ||
| Copper, dry weight | 3 | 6 | 0 | ||
| Cadmium, dry weight | 3 | 6 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 6 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 6 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 6 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 3 | 6 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 6 | 0 | ||
| Polychlorinated biphenyls [PCBs] | 1 | 5 | 0 | ||
| Toxicity characteristic leaching procedure | 1 | 5 | 0 | ||
| Nickel, total [as Ni] | 2 | 4 | 0 | ||
| Level of pathogen requirements achieved | 2 | 4 | 0 | ||
| Description of pathogen option used | 2 | 4 | 0 | ||
| Vector attraction reduction alternative used | 2 | 4 | 0 | ||
| Ann. amt sludge disposed by other method | 1 | 4 | 0 | ||
| Annual amt of sludge incinerated | 1 | 4 | 0 | ||
| Annual sludge production, total | 1 | 4 | 0 | ||
| Annual amount of sludge land applied | 1 | 4 | 0 | ||
| Annual amt. sludge disposed surface unit | 1 | 4 | 0 | ||
| Annual amt sludge disposed in landfill | 1 | 4 | 0 | ||
| Annual amt sludge transported interstate | 1 | 4 | 0 | ||
| Fecal coliform | 1 | 2 | 0 | ||
| Unit w/liner/leachate collection system | 1 | 2 | 0 | ||
| Compliance w/part 258 sludge requirement | 1 | 2 | 0 | ||
| Boundary areas | 1 | 2 | 0 | ||
| Salmonella | 1 | 2 | 0 | ||
| Pollutant table from 503.13 | 1 | 2 | 0 | ||
| Annual whole sludge application rate | 1 | 0 | 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
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| February 10, 2026 | Permit Violations - Violation Specified in Comment | ST6 |
| April 23, 2020 | 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.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.