Clean Water Act discharge permit · NPDES TX0085821
MAPLE LEAF GARDENS WWTP, Highlands, TX: NPDES TX0085821 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 38Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
MAPLE LEAF GARDENS WWTP, held by NERRO SUPPLY LLC, holds NPDES permit TX0085821, which discharges to Unnamed Drainage Ditch,Rolling Fork,Whiteoak Bayou. EPA’s file records it issued October 17, 2017 and expiring March 1, 2022. 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 | MAPLE LEAF GARDENS WWTP |
|---|---|
| Permittee as filed | NERRO SUPPLY LLC |
| NPDES ID | TX0085821 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | October 17, 2017 |
| Expiration date | March 1, 2022 |
| Address | Highlands, TX 77064 |
| Receiving water | UNNAMED DRAINAGE DITCH,ROLLING FORK,WHITEOAK BAYOU |
| Subwatershed | Cole Creek-Whiteoak Bayou (HUC 120401040302) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 38Pollutants on file
- 38Under a numeric limit
- 37With a violation of any kind
- 7With 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 | 141 | 42 | June 30, 2026 | 680% over the limit |
| Solids, total suspended | 3 | 132 | 33 | June 30, 2026 | 407% over the limit |
| Flow, in conduit or thru treatment plant | 2 | 92 | 26 | March 31, 2022 | 316% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 3 | 107 | 8 | June 30, 2026 | 430% over the limit |
| Oxygen, dissolved [DO] | 1 | 36 | 3 | May 31, 2026 | 25% over the limit |
| Chlorine, total residual | 2 | 67 | 1 | October 31, 2025 | 7% over the limit |
| E. coli | 2 | 21 | 1 | January 31, 2018 | 1,110% over the limit |
| pH | 3 | 72 | 0 | ||
| Arsenic, dry weight | 5 | 20 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 5 | 20 | 0 | ||
| Selenium, dry weight | 3 | 12 | 0 | ||
| Copper, dry weight | 3 | 12 | 0 | ||
| Cadmium, dry weight | 3 | 12 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 12 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 12 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 12 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 3 | 12 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 12 | 0 | ||
| Nickel, total [as Ni] | 2 | 8 | 0 | ||
| Level of pathogen requirements achieved | 2 | 8 | 0 | ||
| Description of pathogen option used | 2 | 8 | 0 | ||
| Vector attraction reduction alternative used | 2 | 8 | 0 | ||
| Ann. amt sludge disposed by other method | 1 | 5 | 0 | ||
| Annual amt of sludge incinerated | 1 | 5 | 0 | ||
| Annual sludge production, total | 1 | 5 | 0 | ||
| Annual amount of sludge land applied | 1 | 5 | 0 | ||
| Annual amt. sludge disposed surface unit | 1 | 5 | 0 | ||
| Annual amt sludge disposed in landfill | 1 | 5 | 0 | ||
| Annual amt sludge transported interstate | 1 | 5 | 0 | ||
| Fecal coliform | 1 | 4 | 0 | ||
| Polychlorinated biphenyls [PCBs] | 1 | 4 | 0 | ||
| Toxicity characteristic leaching procedure | 1 | 4 | 0 | ||
| Unit w/liner/leachate collection system | 1 | 4 | 0 | ||
| Boundary areas | 1 | 4 | 0 | ||
| Salmonella | 1 | 4 | 0 | ||
| Pollutant table from 503.13 | 1 | 4 | 0 | ||
| Compliance w/part 258 sludge requirement | 1 | 3 | 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
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| May 31, 2022 | 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 15, 2026.