Clean Water Act discharge permit · NPDES MO0086525
CHAPEL HILL MHC WWTF, Hillsboro, MO: NPDES MO0086525 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 6Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
CHAPEL HILL MHC WWTF, held by Chapel Hill Court, Inc., holds NPDES permit MO0086525, which discharges to Tributary To Sandy Creek. EPA’s file records it issued February 27, 2017 and expiring December 31, 2021. 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 | CHAPEL HILL MHC WWTF |
|---|---|
| Permittee as filed | Chapel Hill Court, Inc. |
| NPDES ID | MO0086525 |
| 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 | February 27, 2017 |
| Expiration date | December 31, 2021 |
| Address | Hillsboro, MO 63050 |
| Receiving water | Tributary to Sandy Creek |
| Subwatershed | Sandy Creek (HUC 071401010803) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 6Pollutants on file
- 6Under a numeric limit
- 6With a violation of any kind
- 5With 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] | 4 | 53 | 45 | March 31, 2026 | 971% over the limit |
| Solids, total suspended | 2 | 18 | 10 | December 31, 2023 | 110% over the limit |
| E. coli | 8 | 24 | 8 | June 30, 2026 | 1,075% over the limit |
| BOD, 5-day, 20 deg. C | 2 | 16 | 8 | June 30, 2019 | 247% over the limit |
| pH | 1 | 5 | 1 | November 30, 2011 | |
| Flow, in conduit or thru treatment plant | 2 | 8 | 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
- 10Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| January 15, 2025 | Effluent Violations - Numeric effluent violation | ST6 |
| July 21, 2023 | Effluent Violations - Numeric effluent violation | ST6 |
| March 17, 2023 | Effluent Violations - Numeric effluent violation | ST6 |
| June 30, 2020 | Effluent Violations - Numeric effluent violation | ST6 |
| April 2, 2020 | Effluent Violations - Numeric effluent violation | ST6 |
| September 28, 2018 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| September 28, 2018 | Reporting Violations - Failure to Submit DMRs | ST6 |
| June 29, 2018 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| May 11, 2017 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| May 11, 2017 | Permit Violations - Failure to Submit Timely Permit Renewal Application | 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.