Clean Water Act discharge permit · NPDES MD0066176
HO CO MAYFIELD MAIN. FACILITY, Elkridge, MD: NPDES MD0066176 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 9Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
HO CO MAYFIELD MAIN. FACILITY, held by HOWARD COUNTY BUREAU OF CENTRA, holds NPDES permit MD0066176, which discharges to Patapsco River. EPA’s file records it issued May 1, 2000 and expiring April 30, 2005. 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 | HO CO MAYFIELD MAIN. FACILITY |
|---|---|
| Permittee as filed | HOWARD COUNTY BUREAU OF CENTRA |
| NPDES ID | MD0066176 |
| 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 | May 1, 2000 |
| Expiration date | April 30, 2005 |
| Address | Elkridge, MD 21227 |
| Receiving water | PATAPSCO RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Deep Run-Patapsco River (HUC 020600031102) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 47Pollutants on file
- 9Under a numeric limit
- 47With 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 |
|---|---|---|---|---|---|
| 1,1-Dichloroethylene | 1 | 14 | 0 | ||
| Methylene chloride | 1 | 13 | 0 | ||
| Tetrachloroethene | 1 | 13 | 0 | ||
| Trichloroethene | 1 | 13 | 0 | ||
| pH | 2 | 4 | 0 | ||
| Copper, total [as Cu] | 2 | 4 | 0 | ||
| Zinc, total [as Zn] | 2 | 4 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 2 | 0 | ||
| Hardness, total [as CaCO3] | 0 | 2 | 0 | ||
| Copper, dissolved [as Cu] | 0 | 2 | 0 | ||
| Lead, dissolved [as Pb] | 0 | 2 | 0 | ||
| Lead, total [as Pb] | 0 | 2 | 0 | ||
| Nickel, dissolved [as Ni] | 0 | 2 | 0 | ||
| Nickel, total [as Ni] | 0 | 2 | 0 | ||
| Zinc, dissolved [as Zn] | 0 | 2 | 0 | ||
| Flow | 0 | 2 | 0 | ||
| Organics, total | 1 | 1 | 0 | ||
| Dichlorobromomethane | 0 | 1 | 0 | ||
| Carbon tetrachloride | 0 | 1 | 0 | ||
| Bromoform | 0 | 1 | 0 | ||
| Dibromochloromethane | 0 | 1 | 0 | ||
| Chloroform | 0 | 1 | 0 | ||
| Toluene | 0 | 1 | 0 | ||
| Benzene | 0 | 1 | 0 | ||
| Chlorobenzene | 0 | 1 | 0 | ||
| Chloroethane, total weight | 0 | 1 | 0 | ||
| Ethylbenzene | 0 | 1 | 0 | ||
| Methyl bromide [Bromomethane] | 0 | 1 | 0 | ||
| Methyl chloride [Chloromethane] | 0 | 1 | 0 | ||
| Tetrachloroethylene | 0 | 1 | 0 | ||
| Trichlorofluoromethane | 0 | 1 | 0 | ||
| 1,1-Dichloroethane | 0 | 1 | 0 | ||
| 1,1,1-Trichloroethane | 0 | 1 | 0 | ||
| 1,1,2-Trichloroethane | 0 | 1 | 0 | ||
| 1,1,2,2-Tetrachloroethane | 0 | 1 | 0 | ||
| 1,2-Dichloroethane, total weight | 0 | 1 | 0 | ||
| 1,2-Dichlorobenzene | 0 | 1 | 0 | ||
| 1,2-Dichloropropane | 0 | 1 | 0 | ||
| 1,3-Dichlorobenzene | 0 | 1 | 0 | ||
| 1,4-Dichlorobenzene | 0 | 1 | 0 | ||
| 2-Chloroethyl vinyl ether, [mixed] | 0 | 1 | 0 | ||
| 1,2-Dichloroethene | 0 | 1 | 0 | ||
| Vinyl chloride | 0 | 1 | 0 | ||
| Trichloroethylene | 0 | 1 | 0 | ||
| Volatile Organic Compound [VOC] | 0 | 1 | 0 | ||
| 1,3-Dichloropropene | 0 | 1 | 0 | ||
| Dichloroethane | 0 | 1 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MD0066176.
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 MD0066176.
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.