Clean Water Act discharge permit · NPDES PAG030291
MAC HYDRAULICS 4901 CHESTER CREEK FACILITY, Brookhaven, PA: NPDES PAG030291 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 9Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
MAC HYDRAULICS 4901 CHESTER CREEK FACILITY, held by MAC MACHINE LLC DBA MAC HYDRAULICS, holds NPDES permit PAG030291, which discharges to Chester Creek. EPA’s file records it issued July 26, 2023 and expiring March 23, 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 | MAC HYDRAULICS 4901 CHESTER CREEK FACILITY |
|---|---|
| Permittee as filed | MAC MACHINE LLC DBA MAC HYDRAULICS |
| NPDES ID | PAG030291 |
| Permit status | Effective |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | July 26, 2023 |
| Expiration date | March 23, 2028 |
| Issuing agency | State Environmental Organization |
| Address | Brookhaven, PA 19015 |
| Receiving water | Chester Creek |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Chester Creek (HUC 020402020605) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 9Pollutants on file
- 9Under a numeric limit
- 9With 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 |
|---|---|---|---|---|---|
| Oil & Grease | 1 | 4 | 0 | ||
| Nitrogen, total [as N] | 1 | 4 | 0 | ||
| Nitrite + Nitrate total [as N] | 1 | 4 | 0 | ||
| pH | 1 | 1 | 0 | ||
| Solids, total suspended | 1 | 1 | 0 | ||
| Phosphorus, total [as P] | 1 | 1 | 0 | ||
| Iron, total [as Fe] | 1 | 1 | 0 | ||
| Zinc, total [as Zn] | 1 | 1 | 0 | ||
| Aluminum, total [as Al] | 1 | 1 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES PAG030291.
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 PAG030291.
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, PAG030291.
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 PAG030291 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.