Clean Water Act discharge permit · NPDES MAG580020
ROYALSTON W W T P, South Royalston, MA: NPDES MAG580020 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 29Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
ROYALSTON W W T P holds NPDES permit MAG580020, which discharges to Millers River. EPA’s file records it issued September 28, 2021 and expiring November 30, 2026. 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 | ROYALSTON W W T P |
|---|---|
| Permittee as filed | ROYALSTON W W T P |
| NPDES ID | MAG580020 |
| Permit status | Effective |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | September 28, 2021 |
| Expiration date | November 30, 2026 |
| Address | South Royalston, MA 01368 |
| Receiving water | MILLERS RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Beaver Brook-Millers River (HUC 010802020204) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 29Pollutants on file
- 29Under a numeric limit
- 17With a violation of any kind
- 4With 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 |
|---|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | 6 | 16 | 4 | July 31, 2026 | 12% over the limit |
| Solids, total suspended | 6 | 14 | 2 | September 30, 2025 | 6% over the limit |
| pH | 3 | 5 | 1 | November 30, 2025 | |
| Chlorine, total residual | 2 | 5 | 1 | May 31, 2026 | 7% over the limit |
| Flow, in conduit or thru treatment plant | 3 | 6 | 0 | ||
| E. coli | 2 | 4 | 0 | ||
| Perfluorooctanoic acid (PFOA) | 3 | 3 | 0 | ||
| Perfluoroheptanoic acid (PFHpA) | 3 | 3 | 0 | ||
| Perfluorononanoic acid (PFNA) | 3 | 3 | 0 | ||
| Perfluorodecanoic acid (PFDA) | 3 | 3 | 0 | ||
| Perfluorohexanesulfonic acid (PFHxS) | 3 | 3 | 0 | ||
| Perfluorooctanesulfonic acid (PFOS) | 3 | 3 | 0 | ||
| Nitrogen, total [as N] | 2 | 2 | 0 | ||
| BOD, 5-day, percent removal | 1 | 2 | 0 | ||
| Solids, suspended percent removal | 1 | 2 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 1 | 0 | ||
| Nitrite + Nitrate total [as N] | 1 | 1 | 0 | ||
| Nitrogen, ammonia total [as N] | 2 | 0 | 0 | ||
| Carbon, tot organic [TOC] | 2 | 0 | 0 | ||
| Hardness, total [as CaCO3] | 2 | 0 | 0 | ||
| Cadmium, total [as Cd] | 2 | 0 | 0 | ||
| Copper, total [as Cu] | 2 | 0 | 0 | ||
| Lead, total [as Pb] | 2 | 0 | 0 | ||
| Nickel, total [as Ni] | 2 | 0 | 0 | ||
| Zinc, total [as Zn] | 2 | 0 | 0 | ||
| Aluminum, total [as Al] | 2 | 0 | 0 | ||
| Temperature, water deg. centigrade | 1 | 0 | 0 | ||
| Carbon, dissolved organic [as C] | 1 | 0 | 0 | ||
| LC50 Static 48Hr Acute Ceriodaphnia dubia | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES MAG580020.
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, MAG580020.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
How we handle your data → Privacy
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 MAG580020 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.