Clean Water Act discharge permit · NPDES MAG640066

DOPPING BROOK WTP, Holliston, MA: NPDES MAG640066 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
5Pollutants under a numeric limit
3Pollutants with an effluent exceedance

DOPPING BROOK WTP, held by HOLLISTON WATER DEPT. DOPPING BROOK WTP, holds NPDES permit MAG640066, which discharges to Bogastow Brook. EPA’s file records it issued August 1, 2012 and expiring September 30, 2014. 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	DOPPING BROOK WTP
Permittee as filed	HOLLISTON WATER DEPT. DOPPING BROOK WTP
NPDES ID	MAG640066
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	August 1, 2012
Expiration date	September 30, 2014
Address	Holliston, MA 01746
Receiving water	BOGASTOW BROOK

Cited to the EPA ICIS-NPDES permit file (ECHO download).

Effluent limits and exceedances

20Pollutants on file
5Under a numeric limit
20With a violation of any kind
3With 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
Chlorine, total residual	2	288	101	June 30, 2023	9,795% over the limit
Flow, in conduit or thru treatment plant	2	174	4	June 30, 2023	13% over the limit
pH	2	206	2	July 31, 2018
Solids, total suspended	2	170	0
Aluminum, total recoverable	1	162	0
Phosphorus, total [as P]	0	50	0
Alkalinity, total [as CaCO3]	0	34	0
Nitrogen, ammonia total [as N]	0	34	0
Carbon, tot organic [TOC]	0	34	0
Hardness, total [as CaCO3]	0	34	0
Nickel, total recoverable	0	34	0
Zinc, total recoverable	0	34	0
Cadmium, total recoverable	0	34	0
Lead, total recoverable	0	34	0
Copper, total recoverable	0	34	0
Specific Conductance	0	34	0
Solids, total	0	17	0
Solids, total dissolved	0	17	0
LC50 Static 48Hr Acute Ceriodaphnia dubia	0	17	0
NOEL Static Renewal 7Day Chronic Ceriodaphnia dubia	0	17	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 MAG640066.

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

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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 MAG640066 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

This public-records page covers Clean Water Act discharge permit NPDES MAG640066 for DOPPING BROOK WTP, held by HOLLISTON WATER DEPT., which discharges to BOGASTOW BROOK and is administratively continued. The page lists 20 pollutants on file, 5 under a numeric limit, 20 with a violation of any kind, and 3 with an effluent exceedance.