HOLLINGSWORTH & VOSE
NPDES ID: MA0004561
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
Violations
March 31, 2026
Zinc, total [as Zn]
114% over limit
Discharged 0.32470002 mg/L against a permitted limit of 0.15200001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2026
Zinc, total [as Zn]
195% over limit
Discharged 0.44820002 mg/L against a permitted limit of 0.15200001 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Zinc, total [as Zn]
928% over limit
Discharged 1.56300007 mg/L against a permitted limit of 0.15200001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2026
Zinc, total [as Zn]
2476% over limit
Discharged 3.91500019 mg/L against a permitted limit of 0.15200001 mg/L (MO AVG)
DMR, Limited - Overdue
Zinc, total [as Zn]
2476% over limit
Discharged 3.91500019 mg/L against a permitted limit of 0.15200001 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Zinc, total [as Zn]
10025% over limit
Discharged 15.39000073 mg/L against a permitted limit of 0.15200001 mg/L (DAILY MX)
DMR, Limited - Overdue
Zinc, total [as Zn]
10025% over limit
Discharged 15.39000073 mg/L against a permitted limit of 0.15200001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2025
Zinc, total [as Zn]
35% over limit
Discharged 0.20450001 mg/L against a permitted limit of 0.15200001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2025
Copper, total [as Cu]
42% over limit
Discharged 0.03032 mg/L against a permitted limit of 0.0214 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
3% over limit
Discharged 225.45639811 kg/d against a permitted limit of 217.91999817 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2024
pH
0% over limit
Discharged 5.9 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (5 days ago)