L.S. STARRETT COMPANY
NPDES ID: MA0001350
D — SNC: Discharge monitoring report not received
The facility didn't submit its required discharge monitoring report.
Violations
February 28, 2026
pH
0% over limit
Discharged 6.1 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
January 31, 2026
pH
0% over limit
Discharged 8.35 SU against a permitted limit of 8.3 SU (MAXIMUM)
DMR, Limited - Numeric Violation
October 31, 2025
LC50 Static 48Hr Acute Ceriodaphnia dubia
80% over limit
Discharged 9.81 % against a permitted limit of 50 % (DAILY MN)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 8.4 SU against a permitted limit of 8.3 SU (MAXIMUM)
DMR, Limited - Numeric Violation
September 30, 2025
Temperature, water deg. fahrenheit
0% over limit
Discharged 0 deg F against a permitted limit of 83 deg F (DAILY MX)
DMR, Limited - Overdue
August 31, 2025
pH
0% over limit
Discharged 8.43 SU against a permitted limit of 8.3 SU (MAXIMUM)
DMR, Limited - Numeric Violation
July 31, 2025
pH
0% over limit
Discharged 8.7 SU against a permitted limit of 8.3 SU (MAXIMUM)
DMR, Limited - Numeric Violation
June 30, 2025
Perfluorohexanesulfonic acid (PFHxS)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Cadmium, total [as Cd]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.178 mg/L (DAILY MX)
DMR, Limited - Overdue
Silver, total [as Ag]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.082 mg/L (DAILY MX)
DMR, Limited - Overdue
Perfluoroheptanoic acid (PFHpA)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Lead, total [as Pb]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.69 mg/L (DAILY MX)
DMR, Limited - Overdue
Silver, total [as Ag]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.026 mg/L (MO AVG)
DMR, Limited - Overdue
Cadmium, total [as Cd]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.068 mg/L (MO AVG)
DMR, Limited - Overdue
Perfluorodecanoic acid (PFDA)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Perfluorooctanesulfonic acid (PFOS)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Lead, total [as Pb]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.119 mg/L (MO AVG)
DMR, Limited - Overdue
Organics, total toxic [TTO]
0% over limit
Discharged 0 mg/L against a permitted limit of 2.13 mg/L (DAILY MX)
DMR, Limited - Overdue
Perfluorononanoic acid (PFNA)
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
May 31, 2025
pH
0% over limit
Discharged 3.95 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 10.44 SU against a permitted limit of 8.3 SU (MAXIMUM)
DMR, Limited - Numeric Violation
April 30, 2025
pH
0% over limit
Discharged 6.43 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Overdue
pH
0% over limit
Discharged 6.43 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 10.24 SU against a permitted limit of 8.3 SU (MAXIMUM)
DMR, Limited - Overdue
pH
0% over limit
Discharged 10.24 SU against a permitted limit of 8.3 SU (MAXIMUM)
DMR, Limited - Numeric Violation
March 31, 2025
pH
0% over limit
Discharged 5.1 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 9.6 SU against a permitted limit of 8.3 SU (MAXIMUM)
DMR, Limited - Numeric Violation
February 28, 2025
pH
0% over limit
Discharged 5.3 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 9.1 SU against a permitted limit of 8.3 SU (MAXIMUM)
DMR, Limited - Numeric Violation
January 31, 2025
pH
0% over limit
Discharged 2.89 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
December 31, 2024
pH
0% over limit
Discharged 2.7 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 8.37 SU against a permitted limit of 8.3 SU (MAXIMUM)
DMR, Limited - Numeric Violation
November 30, 2024
pH
0% over limit
Discharged 8.37 SU against a permitted limit of 8.3 SU (MAXIMUM)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 8.5 SU against a permitted limit of 8.3 SU (MAXIMUM)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 3.3 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
October 31, 2024
LC50 Static 48Hr Acute Ceriodaphnia dubia
27% over limit
Discharged 36.4 % against a permitted limit of 50 % (DAILY MN)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 8.64 SU against a permitted limit of 8.3 SU (MAXIMUM)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 5.07 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 9.5 SU against a permitted limit of 8.3 SU (MAXIMUM)
DMR, Limited - Numeric Violation
September 30, 2024
Cadmium, total [as Cd]
0% over limit
Discharged 0.01 mg/L against a permitted limit of 0.178 mg/L (DAILY MX)
DMR, Limited - Overdue
Silver, total [as Ag]
0% over limit
Discharged 0.01 mg/L against a permitted limit of 0.026 mg/L (MO AVG)
DMR, Limited - Overdue
Lead, total [as Pb]
0% over limit
Discharged 0.01 mg/L against a permitted limit of 0.69 mg/L (DAILY MX)
DMR, Limited - Overdue
Trichloroethylene
0% over limit
Discharged 0.005 mg/L against a permitted limit of 0.005 mg/L (DAILY MX)
DMR, Limited - Overdue
Cadmium, total [as Cd]
0% over limit
Discharged 0.01 mg/L against a permitted limit of 0.068 mg/L (MO AVG)
DMR, Limited - Overdue
Lead, total [as Pb]
0% over limit
Discharged 0.01 mg/L against a permitted limit of 0.119 mg/L (MO AVG)
DMR, Limited - Overdue
Silver, total [as Ag]
0% over limit
Discharged 0.01 mg/L against a permitted limit of 0.082 mg/L (DAILY MX)
DMR, Limited - Overdue
Organics, total toxic [TTO]
0% over limit
Discharged 0.05 mg/L against a permitted limit of 2.13 mg/L (DAILY MX)
DMR, Limited - Overdue
August 31, 2024
pH
0% over limit
Discharged 8.5 SU against a permitted limit of 8.3 SU (MAXIMUM)
DMR, Limited - Numeric Violation
July 31, 2024
pH
0% over limit
Discharged 14 SU against a permitted limit of 8.3 SU (MAXIMUM)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 5 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
Chromium, hexavalent [as Cr]
50% over limit
Discharged 0.15 mg/L against a permitted limit of 0.1 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)