HUDSON MECHANICAL WWTF
NPDES ID: COG591104
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
This quarter: 6 effluent violations.
Violations
May 31, 2026
Nitrogen, ammonia total [as N]
210% over limit
Discharged 46.5 mg/L against a permitted limit of 15 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
1838% over limit
Discharged 46.5 mg/L against a permitted limit of 2.4 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
2% over limit
Discharged 46 mg/L against a permitted limit of 45 mg/L (MX 7D AV)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
9% over limit
Discharged 49 mg/L against a permitted limit of 45 mg/L (MX 7D AV)
DMR, Limited - Numeric Violation
April 30, 2026
Nitrogen, ammonia total [as N]
104% over limit
Discharged 28.6 mg/L against a permitted limit of 14 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
1405% over limit
Discharged 28.6 mg/L against a permitted limit of 1.9 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Nitrogen, ammonia total [as N]
816% over limit
Discharged 29.3 mg/L against a permitted limit of 3.2 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
95% over limit
Discharged 29.3 mg/L against a permitted limit of 15 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, ammonia total [as N]
238% over limit
Discharged 15.9 mg/L against a permitted limit of 4.7 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
71% over limit
Discharged 77 mg/L against a permitted limit of 45 mg/L (MX 7D AV)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
51% over limit
Discharged 68 mg/L against a permitted limit of 45 mg/L (MX 7D AV)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
30% over limit
Discharged 39 mg/L against a permitted limit of 30 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
November 30, 2025
BOD, 5-day, 20 deg. C
4% over limit
Discharged 47 mg/L against a permitted limit of 45 mg/L (MX 7D AV)
DMR, Limited - Numeric Violation
E. coli
Limit violation
Discharged 2420 MPN/100mL against a permitted limit of 1260 MPN/100mL (MX 7D GM)
DMR, Limited - Numeric Violation
October 31, 2025
Solids, suspended percent removal
13% over limit
Discharged 83 % against a permitted limit of 85 % (MINIMUM)
DMR, Limited - Numeric Violation
February 28, 2025
Sulfate
60% over limit
Discharged 399 mg/L against a permitted limit of 250 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
January 31, 2025
Sulfate
26% over limit
Discharged 314.67 mg/L against a permitted limit of 250 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Sulfate
63% over limit
Discharged 407 mg/L against a permitted limit of 250 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)