THE CONFLUENCE
NPDES ID: CO0049003
S — SNC: Compliance schedule violation
The facility missed a deadline in its compliance schedule by more than 90 days.
This quarter: 4 single-event violations.
Violations
December 31, 2025
Propylene oxide
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
Hydrazine
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
Perchlorate [ClO4]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
Di[2-ethylhexyl] adipate
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
1,1,1-Trifluoroethane
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
Benzyl chloride
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
Oil and grease
110% over limit
Discharged 21 mg/L against a permitted limit of 10 mg/L (INST MAX)
DMR, Limited - Numeric Violation
Epichlorohydrin
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
November 30, 2025
Oil and grease
450% over limit
Discharged 55 mg/L against a permitted limit of 10 mg/L (INST MAX)
DMR, Limited - Numeric Violation
June 30, 2025
1,1,1-Trifluoroethane
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
May 31, 2025
Manganese, dissolved [as Mn]
0% over limit
Discharged 0.0008 mg/L against a permitted limit of 0.19000001 mg/L (30DA AVG)
DMR, Limited - Overdue
Zinc, potentially dissolved
0% over limit
Discharged 0.004 mg/L against a permitted limit of 0.39400002 mg/L (30DA AVG)
DMR, Limited - Overdue
Sulfate
0% over limit
Discharged 100 mg/L against a permitted limit of 269 mg/L (30DA AVG)
DMR, Limited - Overdue
pH
0% over limit
Discharged 7.55 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.014 MGD against a permitted limit of 0.068 MGD (30DA AVG)
DMR, Limited - Overdue
Iron, dissolved [as Fe]
0% over limit
Discharged 0.005 mg/L against a permitted limit of 0.36500002 mg/L (30DA AVG)
DMR, Limited - Overdue
pH
0% over limit
Discharged 6.73 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Overdue
Iron, total recoverable
0% over limit
Discharged 0.005 mg/L against a permitted limit of 1.15000005 mg/L (30DA AVG)
DMR, Limited - Overdue
Aluminum, total recoverable
0% over limit
Discharged 0.001 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Aluminum, total recoverable
0% over limit
Discharged 0.001 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
Zinc, potentially dissolved
0% over limit
Discharged 0.004 mg/L against a permitted limit of 0.48800002 mg/L (DAILY MX)
DMR, Limited - Overdue
Lead, total recoverable
0% over limit
Discharged 0.0001 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Nitrogen, inorganic total
0% over limit
Discharged 0.18 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Overdue
Selenium, potentially dissolvd
0% over limit
Discharged 0.0008 mg/L against a permitted limit of 0.021 mg/L (DAILY MX)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0.03 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Arsenic, total recoverable
0% over limit
Discharged 0 mg/L against a permitted limit of 0.003 mg/L (30DA AVG)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 5 mg/L against a permitted limit of 45 mg/L (MX 7D AV)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 5 mg/L against a permitted limit of 30 mg/L (30DA AVG)
DMR, Limited - Overdue
Chloride [as Cl]
0% over limit
Discharged 152 mg/L against a permitted limit of 285 mg/L (30DA AVG)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.016 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0.03 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
Oil and grease
80% over limit
Discharged 18 mg/L against a permitted limit of 10 mg/L (INST MAX)
DMR, Limited - Overdue
Oil and grease
80% over limit
Discharged 18 mg/L against a permitted limit of 10 mg/L (INST MAX)
DMR, Limited - Numeric Violation
Manganese, dissolved [as Mn]
0% over limit
Discharged 0.0008 mg/L against a permitted limit of 4.98800024 mg/L (DAILY MX)
DMR, Limited - Overdue
Selenium, potentially dissolvd
0% over limit
Discharged 0.0008 mg/L against a permitted limit of 0.0049 mg/L (30DA AVG)
DMR, Limited - Overdue
April 30, 2025
Solids, total suspended
0% over limit
Discharged 2.1 mg/L against a permitted limit of 45 mg/L (MX 7D AV)
DMR, Limited - Overdue
Chloride [as Cl]
0% over limit
Discharged 170 mg/L against a permitted limit of 285 mg/L (30DA AVG)
DMR, Limited - Overdue
Iron, dissolved [as Fe]
0% over limit
Discharged 0.007 mg/L against a permitted limit of 0.36500002 mg/L (30DA AVG)
DMR, Limited - Overdue
Lead, total recoverable
0% over limit
Discharged 0.0005 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Nitrogen, inorganic total
0% over limit
Discharged 0.21 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Overdue
Aluminum, total recoverable
0% over limit
Discharged 0.005 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
Zinc, potentially dissolved
0% over limit
Discharged 0.005 mg/L against a permitted limit of 0.39400002 mg/L (30DA AVG)
DMR, Limited - Overdue
Manganese, dissolved [as Mn]
0% over limit
Discharged 0.0015 mg/L against a permitted limit of 4.98800024 mg/L (DAILY MX)
DMR, Limited - Overdue
Selenium, potentially dissolvd
0% over limit
Discharged 0.0005 mg/L against a permitted limit of 0.021 mg/L (DAILY MX)
DMR, Limited - Overdue
Arsenic, total recoverable
0% over limit
Discharged 0.0002 mg/L against a permitted limit of 0.003 mg/L (30DA AVG)
DMR, Limited - Overdue
Iron, total recoverable
0% over limit
Discharged 0.007 mg/L against a permitted limit of 1.15000005 mg/L (30DA AVG)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0.11 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.013 MGD against a permitted limit of 0.068 MGD (30DA AVG)
DMR, Limited - Overdue
Zinc, potentially dissolved
0% over limit
Discharged 0.005 mg/L against a permitted limit of 0.48800002 mg/L (DAILY MX)
DMR, Limited - Overdue
Sulfate
0% over limit
Discharged 98 mg/L against a permitted limit of 269 mg/L (30DA AVG)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0.11 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
pH
0% over limit
Discharged 7 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Overdue
Oil and grease
0% over limit
Discharged 0 mg/L against a permitted limit of 10 mg/L (INST MAX)
DMR, Limited - Overdue
pH
0% over limit
Discharged 7.8 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.014 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 2.1 mg/L against a permitted limit of 30 mg/L (30DA AVG)
DMR, Limited - Overdue
Aluminum, total recoverable
0% over limit
Discharged 0.005 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Selenium, potentially dissolvd
0% over limit
Discharged 0.0005 mg/L against a permitted limit of 0.0049 mg/L (30DA AVG)
DMR, Limited - Overdue
Manganese, dissolved [as Mn]
0% over limit
Discharged 0.0015 mg/L against a permitted limit of 0.19000001 mg/L (30DA AVG)
DMR, Limited - Overdue
December 31, 2024
1,1,1-Trifluoroethane
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)