A27 CDP LIQUIDS LINE RELEASE REMEDIATION PROJECT
NPDES ID: COG318036
X — SNC: Effluent violation (non-monthly average limit)
The facility discharged more of a pollutant than its permit allows, measured over a period other than a monthly average.
This quarter: 6 effluent violations.
Violations
May 31, 2026
Arsenic, total recoverable
55% over limit
Discharged 0.00171 mg/L against a permitted limit of 0.0011 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Manganese, potentially dissolvd
81% over limit
Discharged 0.71300003 mg/L against a permitted limit of 0.39300002 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Iron, total recoverable
509% over limit
Discharged 0.91400004 mg/L against a permitted limit of 0.15000001 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Arsenic, total recoverable
55% over limit
Discharged 0.00171 mg/L against a permitted limit of 0.0011 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Manganese, potentially dissolvd
81% over limit
Discharged 0.71300003 mg/L against a permitted limit of 0.39300002 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Iron, total recoverable
509% over limit
Discharged 0.91400004 mg/L against a permitted limit of 0.15000001 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Iron, total recoverable
509% over limit
Discharged 0.91400004 mg/L against a permitted limit of 0.15000001 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Arsenic, total recoverable
55% over limit
Discharged 0.00171 mg/L against a permitted limit of 0.0011 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Manganese, potentially dissolvd
81% over limit
Discharged 0.71300003 mg/L against a permitted limit of 0.39300002 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Manganese, potentially dissolvd
81% over limit
Discharged 0.71300003 mg/L against a permitted limit of 0.39300002 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Iron, total recoverable
509% over limit
Discharged 0.91400004 mg/L against a permitted limit of 0.15000001 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Arsenic, total recoverable
55% over limit
Discharged 0.00171 mg/L against a permitted limit of 0.0011 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Solids, total dissolved
55% over limit
Discharged 618 mg/L against a permitted limit of 400 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Arsenic, total recoverable
55% over limit
Discharged 0.00171 mg/L against a permitted limit of 0.0011 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0.360001 MGD (DAILY MX)
DMR, Limited - Overdue
Flow, total
0% over limit
Discharged 0 gal against a permitted limit of 0 gal (MO TOTAL)
DMR, Monitor Only - Overdue
Manganese, dissolved [as Mn]
48% over limit
Discharged 0.0742 mg/L against a permitted limit of 0.05 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0.360001 MGD (30DA AVG)
DMR, Limited - Overdue
Iron, total recoverable
509% over limit
Discharged 0.91400004 mg/L against a permitted limit of 0.15000001 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Manganese, potentially dissolvd
81% over limit
Discharged 0.71300003 mg/L against a permitted limit of 0.39300002 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Manganese, potentially dissolvd
106% over limit
Discharged 0.81000004 mg/L against a permitted limit of 0.39300002 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Arsenic, total recoverable
101% over limit
Discharged 0.00221 mg/L against a permitted limit of 0.0011 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Iron, total recoverable
960% over limit
Discharged 1.59000008 mg/L against a permitted limit of 0.15000001 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Chromium, hexavalent dissolved [as Cr]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Chromium, hexavalent dissolved [as Cr]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
November 30, 2025
Arsenic, total recoverable
101% over limit
Discharged 0.00221 mg/L against a permitted limit of 0.0011 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Iron, total recoverable
960% over limit
Discharged 1.59000008 mg/L against a permitted limit of 0.15000001 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Manganese, potentially dissolvd
106% over limit
Discharged 0.81000004 mg/L against a permitted limit of 0.39300002 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Manganese, potentially dissolvd
106% over limit
Discharged 0.81000004 mg/L against a permitted limit of 0.39300002 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Iron, total recoverable
960% over limit
Discharged 1.59000008 mg/L against a permitted limit of 0.15000001 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Arsenic, total recoverable
101% over limit
Discharged 0.00221 mg/L against a permitted limit of 0.0011 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Iron, total recoverable
1300% over limit
Discharged 2.1000001 mg/L against a permitted limit of 0.15000001 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Arsenic, total recoverable
96% over limit
Discharged 0.00216 mg/L against a permitted limit of 0.0011 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Manganese, potentially dissolvd
189% over limit
Discharged 1.13500005 mg/L against a permitted limit of 0.39300002 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Manganese, potentially dissolvd
189% over limit
Discharged 1.13500005 mg/L against a permitted limit of 0.39300002 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Arsenic, total recoverable
96% over limit
Discharged 0.00216 mg/L against a permitted limit of 0.0011 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Manganese, dissolved [as Mn]
250% over limit
Discharged 0.17500001 mg/L against a permitted limit of 0.05 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Solids, total dissolved
67% over limit
Discharged 668 mg/L against a permitted limit of 400 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Iron, total recoverable
1300% over limit
Discharged 2.1000001 mg/L against a permitted limit of 0.15000001 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Iron, total recoverable
59% over limit
Discharged 1.59000008 mg/L against a permitted limit of 1.00000005 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Iron, total recoverable
1640% over limit
Discharged 2.61000012 mg/L against a permitted limit of 0.15000001 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Arsenic, total recoverable
92% over limit
Discharged 0.00211 mg/L against a permitted limit of 0.0011 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Manganese, potentially dissolvd
272% over limit
Discharged 1.46000007 mg/L against a permitted limit of 0.39300002 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
June 30, 2025
Arsenic, total recoverable
46% over limit
Discharged 0.00161 mg/L against a permitted limit of 0.0011 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Manganese, potentially dissolvd
163% over limit
Discharged 1.03250005 mg/L against a permitted limit of 0.39300002 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Iron, total recoverable
860% over limit
Discharged 1.44000007 mg/L against a permitted limit of 0.15000001 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
May 31, 2025
Arsenic, total recoverable
34% over limit
Discharged 0.00147 mg/L against a permitted limit of 0.0011 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Manganese, potentially dissolvd
152% over limit
Discharged 0.98870005 mg/L against a permitted limit of 0.39300002 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Iron, total recoverable
753% over limit
Discharged 1.27900006 mg/L against a permitted limit of 0.15000001 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Arsenic, total recoverable
61% over limit
Discharged 0.00177 mg/L against a permitted limit of 0.0011 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Manganese, potentially dissolvd
147% over limit
Discharged 0.97150005 mg/L against a permitted limit of 0.39300002 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Iron, total recoverable
1194% over limit
Discharged 1.94030009 mg/L against a permitted limit of 0.15000001 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Arsenic, total recoverable
66% over limit
Discharged 0.00183 mg/L against a permitted limit of 0.0011 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Iron, total recoverable
1280% over limit
Discharged 2.0700001 mg/L against a permitted limit of 0.15000001 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Manganese, potentially dissolvd
137% over limit
Discharged 0.93200004 mg/L against a permitted limit of 0.39300002 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
February 28, 2025
Iron, total recoverable
1193% over limit
Discharged 1.94000009 mg/L against a permitted limit of 0.15000001 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Arsenic, total recoverable
62% over limit
Discharged 0.00178 mg/L against a permitted limit of 0.0011 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Manganese, potentially dissolvd
145% over limit
Discharged 0.96300005 mg/L against a permitted limit of 0.39300002 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
January 31, 2025
Arsenic, total recoverable
61% over limit
Discharged 0.00177 mg/L against a permitted limit of 0.0011 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Iron, total recoverable
1127% over limit
Discharged 1.84000009 mg/L against a permitted limit of 0.15000001 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Manganese, potentially dissolvd
146% over limit
Discharged 0.96700005 mg/L against a permitted limit of 0.39300002 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Mercury, total [as Hg]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
Mercury, total [as Hg]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)