SHELL OFFSHORE, INC.
NPDES ID: GMG290103
S — SNC: Compliance schedule violation
The facility missed a deadline in its compliance schedule by more than 90 days.
This quarter: 8 effluent violations, 2 compliance schedule violations, 24 reporting violations.
Violations
June 30, 2026
Oil & grease, free oil
519% over limit
Discharged 260 mg/L against a permitted limit of 42 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Produced water, oil and grease
45% over limit
Discharged 42 mg/L against a permitted limit of 29 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Produced water, oil and grease
519% over limit
Discharged 260 mg/L against a permitted limit of 42 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Discharge drill cuttings, formation oil
0% over limit
Discharged 1 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (VALUE)
DMR, Limited - Numeric Violation
May 31, 2026
Whole Effluent Toxicity [WET] - M. beryllina
Limit violation
Discharged 1 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (VALUE)
DMR, Limited - Numeric Violation
Deck drainage, free oil
Limit violation
Discharged 2 d against a permitted limit of 0 d (MO TOTAL)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (5 months ago)
Last confirmed
September 15, 2026 (5 days ago)