PIONEER CRYOGENIC GAS PLANT
NPDES ID: WY0056499
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.
Violations
February 28, 2026
Fluoride
73% over limit
Discharged 3.45 mg/L against a permitted limit of 2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2026
Fluoride
97% over limit
Discharged 3.93 mg/L against a permitted limit of 2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2025
Fluoride
87% over limit
Discharged 3.73 mg/L against a permitted limit of 2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2025
Fluoride
88% over limit
Discharged 3.76 mg/L against a permitted limit of 2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2025
Fluoride
66% over limit
Discharged 3.32 mg/L against a permitted limit of 2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2025
Fluoride
95% over limit
Discharged 3.9 mg/L against a permitted limit of 2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2025
Fluoride
55% over limit
Discharged 3.1 mg/L against a permitted limit of 2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2025
Fluoride
100% over limit
Discharged 4 mg/L against a permitted limit of 2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
June 30, 2025
Fluoride
85% over limit
Discharged 3.7 mg/L against a permitted limit of 2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
May 31, 2025
Solids, total dissolved
0% over limit
Discharged 1260 mg/L against a permitted limit of 5000 mg/L (DAILY MX)
DMR, Limited - Overdue
Fluoride
85% over limit
Discharged 3.7 mg/L against a permitted limit of 2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2025
Fluoride
65% over limit
Discharged 3.3 mg/L against a permitted limit of 2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2025
Fluoride
65% over limit
Discharged 3.3 mg/L against a permitted limit of 2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2025
Fluoride
100% over limit
Discharged 4 mg/L against a permitted limit of 2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2024
Solids, total suspended
0% over limit
Discharged 5 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 5 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 5 mg/L against a permitted limit of 30 mg/L (WKLY AVG)
DMR, Limited - Overdue
Fluoride
100% over limit
Discharged 4 mg/L against a permitted limit of 2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2024
Fluoride
90% over limit
Discharged 3.8 mg/L against a permitted limit of 2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2024
Fluoride
100% over limit
Discharged 4 mg/L against a permitted limit of 2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2024
Fluoride
80% over limit
Discharged 3.6 mg/L against a permitted limit of 2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2024
Fluoride
45% over limit
Discharged 2.9 mg/L against a permitted limit of 2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2024
Fluoride
65% over limit
Discharged 3.3 mg/L against a permitted limit of 2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)