LYMAN WASTEWATER LAGOON
NPDES ID: WY0020117
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: 11 effluent violations.
Violations
June 30, 2026
BOD, 5-day, 20 deg. C
47% over limit
Discharged 44 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, percent removal
17% over limit
Discharged 59 % against a permitted limit of 65 % (MO AV MN)
DMR, Limited - Numeric Violation
May 31, 2026
BOD, 5-day, percent removal
20% over limit
Discharged 58 % against a permitted limit of 65 % (MO AV MN)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 9.26 SU against a permitted limit of 9 SU (INST MAX)
DMR, Limited - Numeric Violation
E. coli
245% over limit
Discharged 1990 MPN/100mL against a permitted limit of 576 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2026
Produced water, oil and grease
660% over limit
Discharged 76 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, percent removal
143% over limit
Discharged 15 % against a permitted limit of 65 % (MO AV MN)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
153% over limit
Discharged 76 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 9.4 SU against a permitted limit of 9 SU (INST MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
34% over limit
Discharged 134 mg/L against a permitted limit of 100 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
17% over limit
Discharged 76 mg/L against a permitted limit of 65 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
January 31, 2026
E. coli
3% over limit
Discharged 649 MPN/100mL against a permitted limit of 630 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2025
BOD, 5-day, 20 deg. C
13% over limit
Discharged 34 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, percent removal
77% over limit
Discharged 38 % against a permitted limit of 65 % (MO AV MN)
DMR, Limited - Numeric Violation
July 31, 2025
E. coli
14% over limit
Discharged 659 MPN/100mL against a permitted limit of 576 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
June 30, 2025
BOD, 5-day, percent removal
306% over limit
Discharged -42 % against a permitted limit of 65 % (MO AV MN)
DMR, Limited - Numeric Violation
Solids, total suspended
9% over limit
Discharged 109 mg/L against a permitted limit of 100 mg/L (MO AVG)
DMR, Limited - Numeric Violation
May 31, 2025
pH
0% over limit
Discharged 9.25 SU against a permitted limit of 9 SU (INST MAX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
7% over limit
Discharged 32 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, percent removal
63% over limit
Discharged 43 % against a permitted limit of 65 % (MO AV MN)
DMR, Limited - Numeric Violation
April 30, 2025
pH
0% over limit
Discharged 9.189 SU against a permitted limit of 9 SU (INST MAX)
DMR, Limited - Numeric Violation
BOD, 5-day, percent removal
34% over limit
Discharged 53 % against a permitted limit of 65 % (MO AV MN)
DMR, Limited - Numeric Violation
March 31, 2025
Flow
0% over limit
Discharged 0.424 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Solids, total dissolved
0% over limit
Discharged 400 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
February 28, 2025
Solids, total dissolved
0% over limit
Discharged 492 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
January 31, 2025
Solids, total dissolved
0% over limit
Discharged 544 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
December 31, 2024
Flow
0% over limit
Discharged 0.291 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Solids, total dissolved
0% over limit
Discharged 455.67000175 kg/d against a permitted limit of 911.34000349 kg/d (ANNL MAX)
DMR, Limited - Overdue
Solids, total dissolved
0% over limit
Discharged 544 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
November 30, 2024
Solids, total dissolved
0% over limit
Discharged 508 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
October 31, 2024
pH
0% over limit
Discharged 9.36 SU against a permitted limit of 9 SU (INST MAX)
DMR, Limited - Numeric Violation
BOD, 5-day, percent removal
9% over limit
Discharged 62 % against a permitted limit of 65 % (MO AV MN)
DMR, Limited - Numeric Violation
Solids, total dissolved
0% over limit
Discharged 444 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
September 30, 2024
pH
0% over limit
Discharged 9.34 SU against a permitted limit of 9 SU (INST MAX)
DMR, Limited - Numeric Violation
Solids, total dissolved
0% over limit
Discharged 500 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
BOD, 5-day, percent removal
31% over limit
Discharged 54 % against a permitted limit of 65 % (MO AV MN)
DMR, Limited - Numeric Violation
August 31, 2024
Solids, total dissolved
0% over limit
Discharged 636 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
First flagged
April 14, 2026 (4 months ago)
Last confirmed
August 17, 2026 (5 hours ago)