SOUTHERN ALLEGHENIES LDFL
NPDES ID: PA0093866
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: 15 effluent violations, 1 single-event violation.
Violations
May 31, 2026
Mercury, total [as Hg]
1000% over limit
Discharged 0.0099 mg/L against a permitted limit of 0.0009 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Mercury, total [as Hg]
2067% over limit
Discharged 0.039 mg/L against a permitted limit of 0.0018 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Iron, total [as Fe]
57% over limit
Discharged 2.36 mg/L against a permitted limit of 1.5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Cyanide, total [as CN]
208% over limit
Discharged 0.123 mg/L against a permitted limit of 0.04 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Cyanide, total [as CN]
900% over limit
Discharged 0.2 mg/L against a permitted limit of 0.02 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
Limit violation
Discharged 46.3 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
Limit violation
Discharged 68.6 mg/L against a permitted limit of 30 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
5% over limit
Discharged 39 mg/L against a permitted limit of 37 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Cyanide, total [as CN]
395% over limit
Discharged 0.099 mg/L against a permitted limit of 0.02 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
310% over limit
Discharged 123 mg/L against a permitted limit of 30 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Cyanide, total [as CN]
225% over limit
Discharged 0.13 mg/L against a permitted limit of 0.04 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
683% over limit
Discharged 117.5 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Iron, total [as Fe]
15% over limit
Discharged 1.73 mg/L against a permitted limit of 1.5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
27% over limit
Discharged 6.2 mg/L against a permitted limit of 4.9 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
173% over limit
Discharged 101 mg/L against a permitted limit of 37 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Cyanide, total [as CN]
185% over limit
Discharged 0.057 mg/L against a permitted limit of 0.02 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Iron, total [as Fe]
21% over limit
Discharged 1.81 mg/L against a permitted limit of 1.5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
Limit violation
Discharged 70.6 mg/L against a permitted limit of 30 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Cyanide, total [as CN]
65% over limit
Discharged 0.066 mg/L against a permitted limit of 0.04 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
992% over limit
Discharged 53.5 mg/L against a permitted limit of 4.9 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
Limit violation
Discharged 37.8 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
824% over limit
Discharged 92.4 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2026
Cyanide, total [as CN]
175% over limit
Discharged 0.11 mg/L against a permitted limit of 0.04 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
193% over limit
Discharged 29.3 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Aluminum, total [as Al]
273% over limit
Discharged 2.8 mg/L against a permitted limit of 0.75 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Iron, total [as Fe]
25% over limit
Discharged 1.87 mg/L against a permitted limit of 1.5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Cyanide, total [as CN]
140% over limit
Discharged 0.048 mg/L against a permitted limit of 0.02 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
453% over limit
Discharged 27.1 mg/L against a permitted limit of 4.9 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Boron, total [as B]
13% over limit
Discharged 15.5 mg/L against a permitted limit of 13.7 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
286% over limit
Discharged 18.9 mg/L against a permitted limit of 4.9 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Cyanide, total [as CN]
75% over limit
Discharged 0.07 mg/L against a permitted limit of 0.04 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
73% over limit
Discharged 26 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Cyanide, total [as CN]
150% over limit
Discharged 0.05 mg/L against a permitted limit of 0.02 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
137% over limit
Discharged 23.7 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2025
Solids, total dissolved
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Barium, total [as Ba]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Oxygen demand, chem. [high level] [COD]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Boron, total [as B]
18% over limit
Discharged 16.2 mg/L against a permitted limit of 13.7 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
200% over limit
Discharged 14.7 mg/L against a permitted limit of 4.9 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Hexachlorobenzene
43% over limit
Discharged 0.0001 mg/L against a permitted limit of 0.00007 mg/L (ANNL AVG)
DMR, Limited - Numeric Violation
4,4'-DDT
49400% over limit
Discharged 0.0099 mg/L against a permitted limit of 0.00002 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Cyanide, total [as CN]
105% over limit
Discharged 0.041 mg/L against a permitted limit of 0.02 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
60% over limit
Discharged 16 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Cyanide, total [as CN]
55% over limit
Discharged 0.062 mg/L against a permitted limit of 0.04 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrite + Nitrate total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
pH
0% over limit
Discharged 0 SU against a permitted limit of 0 SU (DAILY MX)
DMR, Monitor Only - Overdue
BOD, carbonaceous [5 day, 20 C]
17% over limit
Discharged 17.5 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
4,4'-DDT
98900% over limit
Discharged 0.0099 mg/L against a permitted limit of 0.00001 mg/L (ANNL AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
28% over limit
Discharged 47.2 mg/L against a permitted limit of 37 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
November 30, 2025
BOD, carbonaceous [5 day, 20 C]
43% over limit
Discharged 21.5 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Cyanide, total [as CN]
250% over limit
Discharged 0.07 mg/L against a permitted limit of 0.02 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
84% over limit
Discharged 9 mg/L against a permitted limit of 4.9 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Iron, total [as Fe]
70% over limit
Discharged 4.6 mg/L against a permitted limit of 2.7 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
52% over limit
Discharged 41 mg/L against a permitted limit of 27 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
72% over limit
Discharged 17.2 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Boron, total [as B]
17% over limit
Discharged 16 mg/L against a permitted limit of 13.7 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Cyanide, total [as CN]
125% over limit
Discharged 0.09 mg/L against a permitted limit of 0.04 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2025
Nitrogen, ammonia total [as N]
246% over limit
Discharged 34.6 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
27% over limit
Discharged 19 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
537% over limit
Discharged 31.2 mg/L against a permitted limit of 4.9 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
15% over limit
Discharged 42.5 mg/L against a permitted limit of 37 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Nitrogen, ammonia total [as N]
110% over limit
Discharged 21 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
90% over limit
Discharged 9.29 mg/L against a permitted limit of 4.9 mg/L (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Mercury, total [as Hg]
56% over limit
Discharged 0.0028 mg/L against a permitted limit of 0.0018 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Mercury, total [as Hg]
67% over limit
Discharged 0.0015 mg/L against a permitted limit of 0.0009 mg/L (MO AVG)
DMR, Limited - Numeric Violation
June 30, 2025
Mercury, total [as Hg]
39% over limit
Discharged 0.00125 mg/L against a permitted limit of 0.0009 mg/L (MO AVG)
DMR, Limited - Numeric Violation
May 31, 2025
Nitrogen, ammonia total [as N]
15% over limit
Discharged 11.5 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Aluminum, total [as Al]
420% over limit
Discharged 3.9 mg/L against a permitted limit of 0.75 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2025
Mercury, total [as Hg]
22% over limit
Discharged 0.0011 mg/L against a permitted limit of 0.0009 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2025
Aluminum, total [as Al]
180% over limit
Discharged 2.1 mg/L against a permitted limit of 0.75 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2024
Hexachlorobenzene
57% over limit
Discharged 0.00011 mg/L against a permitted limit of 0.00007 mg/L (ANNL AVG)
DMR, Limited - Numeric Violation
November 30, 2024
Cyanide, total [as CN]
150% over limit
Discharged 0.1 mg/L against a permitted limit of 0.04 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Cyanide, total [as CN]
205% over limit
Discharged 0.061 mg/L against a permitted limit of 0.02 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Aluminum, total [as Al]
433% over limit
Discharged 4 mg/L against a permitted limit of 0.75 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2024
Barium, total [as Ba]
60% over limit
Discharged 0.16 mg/L against a permitted limit of 0.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2024
Barium, total [as Ba]
45% over limit
Discharged 0.145 mg/L against a permitted limit of 0.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Aluminum, total [as Al]
513% over limit
Discharged 4.6 mg/L against a permitted limit of 0.75 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2024
Barium, total [as Ba]
10% over limit
Discharged 0.11 mg/L against a permitted limit of 0.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Mercury, total [as Hg]
22% over limit
Discharged 0.0011 mg/L against a permitted limit of 0.0009 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)