| Violation ID |
Occurred Date |
Violation Type |
(-) Violation Description |
Corrective Action |
Status |
Classification |
Source |
| 1146001 |
05/18/2025 |
CTOX |
Chronic Toxicity-Giant Kelp-Germination Maximum Daily (MDEL) limit is 50 % effect and reported value was 56.22 % effect at EFF-003. |
AES will implement an accelerated monitoring schedule for chronic toxicity at EFF-003. As discussed with Lala Kabadaian, it is infeasible to conduct four tests over an eight-week period considering how infrequently the units operate under their current contract with the California Department of Water Resources. AES plans to have MBC Aquatics conduct chronic toxicity tests at EFF-003 during the next four startups of Unit 5, which discharges once-through cooling water to EFF-003.
The first of the four required samples was collected on 6/13/25, and the sample passed testing with a % effect of 6.51 for germination. |
Violation |
U |
eSMR |
| 1145996 |
05/02/2025 |
CAT2 |
Copper, Total Maximum Daily (MDEL) limit is 16 lb/day and reported value was 20.76 lb/day at EFF-003. |
EFF-003 discharges only once-through cooling water drawn from the Los Cerritos Channel, which is listed by the Water Board as an impaired waterbody for copper and other metals. At this time, AES has not identified any internal plant sources that could account for the elevated copper and nickel levels and believes that the exceedances are probably attributable to the presence of these constituents in the source water from the Los Cerritos Channel. |
Violation |
U |
eSMR |
| 1146002 |
05/02/2025 |
CAT2 |
Copper, Total Maximum Daily (MDEL) limit is 9.3 ug/L and reported value was 17.6 ug/L at EFF-003. |
EFF-003 discharges only once-through cooling water drawn from the Los Cerritos Channel, which is listed by the Water Board as an impaired waterbody for copper and other metals. At this time, AES has not identified any internal plant sources that could account for the elevated copper and nickel levels and believes that the exceedances are probably attributable to the presence of these constituents in the source water from the Los Cerritos Channel. |
Violation |
U |
eSMR |
| 1146000 |
05/02/2025 |
CAT2 |
Copper, Total Monthly Average limit is 5.6 lb/day and reported value was 20.76 lb/day at EFF-003. |
EFF-003 discharges only once-through cooling water drawn from the Los Cerritos Channel, which is listed by the Water Board as an impaired waterbody for copper and other metals. At this time, AES has not identified any internal plant sources that could account for the elevated copper and nickel levels and believes that the exceedances are probably attributable to the presence of these constituents in the source water from the Los Cerritos Channel. |
Violation |
U |
eSMR |
| 1145999 |
05/02/2025 |
CAT2 |
Copper, Total Monthly Average limit is 8.0 ug/L and reported value was 17.6 ug/L at EFF-003. |
EFF-003 discharges only once-through cooling water drawn from the Los Cerritos Channel, which is listed by the Water Board as an impaired waterbody for copper and other metals. At this time, AES has not identified any internal plant sources that could account for the elevated copper and nickel levels and believes that the exceedances are probably attributable to the presence of these constituents in the source water from the Los Cerritos Channel. |
Violation |
U |
eSMR |
| 1145995 |
05/02/2025 |
CAT2 |
Nickel, Total Maximum Daily (MDEL) limit is 14 ug/L and reported value was 164 ug/L at EFF-003. |
EFF-003 discharges only once-through cooling water drawn from the Los Cerritos Channel, which is listed by the Water Board as an impaired waterbody for copper and other metals. At this time, AES has not identified any internal plant sources that could account for the elevated copper and nickel levels and believes that the exceedances are probably attributable to the presence of these constituents in the source water from the Los Cerritos Channel. |
Violation |
U |
eSMR |
| 1145998 |
05/02/2025 |
CAT2 |
Nickel, Total Maximum Daily (MDEL) limit is 39 lb/day and reported value was 193.48 lb/day at EFF-003. |
EFF-003 discharges only once-through cooling water drawn from the Los Cerritos Channel, which is listed by the Water Board as an impaired waterbody for copper and other metals. At this time, AES has not identified any internal plant sources that could account for the elevated copper and nickel levels and believes that the exceedances are probably attributable to the presence of these constituents in the source water from the Los Cerritos Channel. |
Violation |
U |
eSMR |
| 1145997 |
05/02/2025 |
CAT2 |
Nickel, Total Monthly Average limit is 13 lb/day and reported value was 193.48 lb/day at EFF-003. |
EFF-003 discharges only once-through cooling water drawn from the Los Cerritos Channel, which is listed by the Water Board as an impaired waterbody for copper and other metals. At this time, AES has not identified any internal plant sources that could account for the elevated copper and nickel levels and believes that the exceedances are probably attributable to the presence of these constituents in the source water from the Los Cerritos Channel. |
Violation |
U |
eSMR |
| 1146003 |
05/02/2025 |
CAT2 |
Nickel, Total Monthly Average limit is 4.5 ug/L and reported value was 164 ug/L at EFF-003. |
EFF-003 discharges only once-through cooling water drawn from the Los Cerritos Channel, which is listed by the Water Board as an impaired waterbody for copper and other metals. At this time, AES has not identified any internal plant sources that could account for the elevated copper and nickel levels and believes that the exceedances are probably attributable to the presence of these constituents in the source water from the Los Cerritos Channel. |
Violation |
U |
eSMR |
| 1140035 |
12/31/2024 |
DMON |
Not able to sample stormwater for priority pollutants due to dry period. |
Schedule priority pollutant testing for earlier in the year. |
Violation |
U |
eSMR |
| 1140036 |
12/31/2024 |
DMON |
Not able to sample stormwater for priority pollutants due to dry period. |
Schedule priority pollutant testing for earlier in year. |
Violation |
U |
eSMR |
| 1116630 |
01/09/2023 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.23 SU at INT-001A. |
Removal of excess algae in retention basin. |
Violation |
B |
eSMR |
| 1116631 |
01/06/2023 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.16 SU at INT-001A. |
Retention basin skimmed to remove excess algae. |
Violation |
B |
eSMR |
| 1125277 |
01/04/2023 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.39 SU at INT-001A. |
|
Violation |
B |
Report |
| 1116634 |
01/04/2023 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.43 SU at INT-001A. |
Skimmed retention pond for excess algae. |
Violation |
B |
eSMR |
| 1116633 |
01/03/2023 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.47 SU at INT-001A. |
Skimmed basin for excess algae growth. |
Violation |
B |
eSMR |
| 1125276 |
01/03/2023 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.48 SU at INT-001A. |
|
Violation |
B |
Report |
| 1116632 |
01/02/2023 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.55 SU at INT-001A. |
Skimmed basin for excess algae. |
Violation |
B |
eSMR |
| 1125275 |
01/02/2023 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.56 SU at INT-001A. |
|
Violation |
B |
Report |
| 1102639 |
12/14/2021 |
DMON |
Missing cyanide |
|
Violation |
B |
Report |
| 1102640 |
12/14/2021 |
DMON |
Missing cyanide |
|
Violation |
B |
Report |
| 1102636 |
12/02/2021 |
DMON |
Missing 1,1,2-trichloroethane, antimony, beryllium, and thallium |
|
Violation |
B |
Report |
| 1102637 |
12/02/2021 |
DMON |
Missing 1,1,2-trichloroethane, antimony, beryllium, and thallium |
|
Violation |
B |
Report |
| 1085710 |
12/31/2020 |
DMON |
BOD missing for O-48 |
|
Violation |
B |
Report |
| 1085711 |
12/31/2020 |
DMON |
BOD missing for O-84 |
|
Violation |
B |
Report |
|
Report displays most recent five years of violations. Refer to the Interactive Violation Report for more data.
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