| Violation ID |
Occurred Date |
Violation Type |
(-) Violation Description |
Corrective Action |
Status |
Classification |
Source |
| 1153684 |
03/17/2026 |
CAT1 |
Total Suspended Solids (TSS) Daily Maximum limit is 100 mg/L and reported value was 121 mg/L at INT-002C Formerly 002C1-002C6. |
The elevated TSS is also likely influenced by outage-related activities, which can introduce higher solids loading to the system. MLPP is evaluating operational and treatment options to minimize these impacts, including improved solids settling and potential filtration or controls. |
Violation |
U |
eSMR |
| 1153683 |
02/28/2026 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average limit is 30 mg/L and reported value was 48 mg/L at INT-002B Formerly M002B. |
Concurrent intake samples were collected for each discharge sample. Applying an intake credit by subtracting influent concentrations prior to averaging results in an adjusted monthly average of approximately 27 mg/L, which is below the effluent limit.
These results indicate the elevated TSS is attributable to influent water quality rather than plant operations. MLPP is reporting the exceedance as measured and providing this analysis for Water Board consideration.
This approach is consistent with standard NPDES practices for accounting for intake contributions; MLPP will align future reporting with any direction provided by the Water Board.
|
Violation |
U |
eSMR |
| 1150754 |
12/31/2025 |
DMON |
A sampling deficiency occurred at the main discharge (EFF-002) during the fourth quarter of 2025, in which the required chronic toxicity test was not performed. |
Compliance contractor is implementing annual generation of all NPDEs & other required COCs with quarterly and monthly verification. |
Violation |
U |
eSMR |
| 1150752 |
12/31/2025 |
DMON |
An annual Cyanide sample was missed. |
Sampling contractor is implementing annual generation of all NPDES & other required COCs with quarterly and monthly verification. |
Violation |
U |
eSMR |
| 1150753 |
11/30/2025 |
DMON |
Missed monthly oil and grease sample for November. |
Compliance contractor is implementing monthly confirmation that all required sampling is completed before the end of each monitoring period. |
Violation |
U |
eSMR |
| 1148829 |
08/31/2025 |
DMON |
No monthly oil and grease sample was collected in August due to operational issues that required manual pumping. |
The pumps for this system were all out of commission and undergoing troubleshooting and repairs. Sampling resumed once the system pumps were back online. |
Violation |
U |
eSMR |
| 1148830 |
08/31/2025 |
DMON |
No weekly pH or monthly oil and grease sample was collected during the one week the unit was online in August. |
System has been offline for months undergoing repairs. Sampling will resume when the unit is back online. |
Violation |
U |
eSMR |
| 1145233 |
05/27/2025 |
OEV |
pH Instantaneous Maximum limit is 9 SU and reported value was 9.3 SU at INT-002C Formerly 002C1-002C6. |
Internal inputs into this system are currently being evaluated for pH reduction solutions. |
Violation |
B |
eSMR |
| 1142924 |
03/31/2025 |
DMON |
Quarterly ammonia sample was not collected for the effluent (EFF-002). |
Quarterly Ammonia sample was missed by our contractor that is responsible for collecting our NPDES samples. Systems are being put into place to prevent the re-occurrence of missed sampling events. |
Violation |
U |
eSMR |
| 1142931 |
03/31/2025 |
DMON |
Quarterly dissolved oxygen (DO) sample was not collected for the effluent (EFF-002). |
Quarterly DO sample was missed by our contractor that is responsible for collecting our NPDES samples. Systems are being put into place to prevent the re-occurrence of missed sampling events. |
Violation |
U |
eSMR |
| 1142929 |
03/31/2025 |
DMON |
Quarterly suspended solids (SS) sample was not collected for the effluent (EFF-002). |
Quarterly SS samples was missed by our contractor that is responsible for collecting our NPDES samples. Systems are being put into place to prevent the re-occurrence of missed sampling events. |
Violation |
U |
eSMR |
| 1142927 |
03/31/2025 |
DMON |
Quarterly suspended solids (SS) sample was not collected for the influent (INF-002). |
Quarterly SS samples was missed by our contractor that is responsible for collecting our NPDES samples. Systems are being put into place to prevent the re-occurrence of missed sampling events. |
Violation |
U |
eSMR |
| 1142925 |
02/28/2025 |
DMON |
Weekly Free Available Chlorine and Total Residual Chlorine samples were not collected on discharge during the weeks of:
1/20/2025
1/27/2025
2/3/2025
2/10/2025
|
The site experienced a significant fire on 1/16/25 which resulted in restricted access to all personnel for emergency management into mid-February. Operations were shut down following the incident. This resulted in no representative samples being collected for the month due to incident command safety requirements. |
Violation |
U |
eSMR |
| 1142921 |
02/28/2025 |
DMON |
Weekly pH samples were not collected on discharge during the weeks of:
1/20/2025
1/27/2025
2/3/2025
2/10/2025 |
The site experienced a significant fire on 1/16/25 which resulted in restricted access to all personnel for emergency management into mid-February. Operations were shut down following the incident. This resulted in no representative samples being collected for the month due to incident command safety requirements. |
Violation |
U |
eSMR |
| 1142922 |
02/28/2025 |
DMON |
Weekly pH samples were not collected on influent during the weeks of:
1/20/2025
1/27/2025
2/3/2025
2/10/2025
|
The site experienced a significant fire on 1/16/25 which resulted in restricted access to all personnel for emergency management into mid-February. Operations were shut down following the incident. This resulted in no representative samples being collected for the month due to incident command safety requirements. |
Violation |
U |
eSMR |
| 1142917 |
02/14/2025 |
OEV |
Temperature Instantaneous Maximum limit is 26 Degrees F and reported value was 27.2 Degrees F at EFF-002. |
Corrective actions included reducing unit load to lower heat input to the cooling water system. In addition, extensive internal cleaning was completed in February to address biofouling and improve cooling efficiency. |
Violation |
B |
eSMR |
| 1142923 |
02/10/2025 |
DMON |
A weekly pH sample was not collected on discharge from the internal monitoring point INT-002C during the week of 2/10/2025. |
The site experienced a significant fire on 1/16/25 which resulted in restricted access to all personnel for emergency management into mid-February. Operations were shut down following the incident. This resulted in no representative samples being collected for the month due to incident command safety requirements. |
Violation |
U |
eSMR |
| 1142918 |
02/10/2025 |
DMON |
Weekly Free Available Chlorine and Total Residual Chlorine samples was not collected on discharge from the internal monitoring point INT-002C during the week of 2/10/2025. |
The site experienced a significant fire on 1/16/25 which resulted in restricted access to all personnel for emergency management into mid-February. Operations were shut down following the incident. This resulted in no representative samples being collected for the month due to incident command safety requirements. |
Violation |
U |
eSMR |
| 1140068 |
02/02/2025 |
LREP |
Annual SMR ( SUMRPT ) (Att. D, Std. Prov. VIII.D.8) report for 2024 (2397795) was due on 01-FEB-25 |
|
Violation |
B |
Report |
| 1142919 |
01/31/2025 |
DMON |
Monthly sample of O&G was not collected in January for the internal monitoring point INT-002B |
Monthly samples were scheduled to be collected in late January. The site experienced a significant fire on 1/16/25 which resulted in restricted access to all personnel for emergency management into mid-February. Operations were shut down following the incident, but this resulted in no representative samples being collected for the month. |
Violation |
U |
eSMR |
| 1142920 |
01/31/2025 |
DMON |
Monthly sample of O&G was not collected in January for the internal monitoring point INT-002C |
Monthly samples were scheduled to be collected in late January. The site experienced a significant fire on 1/16/25 which resulted in restricted access to all personnel for emergency management into mid-February. Operations were shut down following the incident, but this resulted in no representative samples being collected for the month. |
Violation |
U |
eSMR |
| 1142928 |
01/31/2025 |
DMON |
Monthly sample of TSS was not collected in January for the monitoring point EFF-004 |
Monthly samples were scheduled to be collected in late January. The site experienced a significant fire on 1/16/25 which resulted in restricted access to all personnel for emergency management into mid-February. Operations were shut down following the incident, but this resulted in no representative samples being collected for the month. |
Violation |
U |
eSMR |
| 1142926 |
01/31/2025 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average (Mean) limit is 30 mg/L and reported value was 44 mg/L at INT-002C Formerly 002C1-002C6. |
Monitoring frequency continues to be on an increased schedule at this location when possible. TSS exceedances tend to occur at this time of year due to increased TSS at the intake from seasonal storms. |
Violation |
B |
eSMR |
| 1139635 |
10/31/2024 |
CAT1 |
Oil and Grease Monthly Average limit is 15 mg/L and reported value was 17 mg/L at INT-002C Formerly 002C1-002C6. |
This internal monitoring point receives water from our oily water separator. New filter media has been installed and results have returned to ND. |
Violation |
B |
eSMR |
| 1139634 |
10/31/2024 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average limit is 30.0 mg/L and reported value was 64 mg/L at INT-002B Formerly M002B. |
This operation condenses intake water and we sample the brine. There is often a lot of blowdown from the unit and TSS from the intake water. |
Violation |
B |
eSMR |
| 1139636 |
10/29/2024 |
DMON |
Unit was offline with no effluent, unable to collect weekly pH sample. |
This is an intermittent operation, sampling is performed when possible. |
Violation |
U |
eSMR |
| 1139637 |
10/01/2024 |
DMON |
Unit was offline with no effluent, unable to collect weekly pH sample. |
This is an intermittent operating unit, sampling is performed when possible |
Violation |
U |
eSMR |
| 1135129 |
09/30/2024 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average limit is 138.0 lb/day and reported value was 352 lb/day at INT-002B Formerly M002B. |
Monitoring frequency has been increased wherever possible on this intermittent system. We are also discussing proper sampling techniques with our contractor to ensure accurate and representative samples are being collected. |
Violation |
B |
eSMR |
| 1135130 |
09/30/2024 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average limit is 30.0 mg/L and reported value was 196 mg/L at INT-002B Formerly M002B. |
Monitoring frequency has been increased wherever possible on this intermittent system. We are also discussing proper sampling techniques with our contractor to ensure accurate and representative samples are being collected. |
Violation |
B |
eSMR |
| 1135131 |
09/24/2024 |
CAT1 |
Total Suspended Solids (TSS) Daily Maximum limit is 100.0 mg/L and reported value was 393 mg/L at INT-002B Formerly M002B. |
Monitoring frequency has been increased wherever possible on this intermittent system. We are also discussing proper sampling techniques with our contractor to ensure accurate and representative samples are being collected. |
Violation |
B |
eSMR |
| 1135128 |
08/01/2024 |
DMON |
The monthly TSS sample for EFF-004 was not collected due to an error in our contractor's internal sampling schedule. |
We have emphasized the importance of monitoring events to our contractor and are working out solutions for alternate personnel to help with sampling if possible. |
Violation |
U |
eSMR |
| 1136574 |
06/30/2024 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average (Mean) limit is 30.0 mg/L and reported value was 70 mg/L at INT-002B Formerly M002B. |
|
Violation |
B |
Report |
| 1137023 |
05/31/2024 |
CAT1 |
Total Suspended Solids (TSS) Monthly Mean limit is 30.0 mg/L and reported value was 46 mg/L at INT-002C Formerly 002C1-002C6. |
|
Violation |
B |
Report |
| 1136530 |
01/11/2024 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.5 SU at INT-002C Formerly 002C1-002C6. |
|
Violation |
B |
Report |
| 1137022 |
12/31/2023 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average limit is 30.0 mg/L and reported value was 31 mg/L at INT-002B Formerly M002B. |
|
Violation |
B |
Report |
| 1134917 |
11/30/2023 |
CAT1 |
Oil and Grease Monthly Average limit is 15.0 mg/L and reported value was 16.0 mg/L at INT-002C Formerly 002C1-002C6. |
|
Violation |
B |
Report |
| 1134916 |
11/21/2023 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.1 SU at INT-002C Formerly 002C1-002C6. |
|
Violation |
B |
Report |
| 1136541 |
08/31/2023 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average (Mean) limit is 138.0 lb/day and reported value was 266 lb/day at INT-002B Formerly M002B. |
|
Violation |
B |
Report |
| 1134915 |
08/31/2023 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average limit is 30.0 mg/L and reported value was 120 mg/L at INT-002B Formerly M002B. |
|
Violation |
B |
Report |
| 1134914 |
08/14/2023 |
CAT1 |
Total Suspended Solids (TSS) Daily Maximum limit is 100.0 mg/L and reported value was 120 mg/L at INT-002B Formerly M002B. |
|
Violation |
B |
Report |
| 1137081 |
07/31/2023 |
CAT2 |
Polychlorinated Biphenyls (PCBs), Sum 30-Day Average limit is 0.0 pg/L and reported value was 135.3 pg/L at EFF-002. |
|
Violation |
B |
Report |
| 1134768 |
06/30/2023 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average limit is 30.0 mg/L and reported value was 173 mg/L at INT-002C Formerly 002C1-002C6. |
|
Violation |
B |
Report |
| 1134792 |
06/26/2023 |
CAT1 |
Total Suspended Solids (TSS) Daily Maximum limit is 100.0 mg/L and reported value was 173 mg/L at INT-002C Formerly 002C1-002C6. |
|
Violation |
B |
Report |
| 1134430 |
06/06/2023 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.2 SU at INT-002C Formerly 002C1-002C6. |
|
Violation |
B |
Report |
| 1134433 |
04/30/2023 |
DMON |
Total Suspended Solids (TSS) Monthly Average limit is 138 lb/day and discharger did not report required calculated TSS at INT-002B Formerly M002B. |
|
Violation |
B |
Report |
| 1134429 |
04/12/2023 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.3 SU at INT-002C Formerly 002C1-002C6. |
|
Violation |
B |
Report |
| 1134420 |
03/31/2023 |
DMON |
For effluent EFF-004, the monthly Total Suspended Solids (TSS) sample was not collected in January. This was due in part to staff changes in the sampling company, and due to the inability to collect a sample, as no discharge was being produced at certain times throughout the month. |
|
Violation |
B |
Report |
| 1133022 |
03/31/2023 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average (Mean) limit is 30.0 mg/L and reported value was 34 mg/L at INT-002B Formerly M002B. |
|
Violation |
B |
Report |
| 1134911 |
12/30/2022 |
OEV |
pH Instantaneous Maximum limit is 9 SU and reported value was 9.2 SU at INT-002B Formerly M002B. |
|
Violation |
B |
Report |
| 1134913 |
10/10/2022 |
CAT2 |
Cyanide, Total (as CN) 6-Month Median limit is 8.4 ug/L and reported value was 12.1 ug/L at EFF-002. |
|
Violation |
B |
Report |
| 1134907 |
09/30/2022 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average limit is 30.0 mg/L and reported value was 83 mg/L at INT-002B Formerly M002B. |
|
Violation |
B |
Report |
| 1134908 |
07/31/2022 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average limit is 30.0 mg/L and reported value was 36 mg/L at INT-002C Formerly 002C1-002C6. |
|
Violation |
B |
Report |
| 1134811 |
07/31/2022 |
CAT2 |
Polychlorinated Biphenyls (PCBs), Sum 30-Day Average limit is 0.0 pg/L and reported value was 195.8 pg/L at EFF-002. |
|
Violation |
B |
Report |
| 1136578 |
06/30/2022 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average (Mean) limit is 30.0 mg/L and reported value was 121 mg/L at INT-002C Formerly 002C1-002C6. |
|
Violation |
B |
Report |
| 1134905 |
06/08/2022 |
CAT1 |
Total Suspended Solids (TSS) Maximum Daily (MDEL) limit is 100.0 mg/L and reported value was 121 mg/L at INT-002C Formerly 002C1-002C6. |
|
Violation |
B |
Report |
| 1136577 |
05/31/2022 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average (Mean) limit is 30.0 mg/L and reported value was 286 mg/L at INT-002C Formerly 002C1-002C6. |
|
Violation |
B |
Report |
| 1134906 |
05/18/2022 |
CAT1 |
Total Suspended Solids (TSS) Maximum Daily (MDEL) limit is 100.0 mg/L and reported value was 286 mg/L at INT-002C Formerly 002C1-002C6. |
|
Violation |
B |
Report |
| 1134904 |
03/03/2022 |
OEV |
pH Instantaneous Maximum limit is 9 SU and reported value was 9.1 SU at INT-002B Formerly M002B. |
|
Violation |
B |
Report |
| 1136576 |
02/28/2022 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average (Mean) limit is 30.0 mg/L and reported value was 38 mg/L at INT-002C Formerly 002C1-002C6. |
|
Violation |
B |
Report |
| 1134903 |
02/11/2022 |
OEV |
pH Instantaneous Maximum limit is 9 SU and reported value was 9.2 SU at INT-002B Formerly M002B. |
|
Violation |
B |
Report |
| 1134902 |
01/17/2022 |
OEV |
pH Instantaneous Maximum limit is 9 SU and reported value was 9.1 SU at INT-002B Formerly M002B. |
|
Violation |
B |
Report |
| 1134901 |
01/12/2022 |
OEV |
pH Instantaneous Maximum limit is 9 SU and reported value was 9.1 SU at INT-002B Formerly M002B. |
|
Violation |
B |
Report |
| 1134898 |
01/05/2022 |
OEV |
pH Instantaneous Maximum limit is 9 SU and reported value was 9.1 SU at INT-002B Formerly M002B. |
|
Violation |
B |
Report |
| 1136529 |
12/29/2021 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.2 SU at INT-002B Formerly M002B. *** MMP Exempt Reason:Exempt based on further investigation by Central Coast Water Board Prosecution Team. |
|
Violation |
B |
Report |
| 1134810 |
12/15/2021 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.3 SU at INT-002B Formerly M002B. *** MMP Exempt Reason:Exempt based on further investigation by Central Coast Water Board Prosecution Team. |
|
Violation |
B |
Report |
| 1136528 |
12/08/2021 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.2 SU at INT-002B Formerly M002B. *** MMP Exempt Reason:Exempt based on further investigation by Central Coast Water Board Prosecution Team. |
|
Violation |
B |
Report |
| 1135458 |
11/10/2021 |
CAT2 |
Polychlorinated Biphenyls (PCBs), Sum 30-Day Average limit is 0.0 pg/L and reported value was 95.8 pg/L at EFF-002. *** MMP Exempt Reason:Exempt based on further investigation by Central Coast Water Board Prosecution Team. |
|
Violation |
B |
Report |
| 1135453 |
09/30/2021 |
DMON |
Did not report 6-month median for copper in lbs/day. |
|
Violation |
B |
Report |
| 1134807 |
07/27/2021 |
OEV |
pH Instantaneous Maximum limit is 9 SU and reported value was 9.2 SU at INT-002B Formerly M002B. *** MMP Exempt Reason:Exempt based on further investigation by Central Coast Water Board Prosecution Team. |
|
Violation |
B |
Report |
| 1134805 |
07/06/2021 |
OEV |
pH Instantaneous Maximum limit is 9 SU and reported value was 9.3 SU at INT-002B Formerly M002B. *** MMP Exempt Reason:Exempt based on further investigation by Central Coast Water Board Prosecution Team. |
|
Violation |
B |
Report |
| 1136526 |
06/14/2021 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.3 SU at INT-002B Formerly M002B. *** MMP Exempt Reason:Exempt based on further investigation by Central Coast Water Board Prosecution Team. |
|
Violation |
B |
Report |
| 1134804 |
06/07/2021 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.3 SU at INT-002B Formerly M002B. |
|
Violation |
B |
Report |
| 1136525 |
06/04/2021 |
OEV |
pH Instantaneous Maximum limit is 9. SU and reported value was 9.1 SU at INT-002B Formerly M002B. |
|
Violation |
B |
Report |
|
Report displays most recent five years of violations. Refer to the Interactive Violation Report for more data.
|