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MARYSVILLE STP
| WA0022497 | Active | Municipal NPDES IP | MARYSVILLE | Snohomish | 2/1/2025 | N/A | Effluent Violations | Numeric effluent violation | | | | 2763 | | Leung: In early this month, the weather was cold with snows in the areas. A large portion of their lagoon system was frozen over causing lagoon process performance upset resulting in elevated TSS levels during that time. It's getting better later this month, but the overall effluent TSS levels are still higher than the permit limits. | | |
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MARYSVILLE STP
| WA0022497 | Active | Municipal NPDES IP | MARYSVILLE | Snohomish | 2/1/2025 | N/A | Effluent Violations | Numeric effluent violation | | | | 52.7 | | Leung: In early this month, the weather was cold with snows in the areas. A large portion of their lagoon system was frozen over causing lagoon process performance upset resulting in elevated TSS levels during that time. It's getting better later this month, but the overall effluent TSS levels are still higher than the permit limits. | | |
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MARYSVILLE STP
| WA0022497 | Active | Municipal NPDES IP | MARYSVILLE | Snohomish | 2/1/2025 | N/A | Effluent Violations | Numeric effluent violation | | | | 40.8333 | | Leung: In early this month, the weather was cold with snows in the areas. A large portion of their lagoon system was frozen over causing lagoon process performance upset resulting in elevated TSS levels during that time. It's getting better later this month, but the overall effluent TSS levels are still higher than the permit limits. | | |
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MARYSVILLE STP
| WA0022497 | Active | Municipal NPDES IP | MARYSVILLE | Snohomish | 2/1/2025 | N/A | Effluent Violations | Numeric effluent violation | | | | 2291.67 | | Leung: In early this month, the weather was cold with snows in the areas. A large portion of their lagoon system was frozen over causing lagoon process performance upset resulting in elevated TSS levels during that time. It's getting better later this month, but the overall effluent TSS levels are still higher than the permit limits. | | |
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MARYSVILLE STP
| WA0022497 | Active | Municipal NPDES IP | MARYSVILLE | Snohomish | 2/1/2025 | N/A | Effluent Violations | Numeric effluent violation | | | | 79 | | Leung: In early this month, the weather was cold with snows in the areas. A large portion of their lagoon system was frozen over causing lagoon process performance upset resulting in elevated TSS levels during that time. It's getting better later this mont, but the overall effluent TSS levels are still higher than the permit limits. | | |
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MARYSVILLE STP
| WA0022497 | Active | Municipal NPDES IP | MARYSVILLE | Snohomish | 6/1/2024 | N/A | Effluent Violations | Numeric effluent violation | | | | 31.3333 | | Leung: The elevated effluent TSS levels were due to algae issues in the lagoons. | | |
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MARYSVILLE STP
| WA0022497 | Active | Municipal NPDES IP | MARYSVILLE | Snohomish | 2/1/2023 | N/A | Design Criteria Exceedance | Exceedance of Design Criteria | | | | 21061.4 | | Leung: Staff continue investigating the causes of the higher influent BOD5 loadings. All effluent levels are in compliance with permit limits. | | |
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MARYSVILLE STP
| WA0022497 | Active | Municipal NPDES IP | MARYSVILLE | Snohomish | 12/1/2022 | N/A | Effluent Violations | Numeric effluent violation | | | | 32 | | It's due to the flow discharged through Outfall 001 or Outfall 100 during the monitoring period. It's a permit violation if the calculations of effluent TSS MoAvg are based on data for Outfall 100 only but it's not a permit violation if calculations are based on all data from Outfall 001 and Outfall 100. This is not a permit violation. This is a DMR setup issue in the current permit. | | |
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MARYSVILLE STP
| WA0022497 | Active | Municipal NPDES IP | MARYSVILLE | Snohomish | 5/31/2022 | N/A | Reporting Violations | Failure to submit required report (non-DMR, non-pretreatment) | | | | | | The permit renewal application submittal is due 5/31/22. It's received on 5/31/22. However, the submittal due date is listed 5/21/22 in PARIS. This was a setup error in PARIS. This is not a late submittal/permit violation. | | |
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MARYSVILLE STP
| WA0022497 | Active | Municipal NPDES IP | MARYSVILLE | Snohomish | 5/1/2022 | N/A | Effluent Violations | Numeric effluent violation | | | | 31.8889 | | It's due to the flow discharged through Outfall 001 or Outfall 100 during the monitoring period. It's a permit violation if the calculations of effluent TSS MoAvg are based on data for Outfall 100 only but it's not a permit violation if calculations are based on all data from Outfall 001 and Outfall 100. This is not a permit violation. This is a DMR setup issue in the current permit. | | |