Clean Water Act discharge permit · NPDES WA0022497
MARYSVILLE STP, Marysville, WA: NPDES WA0022497 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 2Pollutants with an effluent exceedance
MARYSVILLE STP, held by City Of Marysville Wastewater Treatment Plant, holds NPDES permit WA0022497. EPA’s file records it issued November 1, 2017 and expiring November 30, 2022. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | MARYSVILLE STP |
|---|---|
| Permittee as filed | City Of Marysville Wastewater Treatment Plant |
| NPDES ID | WA0022497 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | November 1, 2017 |
| Expiration date | November 30, 2022 |
| Issuing agency | State |
| Address | Marysville, WA 98270 |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Snohomish River-Frontal Possession Sound (HUC 171100110203) |
| Program components on file | POTW, Pretreatment |
| SIC | 4952 – Sewerage Systems |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 19Pollutants on file
- 0Under a numeric limit
- 19With a violation of any kind
- 2With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Solids, total suspended | 0 | 181 | 33 | May 31, 2026 | 80% over the limit |
| Solids, suspended percent removal | 0 | 22 | 3 | February 28, 2025 | 40% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 0 | 228 | 0 | ||
| Chlorine, total residual | 0 | 165 | 0 | ||
| Flow | 0 | 157 | 0 | ||
| pH | 0 | 140 | 0 | ||
| Coliform, fecal general | 0 | 140 | 0 | ||
| Nitrogen, ammonia total [as N] | 0 | 88 | 0 | ||
| Carbonaceous oxygen demand, % removal | 0 | 38 | 0 | ||
| Di[2-ethylhexyl] phthalate [DEHP] | 0 | 13 | 0 | ||
| Temperature, water deg. centigrade | 0 | 8 | 0 | ||
| Phosphorus, total [as P] | 0 | 5 | 0 | ||
| Oxygen, dissolved [DO] | 0 | 4 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 0 | 4 | 0 | ||
| Nitrite + Nitrate total [as N] | 0 | 4 | 0 | ||
| Phosphorus, dissolved reactive [drp as P] | 0 | 4 | 0 | ||
| Bis[2-chloroisopropyl] ether | 0 | 4 | 0 | ||
| Phenolics, total | 0 | 1 | 0 | ||
| Bis[2-chloro-1-methylethyl] ether | 0 | 1 | 0 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES WA0022497.
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
Watch this permit
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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID WA0022497 there.
Nearby on the register
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- Discharge permits in Washington
- Every permit record in Washington, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.