Clean Water Act discharge permit · NPDES OR0020168
FOREST GROVE STP, Forest Grove, OR: NPDES OR0020168 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 25Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
FOREST GROVE STP, held by CLEAN WATER SERVICES, holds NPDES permit OR0020168, which discharges to Tualatin River (Rm 56.7). EPA’s file records it issued June 1, 2016 and expiring May 31, 2021. 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 | FOREST GROVE STP |
|---|---|
| Permittee as filed | CLEAN WATER SERVICES |
| NPDES ID | OR0020168 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | June 1, 2016 |
| Expiration date | May 31, 2021 |
| Address | Forest Grove, OR 97116 |
| Receiving water | TUALATIN RIVER (RM 56.7) |
| Subwatershed | City of Forest Grove-Tualatin River (HUC 170900100206) |
| 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
- 25Pollutants on file
- 25Under a numeric limit
- 23With a violation of any kind
- 3With 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 | 25 | 81 | 3 | July 31, 2024 | 16% over the limit |
| Temperature, water deg. fahrenheit | 1 | 5 | 2 | May 31, 2021 | 6% over the limit |
| pH | 6 | 34 | 1 | February 29, 2024 | |
| Nitrogen, ammonia total [as N] | 12 | 48 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 25 | 35 | 0 | ||
| Methylmercury | 8 | 34 | 0 | ||
| Flow rate | 2 | 25 | 0 | ||
| Flow, in conduit or thru treatment plant | 8 | 19 | 0 | ||
| Oxygen, dissolved [DO] | 3 | 19 | 0 | ||
| Mercury, dissolved [as Hg] | 4 | 18 | 0 | ||
| Mercury, total [as Hg] | 4 | 18 | 0 | ||
| Duration | 2 | 16 | 0 | ||
| Phosphorus, total [as P] | 4 | 15 | 0 | ||
| E. coli | 8 | 13 | 0 | ||
| Excess thermal load | 2 | 13 | 0 | ||
| Temperature, water deg. centigrade | 4 | 11 | 0 | ||
| Ultraviolet light dosage | 2 | 11 | 0 | ||
| Nitrite + Nitrate total [as N] | 2 | 8 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 8 | 0 | ||
| Solids, total dissolved | 1 | 4 | 0 | ||
| BOD, carb-5 day, 20 deg C, percent removal | 2 | 3 | 0 | ||
| Solids, suspended percent removal | 2 | 3 | 0 | ||
| Alkalinity, total [as CaCO3] | 1 | 3 | 0 | ||
| Chlorine, total residual | 1 | 0 | 0 | ||
| Report due [yrmoda] | 1 | 0 | 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
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| July 1, 2017 | Effluent Violations - Numeric effluent violation | ST6 |
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.
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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 OR0020168 there.
Nearby on the register
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- Every permit record in Forest Grove, A to Z
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- Every permit record in Oregon, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.