Clean Water Act discharge permit · NPDES WY0020583
GREYBULL WASTEWATER LAGOON, WY: NPDES WY0020583 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 16Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
GREYBULL WASTEWATER LAGOON, held by Greybull, Town of, holds NPDES permit WY0020583. EPA’s file records it issued May 15, 2017 and expiring June 30, 2022. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | GREYBULL WASTEWATER LAGOON |
|---|---|
| Permittee as filed | Greybull, Town of |
| NPDES ID | WY0020583 |
| 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 | May 15, 2017 |
| Expiration date | June 30, 2022 |
| Issuing agency | WDEQ |
| Address | WY |
| Subwatershed | Lovell Draw-Bighorn River (HUC 100800100301) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 17Pollutants on file
- 16Under a numeric limit
- 17With a violation of any kind
- 8With 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 |
|---|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | 6 | 124 | 28 | December 31, 2024 | 273% over the limit |
| E. coli | 4 | 53 | 21 | August 31, 2023 | 38,306% over the limit |
| Solids, total suspended | 3 | 95 | 17 | July 31, 2025 | 119% over the limit |
| pH | 2 | 49 | 17 | October 31, 2023 | |
| BOD, 5-day, percent removal | 1 | 27 | 11 | December 31, 2024 | 186% over the limit |
| Flow | 2 | 40 | 8 | December 31, 2024 | 82,500% over the limit |
| Solids, suspended percent removal | 0 | 12 | 2 | December 31, 2023 | 81% over the limit |
| Produced water, oil and grease | 2 | 19 | 1 | August 31, 2017 | 500% over the limit |
| Chlorine, total residual | 2 | 38 | 0 | ||
| Nitrogen, ammonia total [as N] | 1 | 26 | 0 | ||
| Temperature, water deg. centigrade | 1 | 13 | 0 | ||
| Duration | 1 | 13 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 6 | 0 | ||
| Nitrite + Nitrate total [as N] | 1 | 6 | 0 | ||
| Phosphorus, total [as P] | 1 | 6 | 0 | ||
| Solids, total dissolved | 1 | 6 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 5 | 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 WY0020583.
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 WY0020583 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.