Clean Water Act discharge permit · NPDES WY0020117
LYMAN WASTEWATER LAGOON, (Unknown City), WY: NPDES WY0020117 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 15Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
LYMAN WASTEWATER LAGOON, held by Lyman, Town of, holds NPDES permit WY0020117. EPA’s file records it issued November 28, 2022 and expiring September 30, 2027. 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 | LYMAN WASTEWATER LAGOON |
|---|---|
| Permittee as filed | Lyman, Town of |
| NPDES ID | WY0020117 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | November 28, 2022 |
| Expiration date | September 30, 2027 |
| Issuing agency | WDEQ |
| Address | (Unknown City), WY |
| Subwatershed | Quarry Creek-Blacks Fork (HUC 140401070105) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 15Pollutants on file
- 15Under a numeric limit
- 14With a violation of any kind
- 6With 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, percent removal | 2 | 72 | 71 | June 30, 2026 | 306% over the limit |
| E. coli | 8 | 40 | 38 | May 31, 2026 | 678% over the limit |
| pH | 8 | 34 | 32 | May 31, 2026 | |
| BOD, 5-day, 20 deg. C | 12 | 37 | 31 | June 30, 2026 | 153% over the limit |
| Solids, total suspended | 9 | 9 | 6 | April 30, 2026 | 208% over the limit |
| Produced water, oil and grease | 3 | 3 | 2 | April 30, 2026 | 660% over the limit |
| Solids, total dissolved | 9 | 44 | 0 | ||
| Flow | 8 | 7 | 0 | ||
| Nitrogen, ammonia total [as N] | 2 | 3 | 0 | ||
| Chlorine, total residual | 4 | 2 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 1 | 0 | ||
| Nitrite + Nitrate total [as N] | 1 | 1 | 0 | ||
| Phosphorus, total [as P] | 1 | 1 | 0 | ||
| Solids, total dissolved [TDS] | 1 | 1 | 0 | ||
| Temperature, water deg. centigrade | 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
- 5Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| March 30, 2026 | Permit Violations - Violation Specified in Comment | ST6 |
| March 30, 2026 | Effluent Violations - Numeric effluent violation | ST6 |
| March 2, 2026 | Permit Violations - Violation Specified in Comment | ST6 |
| June 27, 2025 | Effluent Violations - Numeric effluent violation | ST6 |
| June 12, 2025 | Reporting Violations - Improper/ Incorrect Reporting | 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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Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.