Clean Water Act discharge permit · NPDES SD0021768
LENNOX, CITY OF, Lennox, SD: NPDES SD0021768 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 34Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
LENNOX, CITY OF, held by City of Lennox, holds NPDES permit SD0021768, which discharges to Long Creek. EPA’s file records it issued July 1, 2017 and expiring June 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 | LENNOX, CITY OF |
|---|---|
| Permittee as filed | City of Lennox |
| NPDES ID | SD0021768 |
| 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 | July 1, 2017 |
| Expiration date | June 30, 2022 |
| Issuing agency | SDDANR |
| Address | Lennox, SD 57039 |
| Receiving water | Long Creek |
| Subwatershed | Upper Long Creek (HUC 101701021001) |
| Program components on file | POTW, Pretreatment |
| NAICS | 221320 – Sewage Treatment Facilities |
| 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
- 36Pollutants on file
- 34Under a numeric limit
- 36With 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 6 | 303 | 36 | July 31, 2011 | 320% over the limit |
| BOD, 5-day, 20 deg. C | 6 | 298 | 31 | July 31, 2019 | 133% over the limit |
| BOD, 5-day, percent removal | 1 | 79 | 13 | June 30, 2020 | 227% over the limit |
| Nitrogen, ammonia total [as N] | 48 | 139 | 11 | March 31, 2025 | 195% over the limit |
| Solids, suspended percent removal | 1 | 75 | 9 | May 31, 2019 | 327% over the limit |
| pH | 2 | 201 | 1 | March 31, 2007 | |
| Coliform, fecal general | 0 | 47 | 1 | June 30, 2011 | 15% over the limit |
| E. coli, colony forming units [CFU] | 2 | 1 | 1 | May 31, 2018 | 131% over the limit |
| Flow rate | 2 | 200 | 0 | ||
| Temperature, water deg. centigrade | 2 | 140 | 0 | ||
| Flow, total | 1 | 70 | 0 | ||
| Chlorine, total residual | 0 | 69 | 0 | ||
| Cyanide, weak acid, dissociable | 2 | 2 | 0 | ||
| Cyanide, total [as CN] | 2 | 2 | 0 | ||
| Hardness, total [as CaCO3] | 2 | 2 | 0 | ||
| Arsenic, total recoverable | 2 | 2 | 0 | ||
| Selenium, total recoverable | 2 | 2 | 0 | ||
| Beryllium, total recoverable [as Be] | 2 | 2 | 0 | ||
| Nickel, total recoverable | 2 | 2 | 0 | ||
| Silver total recoverable | 2 | 2 | 0 | ||
| Zinc, total recoverable | 2 | 2 | 0 | ||
| Cadmium, total recoverable | 2 | 2 | 0 | ||
| Lead, total recoverable | 2 | 2 | 0 | ||
| Chromium, total recoverable | 2 | 2 | 0 | ||
| Copper, total recoverable | 2 | 2 | 0 | ||
| Molybdenum, total recoverable | 2 | 2 | 0 | ||
| Antimony, total recoverable | 2 | 2 | 0 | ||
| Phenols | 2 | 2 | 0 | ||
| Toxicity [chronic], Ceriodaphnia dubia | 2 | 2 | 0 | ||
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | 2 | 2 | 0 | ||
| Mercury, total recoverable | 2 | 2 | 0 | ||
| Oil and grease, hexane extr method | 1 | 1 | 0 | ||
| Thallium, total recoverable | 1 | 1 | 0 | ||
| Thallium, total [as Tl] | 1 | 1 | 0 | ||
| Flowing, Receiving Stream | 1 | 1 | 0 | ||
| Oil and grease visual | 1 | 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
- 4Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| June 27, 2024 | PR: Failure to submit noncompliance report - CSO, SSO, or Bypass [40 CFR 122.41(l)(6) & (m)(3)(ii)] | ST6 |
| June 21, 2024 | Wet-weather SSO discharge to waters of the U.S. that may endanger health or the environment | ST6 |
| June 21, 2024 | Wet-weather unanticipated prohibited bypass discharge to waters of the U.S. - endangerment | ST6 |
| September 1, 2019 | Monitoring Violations - Failure to Monitor for Toxicity Requirements | 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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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.