Clean Water Act discharge permit · NPDES OH0021750
CALEDONIA WWTP, Caledonia, OH: NPDES OH0021750 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 30Pollutants under a numeric limit
- 9Pollutants with an effluent exceedance
CALEDONIA WWTP, held by Caledonia, Village of, holds NPDES permit OH0021750, which discharges to Olentangy River. EPA’s file records it issued April 4, 2018 and expiring April 30, 2023. 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 | CALEDONIA WWTP |
|---|---|
| Permittee as filed | Caledonia, Village of |
| NPDES ID | OH0021750 |
| 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 | April 4, 2018 |
| Expiration date | April 30, 2023 |
| Address | Caledonia, OH 43314 |
| Receiving water | Olentangy River |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Town of Caledonia-Olentangy River (HUC 050600010804) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 31Pollutants on file
- 30Under a numeric limit
- 15With a violation of any kind
- 9With 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 |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 8 | 84 | 80 | May 31, 2025 | 1,284% over the limit |
| Solids, total suspended | 4 | 26 | 22 | May 31, 2025 | 1,233% over the limit |
| Chlorine, total residual | 1 | 10 | 9 | June 30, 2009 | 27,795% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 4 | 11 | 7 | May 31, 2018 | 573% over the limit |
| Fecal coliform | 1 | 6 | 6 | December 31, 2025 | 1,350% over the limit |
| pH | 2 | 6 | 4 | September 30, 2014 | |
| E. coli, MTEC-MF | 2 | 5 | 3 | September 30, 2024 | 170% over the limit |
| Oxygen, dissolved [DO] | 1 | 4 | 3 | March 31, 2014 | 15% over the limit |
| Fecal coliform in sludge, CFU/gram | 0 | 2 | 2 | December 31, 2015 | 80% over the limit |
| Temperature, water deg. centigrade | 2 | 2 | 0 | ||
| Nitrite + Nitrate total [as N] | 2 | 2 | 0 | ||
| Phosphorus, total [as P] | 2 | 2 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 2 | 0 | ||
| Solids, total dissolved- 180 deg. C | 2 | 2 | 0 | ||
| Overflows | 2 | 2 | 0 | ||
| Biosolids weight indluding admixtures | 4 | 0 | 0 | ||
| Nitrogen, ammonia in bottom deposits | 2 | 0 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 2 | 0 | 0 | ||
| Phosphorous, total, in bottom deposits | 2 | 0 | 0 | ||
| Potassium, in bottom deposits | 2 | 0 | 0 | ||
| Sludge weight, dry | 2 | 0 | 0 | ||
| Sludge waste from secondary clarifiers | 2 | 0 | 0 | ||
| Arsenic, dry weight | 1 | 0 | 0 | ||
| Cadmium, in bottom deposits [dry wgt] | 1 | 0 | 0 | ||
| Copper in bottom deposits [dry wgt] | 1 | 0 | 0 | ||
| Lead, total dry weight [as Pb] | 1 | 0 | 0 | ||
| Nickel, tot in bottom deposits [dry wgt] | 1 | 0 | 0 | ||
| Zinc in bottom deposits [dry wgt] | 1 | 0 | 0 | ||
| Selenium, dry weight | 1 | 0 | 0 | ||
| Mercury, tot in bot deposits [dry wgt] | 1 | 0 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES OH0021750.
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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Start the watch
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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 OH0021750 there.
Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.