Clean Water Act discharge permit · NPDES OH0121355

COUNTRYSIDE MHP, Amlin, OH: NPDES OH0121355 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
14Pollutants under a numeric limit
6Pollutants with an effluent exceedance

COUNTRYSIDE MHP, held by Dublin MHP LLC, holds NPDES permit OH0121355. EPA’s file records it issued November 22, 2023 and expiring December 31, 2028. 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	COUNTRYSIDE MHP
Permittee as filed	Dublin MHP LLC
NPDES ID	OH0121355
Permit status	Effective
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	November 22, 2023
Expiration date	December 31, 2028
Address	Amlin, OH 43002
Receiving water impaired	303(D) Listed
Subwatershed	Hayden Run-Scioto River (HUC 050600011204)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

Effluent limits and exceedances

17Pollutants on file
14Under a numeric limit
12With 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
Nitrogen, ammonia total [as N]	8	120	116	July 31, 2026	3,230% over the limit
Oxygen, dissolved [DO]	1	53	52	August 31, 2025	80% over the limit
Solids, total suspended	4	55	51	May 31, 2026	2,100% over the limit
BOD, carbonaceous [5 day, 20 C]	4	33	25	April 30, 2026	512% over the limit
Coliform, fecal MF, MFC broth, 44.5 C	0	47	23	September 30, 2008	99,999% over the limit
E. coli, MTEC-MF	2	9	9	July 31, 2026	99,999% over the limit
Temperature, water deg. centigrade	2	2	0
pH	2	2	0
Turbidity [severity]	2	2	0
Flow, in conduit or thru treatment plant	2	2	0
Color, spectrophoto-metric filter	0	2	0
Odor, atmospheric [severity]	0	2	0
Nitrogen, Kjeldahl, total [as N]	2	0	0
Nitrite + Nitrate total [as N]	2	0	0
Phosphorus, total [as P]	2	0	0
Biosolids weight indluding admixtures	2	0	0
Sludge waste from secondary clarifiers	2	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
October 14, 2022	Permit Violations - Failure to Submit Timely Permit Renewal Application	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.

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 OH0121355 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.