Clean Water Act discharge permit · NPDES IN0036951

ZIONSVILLE WWTP, Zionsville, IN: NPDES IN0036951 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MajorDischarger class
16Pollutants under a numeric limit
6Pollutants with an effluent exceedance
1Inspections on file
0Formal enforcement actions

ZIONSVILLE WWTP holds NPDES permit IN0036951, which discharges to Or/W Fk White River/Eagle Creek. EPA’s file records it issued October 12, 2018 and expiring December 31, 2023.

ZIONSVILLE WWTP, Zionsville, Indiana: Individual permit IN0036951; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued October 12, 2018, term to December 31, 2023, by IDEM; discharges to OR/W FK WHITE RIVER/EAGLE CREEK.

E. coli, colony forming units [CFU]: 3 limits, 20 violations of any kind, 20 effluent exceedances, latest June 30, 2026, largest 1,978% over the limit.
Solids, total suspended: 8 limits, 14 violations of any kind, 14 effluent exceedances, latest November 30, 2023, largest 631% over the limit.
Nitrogen, ammonia total [as N]: 8 limits, 4 violations of any kind, 4 effluent exceedances, latest June 30, 2021, largest 517% over the limit.
BOD, carbonaceous [5 day, 20 C]: 8 limits, 2 violations of any kind, 2 effluent exceedances, latest June 30, 2022, largest 82% over the limit.
Oxygen, dissolved [DO]: 2 limits, 1 violation of any kind, 1 effluent exceedance, latest August 31, 2024, largest 10% over the limit.
Chlorine, total residual: 2 limits, 1 violation of any kind, 1 effluent exceedance, latest July 31, 2021, largest 0% over the limit.
Nitrogen, total [as N]: 0 limits, 2 violations of any kind, 0 effluent exceedances.
Ann. amt sludge disposed by other method: 0 limits, 1 violation of any kind, 0 effluent exceedances.
Annual amt of sludge incinerated: 0 limits, 1 violation of any kind, 0 effluent exceedances.
Annual sludge production, total: 0 limits, 1 violation of any kind, 0 effluent exceedances.
Annual amount of sludge land applied: 0 limits, 1 violation of any kind, 0 effluent exceedances.
Annual amt. sludge disposed surface unit: 0 limits, 1 violation of any kind, 0 effluent exceedances.
Annual amt sludge disposed in landfill: 0 limits, 1 violation of any kind, 0 effluent exceedances.
Annual amt sludge transported interstate: 0 limits, 1 violation of any kind, 0 effluent exceedances.
pH: 2 limits, 0 violations of any kind, 0 effluent exceedances.
Number of Events: 2 limits, 0 violations of any kind, 0 effluent exceedances.
Phosphorus, total [as P]: 1 limit, 0 violations of any kind, 0 effluent exceedances.
Flow, in conduit or thru treatment plant: 1 limit, 0 violations of any kind, 0 effluent exceedances.
Toxicity [acute], Ceriodaphnia dubia: 1 limit, 0 violations of any kind, 0 effluent exceedances.
Toxicity [chronic], Ceriodaphnia dubia: 1 limit, 0 violations of any kind, 0 effluent exceedances.
Toxicity [acute], Pimephales promelas [Fathead Minnow]: 1 limit, 0 violations of any kind, 0 effluent exceedances.
Toxicity [chronic], Pimephales promelas [Fathead Minnow]: 1 limit, 0 violations of any kind, 0 effluent exceedances.
Phosphorus, total percent removal: 1 limit, 0 violations of any kind, 0 effluent exceedances.
Flow, total: 1 limit, 0 violations of any kind, 0 effluent exceedances.

February 18, 2026: Evaluation (S).

Indiana holds 541 Publicly owned treatment works coverages of this permit type in EPA’s file; 239 were issued before IN0036951. ZIONSVILLE WWTP holds 2 permits in Indiana.

Other permits held by ZIONSVILLE WWTP

ZIONSVILLE WWTP, Zionsville: INL036951, issued January 1, 2021

Coverages issued nearest IN0036951

October 2, 2018: GALVESTON WASTEWATER TREATMENT PLANT, Galveston, IN0021199
October 2, 2018: ENGLISH WWTP, English, IN0039993, held by ENGLISH WASTEWATER TREATMENT PLANT
October 2, 2018: NORTH SALEM WWTP, North Salem, IN0040436
October 4, 2018: NORTH WEBSTER WWTP, North Webster, IN0040444
October 4, 2018: PATOKA LAKE REGIONAL WATER & SEWER DISTRICT, Dubois, IN0052698
November 7, 2018: NEW PEKIN WASTEWATER TREATMENT PLANT, New Pekin, IN0021059
November 7, 2018: CULVER WASTEWATER TREATMENT PLANT, Culver, IN0021288
November 7, 2018: CLAYTON WWTP, Clayton, IN0021431
November 7, 2018: SUNMAN WWTP, Sunman, IN0021679
November 7, 2018: LAKEVILLE WASTEWATER TREATMENT PLANT, Lakeville, IN0023540

ZIONSVILLE WWTP among its neighbors

EPA’s permit file holds 52 discharge permits in the Irishman Run-Eagle Creek subwatershed (HUC 051202011107), IN0036951 among them. Its county holds 53, 4 of them major permits; IN0036951 is a major permit.

Other permits in the Irishman Run-Eagle Creek subwatershed (HUC 051202011107)

4810 NORTHWESTERN DRIVE - BUILDING ADDITION, Zionsville: INRA09646, minor permit, permit term to May 5, 2027
ADVENT LUTHERAN, Zionsville: INRA15770, minor permit, permit term to April 9, 2030
ALTUM'S REDEVELOPMENT, Zionsville: INRA09589, minor permit, permit term to April 26, 2027
ARTISTIC COMPOSITE PALLETS, Carmel: INRA17331, minor permit, permit term to December 17, 2030
BENNETT PARKWAY OFFICE BUILDING, Zionsville: INRA07281, minor permit, permit term to March 31, 2026
BUCKEYE TERMINALS LLC - ZIONSVILLE TERMINAL, Indianapolis: IN0045209, minor permit, discharging to OR/W FK WHITE/EAGLE CR/UNNAMED TRIB, permit term to January 31, 2020
BUCKEYE ZIONSVILLE TERMINAL, Indianapolis: ING340081, minor permit, discharging to Eagle Creek, permit term to October 31, 2025
CARMEL 116TH ST MULTI-USE PATH, Carmel: INRA13252, minor permit, permit term to February 6, 2029
CARMEL UTILITIES WEST GROUND STORAGE TANK BOOSTER PUMP STATION, Carmel: INRA15371, minor permit, permit term to April 6, 2030
CENTER FOR SIGHT, Zionsville: INRA15330, minor permit, permit term to January 29, 2030

Identity

Facility as filed	ZIONSVILLE WWTP
Permittee as filed	ZIONSVILLE WWTP
NPDES ID	IN0036951
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Major discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	October 12, 2018
Expiration date	December 31, 2023
Issuing agency	IDEM
Address	Zionsville, IN 46077
Receiving water	OR/W FK WHITE RIVER/EAGLE CREEK
Receiving water impaired	303(D) Listed
Subwatershed	Irishman Run-Eagle Creek (HUC 051202011107)

Effluent limits and exceedances

24Pollutants on file
16Under 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
E. coli, colony forming units [CFU]	3	20	20	June 30, 2026	1,978% over the limit
Solids, total suspended	8	14	14	November 30, 2023	631% over the limit
Nitrogen, ammonia total [as N]	8	4	4	June 30, 2021	517% over the limit
BOD, carbonaceous [5 day, 20 C]	8	2	2	June 30, 2022	82% over the limit
Oxygen, dissolved [DO]	2	1	1	August 31, 2024	10% over the limit
Chlorine, total residual	2	1	1	July 31, 2021	0% over the limit
Nitrogen, total [as N]	0	2	0
Ann. amt sludge disposed by other method	0	1	0
Annual amt of sludge incinerated	0	1	0
Annual sludge production, total	0	1	0
Annual amount of sludge land applied	0	1	0
Annual amt. sludge disposed surface unit	0	1	0
Annual amt sludge disposed in landfill	0	1	0
Annual amt sludge transported interstate	0	1	0
pH	2	0	0
Number of Events	2	0	0
Phosphorus, total [as P]	1	0	0
Flow, in conduit or thru treatment plant	1	0	0
Toxicity [acute], Ceriodaphnia dubia	1	0	0
Toxicity [chronic], Ceriodaphnia dubia	1	0	0
Toxicity [acute], Pimephales promelas [Fathead Minnow]	1	0	0
Toxicity [chronic], Pimephales promelas [Fathead Minnow]	1	0	0
Phosphorus, total percent removal	1	0	0
Flow, total	1	0	0

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES IN0036951.

Inspections

Date	What EPA recorded	Agency
February 18, 2026	Evaluation	S

Formal enforcement and penalties

0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.

Informal enforcement

EPA’s informal enforcement file holds no action for NPDES IN0036951.

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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

This public-records page covers Clean Water Act discharge permit NPDES IN0036951 for ZIONSVILLE WWTP in Zionsville, IN, which discharges to OR/W FK WHITE RIVER/EAGLE CREEK and is listed as impaired under 303(D). The permit is shown as administratively continued and is classed as a Major Discharger, with 24 pollutants on file, 16 under a numeric limit, 6 with an effluent exceedance, and the subwatershed given as Irishman Run-Eagle Creek (HUC 051202011107).