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Clean Water Act discharge permit · NPDES IA0074284

LAKE RIDGE, Iowa City, IA: NPDES IA0074284 discharge permit, effluent exceedances, inspections, penalties

LAKE RIDGE, held by HAVENPARK MANAGEMENT, holds NPDES permit IA0074284. EPA’s file records it issued November 1, 2019 and expiring October 31, 2024.

LAKE RIDGE, Iowa City, Iowa: Individual permit IA0074284, held by HAVENPARK MANAGEMENT; Administratively continued (past its expiration date and still in force until reissued); issued November 1, 2019, term to October 31, 2024, by STA; Other Similar Organizations [except Business, Professional, Labor, and Political Organizations].

  • Chlorine, total residual: 4 limits, 142 violations of any kind, 40 effluent exceedances, latest May 31, 2026, largest 8,151% over the limit.
  • Solids, total suspended: 9 limits, 107 violations of any kind, 29 effluent exceedances, latest March 31, 2026, largest 28,658% over the limit.
  • Nitrogen, ammonia total [as N]: 96 limits, 71 violations of any kind, 23 effluent exceedances, latest June 30, 2026, largest 346% over the limit.
  • BOD, carbonaceous [5 day, 20 C]: 4 limits, 97 violations of any kind, 21 effluent exceedances, latest March 31, 2026, largest 30,622% over the limit.
  • Oxygen, dissolved [DO]: 1 limit, 26 violations of any kind, 5 effluent exceedances, latest June 30, 2017, largest 66% over the limit.
  • pH: 5 limits, 40 violations of any kind, 2 effluent exceedances, latest July 31, 2021.
  • E. coli: 1 limit, 11 violations of any kind, 2 effluent exceedances, latest October 31, 2021, largest 406% over the limit.
  • Oil & Grease: 2 limits, 38 violations of any kind, 0 effluent exceedances.
  • BOD, 5-day, 20 deg. C: 5 limits, 0 violations of any kind, 0 effluent exceedances.

Other permits held by HAVENPARK MANAGEMENT

LAKE RIDGE among its neighbors

EPA’s permit file holds 19 discharge permits in the Ralston Creek-Iowa River subwatershed (HUC 070802090703), IA0074284 among them. Its county holds 47, 4 of them major permits; IA0074284 is a minor permit.

Other permits in the Ralston Creek-Iowa River subwatershed (HUC 070802090703)

Identity

Facility as filedLAKE RIDGE
Permittee as filedHAVENPARK MANAGEMENT
NPDES IDIA0074284
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
IssuedNovember 1, 2019
Expiration dateOctober 31, 2024
Issuing agencySTA
AddressIowa City, IA 52245
SubwatershedRalston Creek-Iowa River (HUC 070802090703)
NAICS813990 – Other Similar Organizations [except Business, Professional, Labor, and Political Organizations]
SIC8641 – Civic And Social Associations

Effluent limits and exceedances

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 measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Chlorine, total residual414240May 31, 20268,151% over the limit
Solids, total suspended910729March 31, 202628,658% over the limit
Nitrogen, ammonia total [as N]967123June 30, 2026346% over the limit
BOD, carbonaceous [5 day, 20 C]49721March 31, 202630,622% over the limit
Oxygen, dissolved [DO]1265June 30, 201766% over the limit
pH5402July 31, 2021
E. coli1112October 31, 2021406% over the limit
Oil & Grease2380
BOD, 5-day, 20 deg. C500

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES IA0074284.

Inspections

EPA’s inspection file holds no inspection for NPDES IA0074284.

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 IA0074284.

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Nearby on the register

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

What this page shows

This public-records page covers Clean Water Act discharge permit NPDES IA0074284 for LAKE RIDGE in Iowa City, IA, held by HAVENPARK MANAGEMENT, which EPA's file shows as administratively continued after its October 31, 2024 expiration. The page lists the permit as a Minor Discharger class with 9 pollutants under a numeric limit and 7 pollutants with an effluent exceedance.