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Usfs Hardin Ridge Rec Area

Federal facility (Sewerage Systems), Heltonville, Indiana. NPDES permit IN0024953, in force until Mar 31, 2030. Last 12 months: over a limit 10 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (20 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
9 values over a limit, 0 required values missing, 0 of 12 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
April 2026Solids, total suspended, monthly average10.1 mg/L≤ 10 mg/L1%
May 2026Solids, total suspended, monthly average14.32 mg/L≤ 10 mg/L43%
May 2026Solids, total suspended, monthly average6.62 lb/d≤ 2.8 lb/d136%
May 2026Solids, total suspended, maximum weekly average25.18 lb/d≤ 4.3 lb/d486%
May 2026Solids, total suspended, maximum weekly average35 mg/L≤ 15 mg/L133%
July 2026Phosphorus, total [as P], monthly average1.09 mg/L≤ 1 mg/L9%
July 2026Solids, total suspended, monthly average15.37 mg/L≤ 10 mg/L54%
July 2026Solids, total suspended, maximum weekly average25.4 mg/L≤ 15 mg/L69%
August 2026Solids, total suspended, monthly average14.72 mg/L≤ 10 mg/L47%
August 2026Solids, total suspended, maximum weekly average23 mg/L≤ 15 mg/L53%

Limits in force (24)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily average minimum≥ 6 mg/Lall year
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 10 mg/Lall year
Solids, total suspendedmaximum weekly average≤ 15 mg/Lall year
Solids, total suspendedmonthly average≤ 2.8 lb/dall year
Solids, total suspendedmaximum weekly average≤ 4.3 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 1.1 mg/LMay–Nov
Nitrogen, ammonia total [as N]monthly average≤ 1.6 mg/LJan, Feb, Mar, Apr, Dec
Nitrogen, ammonia total [as N]maximum weekly average≤ 1.6 mg/LMay–Nov
Nitrogen, ammonia total [as N]maximum weekly average≤ 2.4 mg/LJan, Feb, Mar, Apr, Dec
Nitrogen, ammonia total [as N]monthly average≤ .3 lb/dMay–Nov
Nitrogen, ammonia total [as N]monthly average≤ .5 lb/dJan, Feb, Mar, Apr, Dec
Nitrogen, ammonia total [as N]maximum weekly average≤ .5 lb/dMay–Nov
Nitrogen, ammonia total [as N]maximum weekly average≤ .7 lb/dJan, Feb, Mar, Apr, Dec
Phosphorus, total [as P]monthly average≤ 1 mg/Lall year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
E. coli, colony forming units [CFU]monthly geometric mean≤ 125 CFU/100mLApr–Oct
E. coli, colony forming units [CFU]daily maximum≤ 235 CFU/100mLApr–Oct
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 15 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 2.8 lb/dall year
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 4.3 lb/dall year
Flow, totalmonthly totalreport only (Mgal/mo)all year

How strict are these limits?

Cited limits by parameter: Indiana's rules and the federal ones.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IN0024953 · MCP: https://passage-data.com/mcp