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Hillsdale Water Corporation

Water Supply, Hillsdale, Indiana. NPDES permit IN0004804, in force until Dec 31, 2027. Last 12 months: over a limit 3 times (last December 2025). Source: EPA ECHO, Oct 22, 2026.

Reports due: About 28 days after each period: form A quarterly (11 values)
Renewal application due: Jul 4, 2027 · 180 days before expiry; your permit may set another date
Last report on file: June 2026
Oct 2024 – Sep 2025: 0 values over a limit, 0 required values missing, 0 of 4 reports late

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

Period ending	Parameter	Reported	Limit	Over by
December 2025	Iron, total recoverable, monthly average	2.77 mg/L	≤ 1.7 mg/L	63%
December 2025	Solids, total suspended, daily maximum	165 mg/L	≤ 40 mg/L	313%
December 2025	Solids, total suspended, monthly average	165 mg/L	≤ 20 mg/L	725%

Limits in force (11)

Parameter	Statistic	Limit	Months
pH	daily minimum	≥ 6 SU	Mar, Jun, Sep, Dec
pH	daily maximum	≤ 9 SU	Mar, Jun, Sep, Dec
Solids, total suspended	monthly average	≤ 20 mg/L	Mar, Jun, Sep, Dec
Solids, total suspended	daily maximum	≤ 40 mg/L	Mar, Jun, Sep, Dec
Iron, total recoverable	monthly average	≤ 1.7 mg/L	Mar, Jun, Sep, Dec
Iron, total recoverable	daily maximum	≤ 4 mg/L	Mar, Jun, Sep, Dec
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	Mar, Jun, Sep, Dec
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	Mar, Jun, Sep, Dec
Chlorine, total residual	monthly average	< .06 mg/L	Mar, Jun, Sep, Dec
Chlorine, total residual	daily maximum	< .06 mg/L	Mar, Jun, Sep, Dec
Flow, total	quarterly total	report only (Mgal/qtr)	Mar, Jun, Sep, Dec

How strict are these limits?

Iron, total recoverable, monthly average 1.7 mg/L — stricter than 90% of 90 other minor industrial and other permits in Indiana; 4% have the same limit
Iron, total recoverable, daily maximum 4 mg/L — stricter than 89% of 93 other minor industrial and other permits in Indiana; 5% have the same limit
Solids, total suspended, daily maximum 40 mg/L — stricter than 40% of 259 other minor industrial and other permits in Indiana; 40% have the same limit

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

Same industry: the 95 Water Supply permits in Indiana.

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/IN0004804 · MCP: https://passage-data.com/mcp