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Hart WWTP

Sewage treatment plant, Hart, Michigan. NPDES permit MI0048399 expired Oct 1, 2017; its limits still apply. Last 12 months: over a limit 3 times (last February 2026), 56 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 21 days after each period: form A monthly (14 values)
Last report on file
March 2026
Oct 2024 – Sep 2025
0 values over a limit, 70 required values missing, 0 of 9 reports late

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

Period endingParameterReportedLimitOver by
February 2026BOD, carbonaceous [5 day, 20 C], maximum monthly average6.8≤ 4 mg/L70%
February 2026Nitrogen, ammonia total [as N], maximum monthly average.9≤ .5 mg/L80%
February 2026Oxygen, dissolved [DO], daily minimum4.4≥ 4.5 mg/L2%

Limits in force (56)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]daily minimum≥ 4.5 mg/LJan, Feb, Mar, Apr, Sep, Oct, Nov, Dec001
pHdaily minimum≥ 6.5 SUJan, Feb, Mar, Apr, Sep, Oct, Nov, Dec001
pHdaily maximum≤ 9 SUJan, Feb, Mar, Apr, Sep, Oct, Nov, Dec001
Solids, total suspendedmaximum monthly average≤ 20 mg/LJan, Feb, Mar, Apr, Sep, Oct, Nov, Dec001
Solids, total suspended7-day average≤ 30 mg/LJan, Feb, Mar, Apr, Sep, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]maximum monthly average≤ .5 mg/LJan, Feb, Mar, Apr, Sep, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 2 mg/LJan, Feb, Mar, Apr, Sep, Oct, Nov, Dec001
Phosphorus, total [as P]maximum monthly average≤ 2.7 lb/dJan, Feb, Mar, Apr, Sep, Oct, Nov, Dec001
Flow, in conduit or thru treatment plantmaximum monthly averagereport only (MGD)Jan, Feb, Mar, Apr, Sep, Oct, Nov, Dec001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)Jan, Feb, Mar, Apr, Sep, Oct, Nov, Dec001
Coliform, fecal generalmaximum monthly geometric mean≤ 200 #/100mLJan, Feb, Mar, Apr, Sep, Oct, Nov, Dec001
Coliform, fecal generalmaximum 7-day geometric mean≤ 400 #/100mLJan, Feb, Mar, Apr, Sep, Oct, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]maximum monthly average≤ 4 mg/LJan, Feb, Mar, Apr, Sep, Oct, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 10 mg/LJan, Feb, Mar, Apr, Sep, Oct, Nov, Dec001
Solids, totalmonthly minimumreport only (%)OctSLD
Solids, totalmonthly averagereport only (%)OctSLD
Solids, totalmonthly totalreport only (%)OctSLD
Arsenic, dry weightmonthly minimumreport only (mg/kg)OctSLD
Arsenic, dry weightmonthly averagereport only (mg/kg)OctSLD
Arsenic, dry weightmonthly maximumreport only (mg/kg)OctSLD
Selenium, dry weightmonthly minimumreport only (mg/kg)OctSLD
Selenium, dry weightmonthly averagereport only (mg/kg)OctSLD
Selenium, dry weightmonthly maximumreport only (mg/kg)OctSLD
Copper, dry weightmonthly minimumreport only (mg/kg)OctSLD
Copper, dry weightmonthly averagereport only (mg/kg)OctSLD
Copper, dry weightmonthly maximumreport only (mg/kg)OctSLD
Cadmium, dry weightmonthly minimumreport only (mg/kg)OctSLD
Cadmium, dry weightmonthly averagereport only (mg/kg)OctSLD
Cadmium, dry weightmonthly maximumreport only (mg/kg)OctSLD
Nitrogen, total Kjeldahlmonthly minimumreport only (mg/kg)OctSLD
Nitrogen, total Kjeldahlmonthly averagereport only (mg/kg)OctSLD
Nitrogen, total Kjeldahlmonthly maximumreport only (mg/kg)OctSLD
Molybdenum, sludge, total, dry weight [as Mo]monthly minimumreport only (mg/kg)OctSLD
Molybdenum, sludge, total, dry weight [as Mo]monthly averagereport only (mg/kg)OctSLD
Molybdenum, sludge, total, dry weight [as Mo]monthly maximumreport only (mg/kg)OctSLD
Zinc, sludge, total, dry weight [as Zn]monthly minimumreport only (mg/kg)OctSLD
Zinc, sludge, total, dry weight [as Zn]monthly averagereport only (mg/kg)OctSLD
Zinc, sludge, total, dry weight [as Zn]monthly maximumreport only (mg/kg)OctSLD
Lead, sludge, total, dry weight [as Pb]monthly minimumreport only (mg/kg)OctSLD
Lead, sludge, total, dry weight [as Pb]monthly averagereport only (mg/kg)OctSLD
Lead, sludge, total, dry weight [as Pb]monthly maximumreport only (mg/kg)OctSLD
Nickel, sludge, total, dry weight [as Ni]monthly minimumreport only (mg/kg)OctSLD
Nickel, sludge, total, dry weight [as Ni]monthly averagereport only (mg/kg)OctSLD
Nickel, sludge, total, dry weight [as Ni]monthly maximumreport only (mg/kg)OctSLD
Nitrogen, sludge, total, dry weight [as N]monthly minimumreport only (mg/kg)OctSLD
Nitrogen, sludge, total, dry weight [as N]monthly averagereport only (mg/kg)OctSLD
Nitrogen, sludge, total, dry weight [as N]monthly maximumreport only (mg/kg)OctSLD
Mercury, sludge, total, dry weight [as Hg]monthly minimumreport only (mg/kg)OctSLD
Mercury, sludge, total, dry weight [as Hg]monthly averagereport only (mg/kg)OctSLD
Mercury, sludge, total, dry weight [as Hg]monthly maximumreport only (mg/kg)OctSLD
Potassium, sludge, total, dry weight [as K]monthly minimumreport only (mg/kg)OctSLD
Potassium, sludge, total, dry weight [as K]monthly averagereport only (mg/kg)OctSLD
Potassium, sludge, total, dry weight [as K]monthly maximumreport only (mg/kg)OctSLD
Phosphorus, sludge, total, dry weight [as P]monthly minimumreport only (mg/kg)OctSLD
Phosphorus, sludge, total, dry weight [as P]monthly averagereport only (mg/kg)OctSLD
Phosphorus, sludge, total, dry weight [as P]monthly maximumreport only (mg/kg)OctSLD

How strict are these limits?

Cited limits by parameter: Michigan'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/MI0048399 · MCP: https://passage-data.com/mcp