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Cobblestone Real Estate LLC

Civic And Social Associations, Carleton, Michigan. NPDES permit MI0057704 expired Oct 1, 2025; its limits still apply. Last 12 months: over a limit 9 times (last July 2026), 29 required values missing, 4 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 21 days after each period: outfall 001 form A monthly (23 values), outfall SLD form L yearly (42 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
1 value over a limit, 49 required values missing, 5 of 13 reports late

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

Period endingParameterReportedLimitOver by
October 2025Phosphorus, total [as P], monthly average1.29≤ 1 mg/L29%
November 2025Nitrogen, ammonia total [as N], daily maximum3.15≤ 2 mg/L58%
November 2025Nitrogen, ammonia total [as N], monthly average1.66≤ .5 mg/L232%
February 2026Solids, suspended percent removal, minimum82≥ 85 %20%
March 2026Solids, suspended percent removal, minimum56≥ 85 %193%
April 2026Solids, suspended percent removal, minimum82≥ 85 %20%
May 2026Coliform, fecal general, 7-day geometric mean481≤ 400 #/100mL20%
May 2026Solids, total suspended, 7-day average35≤ 30 mg/L17%
July 2026Coliform, fecal general, 7-day geometric mean1350≤ 400 #/100mL238%

Limits in force (85)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]daily minimum≥ 6 mg/Lall year001
pHdaily minimum≥ 6.5 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 20 mg/LMay–Nov001
Solids, total suspendedmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, Dec001
Solids, total suspended7-day average≤ 30 mg/LMay–Nov001
Solids, total suspended7-day average≤ 45 mg/LJan, Feb, Mar, Apr, Dec001
Solids, total suspendedmonthly average≤ 42 lb/dMay–Nov001
Solids, total suspendedmonthly average≤ 63 lb/dJan, Feb, Mar, Apr, Dec001
Solids, total suspended7-day average≤ 63 lb/dMay–Nov001
Solids, total suspended7-day average≤ 94 lb/dJan, Feb, Mar, Apr, Dec001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Apr001
Nitrogen, ammonia total [as N]monthly average≤ .5 mg/LMay–Nov001
Nitrogen, ammonia total [as N]daily maximum≤ 5.8 mg/LApr001
Nitrogen, ammonia total [as N]daily maximum≤ 6.8 mg/LJan, Feb, Mar, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 2 mg/LMay–Nov001
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)Apr001
Nitrogen, ammonia total [as N]monthly average≤ 1 lb/dMay–Nov001
Nitrogen, ammonia total [as N]7-day average≤ 12 lb/dApr001
Nitrogen, ammonia total [as N]7-day average≤ 14 lb/dJan, Feb, Mar, Dec001
Nitrogen, ammonia total [as N]7-day average≤ 4.2 lb/dMay–Nov001
Phosphorus, total [as P]monthly average≤ 1 mg/Lall year001
Phosphorus, total [as P]daily maximumreport only (mg/L)all year001
Phosphorus, total [as P]monthly average≤ 2.1 lb/dall year001
Phosphorus, total [as P]daily maximumreport only (lb/d)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year001
Coliform, fecal general7-day geometric mean≤ 400 #/100mLall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/LApr001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 12 mg/LJan, Feb, Mar, Dec001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 4 mg/LMay–Nov001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 15 mg/LApr001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 18 mg/LJan, Feb, Mar, Dec001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 10 mg/LMay–Nov001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 21 lb/dApr001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 lb/dJan, Feb, Mar, Dec001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 8.3 lb/dMay–Nov001
BOD, carbonaceous [5 day, 20 C]7-day average≤ 31 lb/dApr001
BOD, carbonaceous [5 day, 20 C]7-day average≤ 38 lb/dJan, Feb, Mar, Dec001
BOD, carbonaceous [5 day, 20 C]7-day average≤ 21 lb/dMay–Nov001
Solids, suspended percent removalminimum≥ 85 %Jan, Feb, Mar, Apr, Dec001
Solids, suspended percent removaldaily minimumreport only (%)Jan, Feb, Mar, Apr, Dec001
Solids, totalmonthly minimumreport only (%)all yearSLD
Solids, totalmonthly averagereport only (%)all yearSLD
Solids, totalmonthly maximumreport only (%)all yearSLD
Arsenic, dry weightmonthly minimumreport only (mg/kg)all yearSLD
Arsenic, dry weightmonthly averagereport only (mg/kg)all yearSLD
Arsenic, dry weightmonthly maximum≤ 75 mg/kgall yearSLD
Selenium, dry weightmonthly minimumreport only (mg/kg)all yearSLD
Selenium, dry weightmonthly averagereport only (mg/kg)all yearSLD
Selenium, dry weightmonthly maximum≤ 100 mg/kgall yearSLD
Copper, dry weightmonthly minimumreport only (mg/kg)all yearSLD
Copper, dry weightmonthly averagereport only (mg/kg)all yearSLD
Copper, dry weightmonthly maximum≤ 4300 mg/kgall yearSLD
Cadmium, dry weightmonthly minimumreport only (mg/kg)all yearSLD
Cadmium, dry weightmonthly averagereport only (mg/kg)all yearSLD
Cadmium, dry weightmonthly maximum≤ 85 mg/kgall yearSLD
Nitrogen, total Kjeldahlmonthly minimumreport only (mg/kg)all yearSLD
Nitrogen, total Kjeldahlmonthly averagereport only (mg/kg)all yearSLD
Nitrogen, total Kjeldahlmonthly maximumreport only (mg/kg)all yearSLD
Molybdenum, sludge, total, dry weight [as Mo]monthly minimumreport only (mg/kg)all yearSLD
Molybdenum, sludge, total, dry weight [as Mo]monthly averagereport only (mg/kg)all yearSLD
Molybdenum, sludge, total, dry weight [as Mo]monthly maximum≤ 75 mg/kgall yearSLD
Zinc, sludge, total, dry weight [as Zn]monthly minimumreport only (mg/kg)all yearSLD
Zinc, sludge, total, dry weight [as Zn]monthly averagereport only (mg/kg)all yearSLD
Zinc, sludge, total, dry weight [as Zn]monthly maximum≤ 7500 mg/kgall yearSLD
Lead, sludge, total, dry weight [as Pb]monthly minimumreport only (mg/kg)all yearSLD
Lead, sludge, total, dry weight [as Pb]monthly averagereport only (mg/kg)all yearSLD
Lead, sludge, total, dry weight [as Pb]monthly maximum≤ 840 mg/kgall yearSLD
Nickel, sludge, total, dry weight [as Ni]monthly minimumreport only (mg/kg)all yearSLD
Nickel, sludge, total, dry weight [as Ni]monthly averagereport only (mg/kg)all yearSLD
Nickel, sludge, total, dry weight [as Ni]monthly maximum≤ 420 mg/kgall yearSLD
Nitrogen, sludge, total, dry weight [as N]monthly minimumreport only (mg/kg)all yearSLD
Nitrogen, sludge, total, dry weight [as N]monthly averagereport only (mg/kg)all yearSLD
Nitrogen, sludge, total, dry weight [as N]monthly maximumreport only (mg/kg)all yearSLD
Mercury, sludge, total, dry weight [as Hg]monthly minimumreport only (mg/kg)all yearSLD
Mercury, sludge, total, dry weight [as Hg]monthly averagereport only (mg/kg)all yearSLD
Mercury, sludge, total, dry weight [as Hg]monthly maximum≤ 57 mg/kgall yearSLD
Potassium, sludge, total, dry weight [as K]monthly minimumreport only (mg/kg)all yearSLD
Potassium, sludge, total, dry weight [as K]monthly averagereport only (mg/kg)all yearSLD
Potassium, sludge, total, dry weight [as K]monthly maximumreport only (mg/kg)all yearSLD
Phosphorus, sludge, total, dry weight [as P]monthly minimumreport only (mg/kg)all yearSLD
Phosphorus, sludge, total, dry weight [as P]monthly averagereport only (mg/kg)all yearSLD
Phosphorus, sludge, total, dry weight [as P]monthly maximumreport only (mg/kg)all yearSLD

How strict are these limits?

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

Same industry: the 9 Membership Organizations permits in Michigan.

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/MI0057704 · MCP: https://passage-data.com/mcp