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Southwater Inc

Water Supply, Tamms, Illinois. NPDES permit IL0072788, in force until Apr 30, 2030. Last 12 months: over a limit 3 times (last September 2026), 17 required values missing, 10 of 24 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: outfall 001 form 0 monthly (17 values), outfall 002 form 0 monthly (16 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 2 of 24 reports late

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

Period endingParameterReportedLimitOver by
May 2026Chlorine, total residual, daily maximum.06 mg/L≤ .05 mg/L20%
September 2026BOD, 5-day, 20 deg. C, 30-day average42.1 mg/L≤ 10 mg/L321%
September 2026BOD, 5-day, 20 deg. C, daily maximum42.1 mg/L≤ 20 mg/L111%

Limits in force (36)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]monthly average minimumreport only (mg/L)all year001
Oxygen, dissolved [DO]minimum weekly averagereport only (mg/L)all year001
Oxygen, dissolved [DO]daily minimumreport only (mg/L)all year001
pHmonthly minimum≥ 6.5 SUall year001
pHmonthly maximum≤ 9 SUall year001
Solids, total suspended30-day average≤ 15 mg/Lall year001
Solids, total suspendeddaily maximum≤ 30 mg/Lall year001
Solids, total suspended30-day average≤ 4.75 lb/dall year001
Solids, total suspendeddaily maximum≤ 9.5 lb/dall year001
Chloride [as Cl]daily maximumreport only (mg/L)all year001
Iron, total [as Fe]30-day average≤ 2 mg/Lall year001
Iron, total [as Fe]daily maximum≤ 4 mg/Lall year001
Iron, total [as Fe]30-day average≤ .63 lb/dall year001
Iron, total [as Fe]daily maximum≤ 1.26 lb/dall 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
Chlorine, total residualdaily maximum≤ .05 mg/Lall year001
Oxygen, dissolved [DO]monthly average minimumreport only (mg/L)Jan, Jul002
Oxygen, dissolved [DO]minimum weekly averagereport only (mg/L)Jan, Jul002
Oxygen, dissolved [DO]daily minimumreport only (mg/L)Jan, Jul002
BOD, 5-day, 20 deg. C30-day average≤ 10 mg/Lall year002
BOD, 5-day, 20 deg. Cdaily maximum≤ 20 mg/Lall year002
BOD, 5-day, 20 deg. C30-day average≤ .03 lb/dall year002
BOD, 5-day, 20 deg. Cdaily maximum≤ .07 lb/dall year002
pHmonthly minimum≥ 6.5 SUall year002
pHmonthly maximum≤ 9 SUall year002
Solids, total suspended30-day average≤ 12 mg/Lall year002
Solids, total suspendeddaily maximum≤ 12 mg/Lall year002
Solids, total suspended30-day average≤ .04 lb/dall year002
Solids, total suspendeddaily maximum≤ .08 lb/dall year002
Nitrogen, ammonia total [as N]30-day averagereport only (mg/L)all year002
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year002
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year002
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year002
Chlorine, total residualdaily maximum≤ .05 mg/Lall year002
Coliform, fecal generaldaily maximumreport only (#/100mL)all year002

How strict are these limits?

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

Same industry: the 30 Water Supply permits in Illinois.

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

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Your permit document is the final word. As JSON: /api/v1/permits/IL0072788 · MCP: https://passage-data.com/mcp