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Chattanooga Gas Company

Gas Production And/Or Distribution, Chattanooga, Tennessee. NPDES permit TN0057312, in force until Jun 30, 2029. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form G monthly (6 values), outfall SW1 form B twice a year, outfall SW2 form B twice a year
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 1 of 16 reports late

Limits in force (18)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigradedaily maximumreport only (deg C)all year001
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall 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≤ .02 mg/Lall year001
pHminimum≥ 6 SU (alert, not enforceable)all yearSW1
pHmaximum≤ 9 SU (alert, not enforceable)all yearSW1
Solids, total suspendeddaily maximum≤ 150 mg/L (alert, not enforceable)all yearSW1
Oil and greasedaily maximum≤ 15 mg/L (alert, not enforceable)all yearSW1
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearSW1
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearSW1
pHminimum≥ 6 SU (alert, not enforceable)all yearSW2
pHmaximum≤ 9 SU (alert, not enforceable)all yearSW2
Solids, total suspendeddaily maximum≤ 150 mg/L (alert, not enforceable)all yearSW2
Oil and greasedaily maximum≤ 15 mg/L (alert, not enforceable)all yearSW2
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearSW2
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearSW2

How strict are these limits?

Cited limits by parameter: Tennessee'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/TN0057312 · MCP: https://passage-data.com/mcp