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Calgon Carbon Corporation

Industrial Inorganic Chemicals, Bay Saint Louis, Mississippi. NPDES permit MS0046515, in force until Oct 31, 2030. Last 12 months: over a limit 9 times (last July 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due: About 28 days after each period: form A monthly (10 values), form Q quarterly
Last report on file: August 2026
Oct 2024 – Sep 2025: 4 values over a limit, 0 required values missing, 0 of 16 reports late

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

Period ending	Parameter	Reported	Limit	Over by
December 2025	Solids, total suspended, monthly average	35.65 mg/L	≤ 30 mg/L	19%
December 2025	Solids, total suspended, monthly maximum	78 mg/L	≤ 45 mg/L	73%
April 2026	Solids, total suspended, monthly maximum	70.03 mg/L	≤ 45 mg/L	56%
May 2026	Solids, total suspended, monthly average	31.16 mg/L	≤ 30 mg/L	4%
May 2026	Solids, total suspended, monthly maximum	66.92 mg/L	≤ 45 mg/L	49%
June 2026	Solids, total suspended, monthly average	31.39 mg/L	≤ 30 mg/L	5%
June 2026	Solids, total suspended, monthly maximum	54.84 mg/L	≤ 45 mg/L	22%
July 2026	Solids, total suspended, monthly average	32.27 mg/L	≤ 30 mg/L	8%
July 2026	Solids, total suspended, monthly maximum	58.67 mg/L	≤ 45 mg/L	30%

Limits in force (12)

Parameter	Statistic	Limit	Months
Temperature, water deg. fahrenheit	daily maximum	report only (deg F)	all year
pH	minimum	≥ 6 SU	all year
pH	maximum	≤ 9 SU	all year
Solids, total suspended	monthly average	≤ 30 mg/L	all year
Solids, total suspended	monthly maximum	≤ 45 mg/L	all year
Oil & Grease	monthly average	≤ 10 mg/L	all year
Oil & Grease	monthly maximum	≤ 15 mg/L	all year
Nitrogen, ammonia total [as N]	monthly maximum	report only (mg/L)	all year
Sulfite [as SO3]	monthly maximum	≤ 225 mg/L	all year
Temp. diff. between up/down stream deg. F	quarterly maximum	report only (deg F)	all year
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year

How strict are these limits?

Solids, total suspended, monthly maximum 45 mg/L — stricter than 98% of 1,158 other minor industrial and other permits nationwide; 1% have the same limit
Solids, total suspended, monthly average 30 mg/L — stricter than 27% of 62 other minor industrial and other permits in Mississippi; 47% have the same limit
Oil & Grease, monthly average 10 mg/L — stricter than 21% of 37 other minor industrial and other permits in Mississippi; 62% have the same limit

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

Same industry: the 23 Chemicals and Allied Products permits in Mississippi.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MS0046515 · MCP: https://passage-data.com/mcp