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Ahlstrom Filtration LLC

Paper Mills, Mount Holly Springs, Pennsylvania. NPDES permit PA0008486 expired Jun 30, 2026; its limits still apply. Last 12 months: no values over a limit, 27 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due

About 28 days after each period: outfall 001 form A monthly (27 values), outfall 002 form S twice a year, outfall 003 form S twice a year, outfall 005 form S twice a year, outfall 006 form S twice a year, outfall 007 form S twice a year, and 1 more form

Last report on file

June 2026

Oct 2024 – Sep 2025

0 values over a limit, 0 required values missing, 1 of 24 reports late

Limits in force (49)

How strict are these limits?

• BOD, carbonaceous [5 day, 20 C], monthly average 18 mg/L — stricter than 71% of 1,179 other minor industrial and other permits in Pennsylvania
• Solids, total suspended, daily maximum 60 mg/L — stricter than 65% of 1,102 other minor industrial and other permits in Pennsylvania; 23% have the same limit
• BOD, carbonaceous [5 day, 20 C], daily maximum 36 mg/L — stricter than 56% of 80 other minor industrial and other permits in Pennsylvania

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

Same industry: the 21 Paper and Allied Products permits in Pennsylvania.

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/PA0008486 · MCP: https://passage-data.com/mcp