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Entegris, Inc

Plastics Products, Billerica, Massachusetts. NPDES permit MA0040339 expired Feb 28, 2021; its limits still apply. Last 12 months: no values over a limit, 3 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (11 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 1 of 12 reports late

Limits in force (13)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year
pHminimum≥ 6.5 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendeddaily maximum≤ 45 mg/Lall year
Nitrogen, ammonia total [as N]monthly averagereport only (ug/L)all year
Nitrogen, ammonia total [as N]daily maximumreport only (ug/L)all year
Copper, total [as Cu]monthly averagereport only (ug/L)Feb, May, Aug, Nov
Copper, total [as Cu]daily maximumreport only (ug/L)Feb, May, Aug, Nov
Flow, in conduit or thru treatment plantmonthly average≤ 80000 gal/dall year
Flow, in conduit or thru treatment plantdaily maximum≤ 100000 gal/dall year
Chlorine, total residualmonthly average≤ 1 mg/Lall year
Chlorine, total residualdaily maximum≤ 1 mg/Lall year

How strict are these limits?

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MA0040339 · MCP: https://passage-data.com/mcp