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Messer LLC

Industrial Gases, Braddock, Pennsylvania. NPDES permit PA0217387, in force until Apr 30, 2030. Last 12 months: over a limit once (last February 2026), 7 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 28 days after each period: form A monthly (7 values)
Last report on file: June 2026
Oct 2024 – Sep 2025: 0 values over a limit, 0 required values missing, 0 of 12 reports late

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

Period ending	Parameter	Reported	Limit	Over by
February 2026	Chlorine, total residual, monthly average	.63 mg/L	≤ .5 mg/L	26%

Limits in force (7)

Parameter	Statistic	Limit	Months
Temperature, water deg. fahrenheit	instantaneous maximum	≤ 110 deg F	all year
pH	instantaneous minimum	≥ 6 SU	all year
pH	instantaneous maximum	≤ 9 SU	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
Chlorine, total residual	monthly average	≤ .5 mg/L	all year
Chlorine, total residual	instantaneous maximum	≤ 1.17 mg/L	all year

How strict are these limits?

Chlorine, total residual, instantaneous maximum 1.17 mg/L — stricter than 55% of 1,051 other minor industrial and other permits in Pennsylvania; 1% have the same limit

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

Same industry: the 66 Chemicals and Allied Products permits in Pennsylvania.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/PA0217387 · MCP: https://passage-data.com/mcp