Passage Data · Check a report · Use it from your AI

Advanced Heat Treat Corporation

Metal Heat Treating, Waterloo, Iowa. NPDES permit IA0075451, in force until Jan 31, 2031. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 15 days after each period: form A monthly (2 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 (5)

Parameter	Statistic	Limit	Months
Temperature, water deg. fahrenheit	30-day average	≤ 73.8 deg F	Jan
Temperature, water deg. fahrenheit	30-day average	report only (deg F)	Aug
Temperature, water deg. fahrenheit	30-day average	≤ 74.6 deg F	Dec
pH	daily minimum	≥ 6.5 SU	all year
pH	daily maximum	≤ 9 SU	all year

How strict are these limits?

pH, daily minimum at least 6.5 SU — stricter than 60% of 423 other minor industrial and other permits in Iowa; 39% have the same limit
Temperature, water deg. fahrenheit, 30-day average 73.8 deg F — stricter than 22% of 22 other minor industrial and other permits in Iowa

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

Same industry: the 7 Primary Metal Industries permits in Iowa.

Check this month's numbers Email me before each report is due

· Save this facility as a site · Superfund sites nearby · Your permits on one board

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IA0075451 · MCP: https://passage-data.com/mcp