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Toyo Tanso USA, Inc.

Carbon And Graphite Products, Troutdale, Oregon. NPDES permit OR0034916 expired Dec 31, 2017; its limits still apply. Last 12 months: no values over a limit, 4 of 12 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: September 2026
Oct 2024 – Sep 2025: 0 values over a limit, 0 required values missing, 7 of 12 reports late

Limits in force (11)

Parameter	Statistic	Limit	Months
Temperature, water deg. centigrade	daily maximum	≤ 25.3 deg C	all year
Temperature, water deg. centigrade	7-day average	≤ 20.4 deg C	all year
pH	daily minimum	≥ 6.5 SU	all year
pH	daily maximum	≤ 9 SU	all year
Chloride [as Cl]	monthly average	≤ 542 mg/L	all year
Chloride [as Cl]	daily maximum	≤ 1088 mg/L	all year
Flow, in conduit or thru treatment plant	7-day average	report only (MGD)	all year
Chlorine, total residual	monthly average	≤ .05 mg/L	all year
Chlorine, total residual	daily maximum	≤ .05 mg/L	all year
Excess thermal load	7-day average	≤ .32 mkcal/day	all year
Solids, total dissolved	daily maximum	≤ 1000 mg/L	all year

How strict are these limits?

Temperature, water deg. centigrade, daily maximum 25.3 deg C — stricter than 87% of 247 other minor industrial and other permits nationwide
Solids, total dissolved, daily maximum 1000 mg/L — stricter than 64% of 362 other minor industrial and other permits nationwide; 4% have the same limit
pH, daily minimum at least 6.5 SU — stricter than 62% of 95 other minor industrial and other permits in Oregon; 37% have the same limit

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

Same industry: the 3 Electronic and Other Electrical Equipment permits in Oregon.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/OR0034916 · MCP: https://passage-data.com/mcp