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Hitachi America LTD

Electron Tubes, Greenville, South Carolina. NPDES permit SC0048411 expired Oct 31, 2019; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 29 days after each period: form 1 monthly (8 values)
Last report on file: September 2026
Oct 2024 – Sep 2025: 0 values over a limit, 0 required values missing, 3 of 12 reports late

Limits in force (8)

Parameter	Statistic	Limit	Months
pH	instantaneous minimum	≥ 6 SU	all year
pH	instantaneous maximum	≤ 8.5 SU	all year
Vinyl chloride	monthly average	≤ .53 mg/L	all year
Vinyl chloride	daily maximum	≤ .773 mg/L	all year
Trichloroethylene	monthly average	≤ .03 mg/L	all year
Trichloroethylene	daily maximum	≤ .044 mg/L	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

How strict are these limits?

Trichloroethylene, daily maximum .044 mg/L — stricter than 34% of 58 other minor industrial and other permits nationwide; 2% have the same limit
Trichloroethylene, monthly average .03 mg/L — stricter than 15% of 45 other minor industrial and other permits nationwide; 9% have the same limit

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

Same industry: the 7 Electronic and Other Electrical Equipment permits in South Carolina.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/SC0048411 · MCP: https://passage-data.com/mcp