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OMYA Inc

Industrial or other facility, Pittsford, Vermont. NPDES permit VT0001155 expired Jun 30, 2019; its limits still apply. Last 12 months: over a limit once (last December 2025), 10 required values missing, 12 of 22 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 15 days after each period: outfall 001 form A monthly (5 values), outfall 002 form A monthly (5 values)
Last report on file: July 2026
Oct 2024 – Sep 2025: 0 values over a limit, 0 required values missing, 12 of 24 reports late

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

Period ending	Parameter	Reported	Limit
December 2025	Turbidity, daily maximum	27	≤ 25 NTU

Limits in force (10)

Parameter	Statistic	Limit	Months	Outfall
Turbidity	daily maximum	≤ 25 NTU	all year	001
pH	minimum	≥ 6.5 SU	all year	001
pH	maximum	≤ 8.5 SU	all year	001
Solids, total suspended	daily maximum	≤ 25 mg/L	all year	001
Flow, in conduit or thru treatment plant	monthly average	≤ .8 MGD	all year	001
Turbidity	daily maximum	≤ 25 NTU	all year	002
pH	minimum	≥ 6.5 SU	all year	002
pH	maximum	≤ 8.5 SU	all year	002
Solids, total suspended	daily maximum	≤ 25 mg/L	all year	002
Flow, in conduit or thru treatment plant	monthly average	≤ .8 MGD	all year	002

How strict are these limits?

Turbidity, daily maximum 25 NTU — stricter than 81% of 298 other minor industrial and other permits nationwide; 5% have the same limit
Solids, total suspended, daily maximum 25 mg/L — stricter than 33% of 24 other minor industrial and other permits in Vermont

Cited limits by parameter: Vermont'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/VT0001155 · MCP: https://passage-data.com/mcp