OMYA Inc

NPDES permit VT0020770 · Minor NON-POTW · expired, expires 2023-09-30 · EPA's file as of 2026-09-19

This permit expired on 2023-09-30 and is expired: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

EPA's record, 2025-09-01 to 2026-08-31

0values over a limit

0required values missing, on 0 form(s)

12of 22 forms filed late

Last period with anything received: 2026-07-31.

Reports are due about 15 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Outfall 001, form A ((this discharge was formerly 3-1124 OMYA East facility) calcium carbonate processing wastewater an): every 1 month(s), 5 values
Outfall 002, form A ((this discharge was formerly the 001 discharge of 3-0395) calcium carbonate processing wastewater.): every 1 month(s), 5 values

Outfall	Parameter	Statistic	Limit	Months
001	pH	MINIMUM	>= 6.5 SU	all year
001	pH	MAXIMUM	<= 8.5 SU	all year
001	Solids, total suspended	DAILY MX	<= 17 mg/L	all year
001	Flow, in conduit or thru treatment plant	DAILY MX	<= .3 MGD	all year
001	Turbidity, lab, NTU	DAILY MX	<= 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 MX	<= 10 mg/L	all year
002	Flow, in conduit or thru treatment plant	DAILY MX	<= .35 MGD	all year
002	Turbidity, lab, NTU	DAILY MX	<= 10 NTU	all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states