ICIS-AIR WI0000005502500097

HYDRITE CHEMICAL CO., Cottage Grove, WI: Clean Air Act compliance record, inspections, violations, penalties

OperatingOperating status
Major sourceEmissions classification
Addressed-StateCurrent violation status, as filed
8Compliance evaluations since January 1, 2017
0High-priority violations since January 1, 2017
1Formal enforcement actions since January 1, 2017

HYDRITE CHEMICAL CO. is on EPA’s ICIS-AIR register at 114 N MAIN ST, Cottage Grove in Dane County, Wisconsin: operating status operating, emissions classification major source, current violation status “Addressed-State”. Dane County is on EPA’s Green Book list of areas that do not meet a national air quality standard.

What stands out

The newest of the 28 events on file is a compliance evaluation dated September 8, 2026.
Its events on file run from April 6, 2017 through September 8, 2026.
Of the 1 formal enforcement action on file, 1 carries a filed penalty above zero. The largest on file is $480,500, filed January 22, 2021.
Of its 8 compliance evaluations on file, 6 are a full compliance evaluation.
2 of the 18 stack tests on file are recorded as failed.
The register holds 45 air-emissions sources in Dane County, Wisconsin.

Every line is computed by formula from the record’s stored figures; nothing is estimated.

Identity

Facility as filed	HYDRITE CHEMICAL CO.
ICIS-AIR ID	WI0000005502500097
EPA facility registry ID	110000419609
Operating status	Operating
Emissions classification	Major source
Current violation status (HPV field)	Addressed-State
Address	114 N MAIN ST, Cottage Grove, WI 535279701
County	Dane County
In a nonattainment county	Yes (EPA Green Book)
Industry (NAICS)	Chemical manufacturing (NAICS 3251)
SIC code	2869
EPA region	05

Programs and pollutants

The program, pollutant and Title V files are not loaded: what this page covers.

Compliance evaluations

8Evaluations since January 1, 2017
6Full compliance evaluations

Date	What EPA recorded	Agency	Programs
September 8, 2026	FCE On-Site	State	Title V Permits
June 23, 2025	FCE On-Site	State	Title V Permits
August 30, 2023	FCE On-Site	State	Title V Permits
June 29, 2022	FCE On-Site	State	Title V Permits
June 15, 2020	FCE On-Site	State	Title V Permits
March 19, 2019	PCE On-Site	U.S. EPA	MACT Standards (40 CFR Part 63)
June 20, 2018	FCE On-Site	State	Title V Permits
April 6, 2017	PCE On-Site	U.S. EPA	MACT Standards (40 CFR Part 63); New Source Performance Standards; Operating Permits

Violations

0Violation determinations since January 1, 2017
0Of them high-priority

What high-priority and federally reportable violations mean.

EPA’s violation history file holds no violation for ICIS-AIR WI0000005502500097 since January 1, 2017.

Enforcement and penalties

1 of the formal enforcement actions carry a penalty filed above zero. How a penalty is shown.

Date	What EPA recorded	Agency	Penalty, as filed
January 22, 2021	Civil Judicial Action	U.S. EPA	$480,500

Informal enforcement

Date	What EPA recorded	Agency
June 30, 2017	Notice of Violation	U.S. EPA

Stack tests

18Stack tests since January 1, 2017
2Recorded as failed

Date	What EPA recorded	Agency
June 24, 2026	N/A	State
April 28, 2026	Pass	State
September 18, 2024	Pass	State
April 23, 2024	Pass	State
February 20, 2024	Pass	State
August 9, 2023	Fail	State
July 7, 2022	Pass	State
February 4, 2022	Pass	State
December 14, 2021	Pass	State
May 13, 2021	Pass	State
April 29, 2020	Pass	State
November 22, 2019	Pass	State
September 24, 2019	Pass	State
March 12, 2019	Pass	State
October 16, 2018	Fail	State
February 14, 2018	Pass	State
September 27, 2017	Pass	State
July 20, 2017	Pass	State

Watch HYDRITE CHEMICAL CO.

Privacy

Free from EPA: Detailed Facility Report, ECHO Notify (registry ID 110000419609).

Other air sources in Wisconsin beside HYDRITE CHEMICAL CO.

EPA ICIS-AIR download, loaded September 14, 2026.