Clean Air Act stationary source · ICIS-AIR OK0000004006900001

US SILICA CO / MILL CREEK SOUTH PLANT MILL PLANT 37, Mill Creek, OK: Clean Air Act compliance record, inspections, violations, penalties

Name: US SILICA CO / MILL CREEK SOUTH PLANT MILL PLANT 37, ICIS-AIR OK0000004006900001: Clean Air Act stationary source record
Creator: Velarion Records
License: https://www.usa.gov/government-works

OperatingOperating status
Synthetic minor sourceEmissions classification
No Violation IdentifiedCurrent violation status, as filed
2Compliance evaluations since January 1, 2017
0High-priority violations since January 1, 2017
0Formal enforcement actions since January 1, 2017

US SILICA CO / MILL CREEK SOUTH PLANT MILL PLANT 37, at 1 MILE N ON HWY 7 OF, Mill Creek in Johnston County, Oklahoma, is an operating synthetic minor source of air pollution on EPA’s ICIS-AIR register. EPA’s file records its current violation status (ICIS-AIR’s high-priority violation field) as “No Violation Identified”. The status and classification are as EPA’s facility file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the source’s current standing, quarter by quarter.

Identity

Facility as filed	US SILICA CO / MILL CREEK SOUTH PLANT MILL PLANT 37
ICIS-AIR ID	OK0000004006900001
EPA facility registry ID	110007385579
Operating status	Operating
Emissions classification	Synthetic minor source
Current violation status (ICIS-AIR high-priority violation field)	No Violation Identified
Address	1 MILE N ON HWY 7 OF, Mill Creek, OK 74856
County	Johnston County
In a nonattainment county	No (EPA Green Book)
Industry (NAICS)	Mining and quarrying (NAICS 2123)
SIC code	1446
EPA region	06

Cited to the EPA ICIS-AIR facility file (ECHO download).

Programs and pollutants

Velarion’s copy of EPA’s ICIS-AIR download does not include its program, pollutant and Title V certification files, so this page does not list the Clean Air Act programs US SILICA CO / MILL CREEK SOUTH PLANT MILL PLANT 37 is under or the pollutants it is permitted for. The programs each evaluation and violation below was recorded under are shown with it. EPA’s free Detailed Facility Report lists both.

Compliance evaluations

2Evaluations since January 1, 2017
2Full compliance evaluations

Date	What EPA recorded	Agency	Programs
October 7, 2024	FCE On-Site	State	40 CFR Part 63 Area Sources; New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards
June 24, 2020	FCE Off-Site	State	40 CFR Part 63 Area Sources; New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards

Violations

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

A high-priority violation (HPV) is the most serious class of Clean Air Act non-compliance an agency records; a federally reportable violation (FRV) is the next step down. Each row is one determination as EPA’s violation history files it.

Date	What EPA recorded	Agency	Programs
September 22, 2020	Earliest FRV determination	State	State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards

Enforcement and penalties

0 formal enforcement actions since January 1, 2017, 0 of them with a penalty filed above zero. Each penalty is shown as EPA’s formal action file states it; “Not stated” means the file gives no figure, and $0 is a disclosed zero.

Informal enforcement

Date	What EPA recorded	Agency
December 2, 2021	Notice of Violation	State

Stack tests

0Stack tests since January 1, 2017
0Recorded as failed

EPA’s stack test file holds no test at ICIS-AIR OK0000004006900001 since January 1, 2017.

Cited to the EPA ICIS-AIR evaluation, violation, stack test and enforcement files (ECHO download), events dated January 1, 2017 or later as loaded; up to 50 rows of each shown, newest first.

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How we handle your data → Privacy

EPA publishes a free Detailed Facility Report for every source on ECHO: its compliance status quarter by quarter, its evaluations, and its violations, enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter EPA facility registry ID 110007385579 there.

Nearby on the register

Figures from EPA’s ICIS-AIR download, loaded September 14, 2026.

The Velarion Records public-records register page covers the Clean Air Act stationary source record for US SILICA CO / MILL CREEK SOUTH PLANT MILL PLANT 37 in Mill Creek, OK. The page lists 2 Compliance evaluations since January 1, 2017, 0 High-priority violations since January 1, 2017, and 0 Formal enforcement actions since January 1, 2017.