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ICIS-AIR WY0000005603700022

ROCK SPRINGS FERTILIZER COMPLEX (SIMPLOT PHOSPHATES), Rock Springs, WY: Clean Air Act compliance record, inspections, violations, penalties

ROCK SPRINGS FERTILIZER COMPLEX (SIMPLOT PHOSPHATES) is on EPA’s ICIS-AIR register at 515 SOUTH HIGHWAY 430, Rock Springs in Sweetwater County, Wyoming: operating status operating, emissions classification major source, current violation status “No Violation Identified”. Sweetwater 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 92 events on file is a stack test dated July 23, 2026.
  • Of its 11 compliance evaluations on file, 10 are a full compliance evaluation.
  • 1 of the 81 stack tests on file is recorded as failed.
  • The register holds 106 air-emissions sources in Sweetwater County, Wyoming.

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

Identity

Facility as filedROCK SPRINGS FERTILIZER COMPLEX (SIMPLOT PHOSPHATES)
ICIS-AIR IDWY0000005603700022
EPA facility registry ID110000600369
Operating statusOperating
Emissions classificationMajor source
Current violation status (HPV field)No Violation Identified
Address515 SOUTH HIGHWAY 430, Rock Springs, WY 82901
CountySweetwater County
In a nonattainment countyYes (EPA Green Book)
Industry (NAICS)Chemical manufacturing (NAICS 3253)
SIC code2819
EPA region08

Programs and pollutants

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

Compliance evaluations

DateWhat EPA recordedAgencyPrograms
June 4, 2026FCE On-SiteStateTitle V Permits
May 13, 2025FCE On-SiteStateTitle V Permits
July 23, 2024PCE On-SiteU.S. EPAMACT Standards (40 CFR Part 63)
April 23, 2024FCE On-SiteStateTitle V Permits
April 26, 2023FCE On-SiteStateTitle V Permits
April 19, 2022FCE On-SiteStateTitle V Permits
April 21, 2021FCE On-SiteStateTitle V Permits
June 30, 2020FCE On-SiteStateTitle V Permits
April 30, 2019FCE On-SiteStateTitle V Permits
April 11, 2018FCE On-SiteStateTitle V Permits
March 7, 2017FCE On-SiteStateTitle V Permits

Violations

What high-priority and federally reportable violations mean.

EPA’s violation history file holds no violation for ICIS-AIR WY0000005603700022 since January 1, 2017.

Enforcement and penalties

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

Informal enforcement

EPA’s informal action file holds no notice or warning for ICIS-AIR WY0000005603700022 since January 1, 2017.

Stack tests

The newest 50 of 81.

DateWhat EPA recordedAgency
July 23, 2026PassState
June 11, 2026PassState
June 11, 2026PassState
June 10, 2026PassState
June 10, 2026PassState
June 9, 2026PassState
June 9, 2026PassState
May 21, 2026PassState
May 21, 2026PassState
May 21, 2026PassState
May 21, 2026PassState
May 20, 2026PassState
May 20, 2026PassState
March 19, 2026PassState
March 18, 2026PassState
June 24, 2025PassState
June 16, 2025PassState
June 16, 2025PassState
May 15, 2025PassState
May 15, 2025PassState
May 15, 2025PassState
May 15, 2025PassState
May 13, 2025PassState
May 13, 2025PassState
May 12, 2025PassState
May 12, 2025PassState
March 26, 2025PassState
March 26, 2025PassState
March 26, 2025PassState
June 18, 2024PassState
June 18, 2024PassState
June 18, 2024PassState
June 18, 2024PassState
April 29, 2024PassState
April 29, 2024PassState
April 18, 2024PassState
April 18, 2024PassState
April 18, 2024PassState
April 18, 2024PassState
April 18, 2024PassState
April 18, 2024PassState
April 15, 2024PassState
April 15, 2024PassState
March 26, 2024PassState
March 26, 2024PassState
March 25, 2024PassState
August 7, 2023PassState
June 7, 2023PassState
April 12, 2023PassState
April 11, 2023PassState

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Free from EPA: Detailed Facility Report, ECHO Notify (registry ID 110000600369).

Other air sources in Wyoming beside ROCK SPRINGS FERTILIZER COMPLEX (SIMPLOT PHOSPHATES)

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