In November 2025, the settlement document lists a monthly average ammonia concentration of 91.96 milligrams per liter at Washington Beef’s Outfall 008. The permit limit was 2.3. The reported value was almost 40 times the ceiling.

That number was part of a broader pattern alleged by EPA Region 10. The agency listed exceedances involving bacteria, ammonia, oil and grease, turbidity, dissolved oxygen, biological oxygen demand, suspended solids and total nitrogen. It also alleged a failure to properly operate and maintain the treatment systems used to comply with the permit.

The case ended with a negotiated penalty. It did not end with Washington Beef admitting the specific factual allegations.

Process wastewater flowed toward the Yakima River

Washington Beef owned or operated the beef processing facility at 201 Elmwood Road in Toppenish. Its Clean Water Act permit authorized process wastewater discharges through two outfalls, subject to specific pollution limits and monitoring requirements.

The permit was issued in December 2009, took effect in February 2010 and expired on paper in January 2015. The EPA agreement says it was administratively extended, meaning its requirements remained applicable during the period covered by the case.

The EPA described Wanity Slough and Spencer Lateral as relatively permanent tributaries connected to the Yakima River. That establishes the regulated pathway. It does not, by itself, establish what ecological or human harm occurred downstream.

Several listed values were many times the permit limit

The agreement contains dozens of reported figures. The comparisons below show several of the largest ratios. Multiples are calculated from the listed reported value and permit limit, then rounded to one decimal place.

The alleged breakdown intensified in 2025

The EPA’s tables identify an E. coli percentage exceedance as early as July 2022 and additional E. coli and oil-and-grease entries in 2024. The broadest cluster, however, appears from May through December 2025, when multiple pollutant categories exceeded different concentration and loading limits.

1. July 2022The earliest listed incident was an E. coli percentage-limit exceedance at Outfall 008.
2. February and March 2024The agreement lists more E. coli percentage exceedances and an oil-and-grease exceedance.
3. May to December 2025EPA tables show overlapping ammonia, turbidity, dissolved oxygen, biological oxygen demand and suspended-solids allegations, mostly at Outfall 008.
4. January 2026The listed exceedances shifted to Outfall 002 for an E. coli percentage result and two ammonia measurements.
5. March 11, 2026An authorized EPA representative conducted a compliance inspection of the facility.
6. September 22, 2026The regional judicial officer ratified the agreement and issued the final order.

What the measurements describe

The agreement is an enforcement document, not a downstream environmental assessment. It identifies which permit boundaries were allegedly crossed, but it does not report sampling from the Yakima River or document specific injuries. The parameters still show the different functions the treatment system was expected to control.

The company accepted the penalty, not the allegations

Washington Beef admitted the jurisdictional allegations, consented to the penalty and waived its right to contest the allegations or appeal the final order. Its position on the underlying facts was expressly preserved in the settlement language.

“Respondent neither admits nor denies the specific factual allegations contained in this Consent Agreement.” Consent Agreement, paragraph 4.2

• The $282,895 penalty was due within 30 days after the final order was filed.
• Late payment could trigger interest, collection costs and a 20 percent quarterly nonpayment penalty.
• The final order settled the EPA’s civil penalty claims for the alleged violations in the agreement.
• The settlement did not eliminate Washington Beef’s continuing duty to comply with the Clean Water Act and its permit.
• The order preserved the government’s ability to pursue appropriate injunctive relief, other equitable relief or criminal sanctions for violations of law.

The missing piece is what changed at the facility

The EPA alleged that Washington Beef failed to properly operate and maintain its treatment and control systems. Yet the agreement does not explain the equipment, operating decisions or failures behind the listed values. It also does not describe a required construction project, treatment upgrade, new monitoring schedule or other specific corrective measure.

That omission matters because a penalty resolves the civil claims in this docket, while the operational question determines whether the same pattern can happen again.

The settlement establishes a substantial financial consequence and leaves the factual allegations formally unresolved. Its most important evidence is the repeated pattern in Washington Beef’s listed discharge values. Its most important unanswered question is whether the treatment system that produced those values was actually fixed.