EPA v. Granite Canyon Quarry

Case summary

The maximum contaminant level (MCL) for nitrate is 10 milligrams per liter (mg/L), with compliance to be based on the average of an initial and a confirmation. The initial sample, taken atSS02/SP02 on May 22, 2024, was 19.8 mg/L, and the confirmation sample, taken at the same location on June 3, 2024, was 2 mg/L. The average of the initial sample and the confirmation sample is 10.9 mg/L, and therefore, Respondent violated the nitrate MCL.

Defendants (1)

• Martin Marietta Materials, Inc.Named in complaintNamed in settlement

Facilities (1)

• GRANITE CANYON QUARRY

  WY

  Registry ID: 110050795804

Statutes cited

• SDWA 1412/1414 — National Drinking Water Regulations

Enforcement conclusions (1)

• Granite Canyon Quarryentered 2024-06-25

  Primary law: SDWA

Timeline (3 milestones)

• 2024-06-25Final Order Issued
• 2024-10-10Enforcement Action Data Entered
• 2025-10-20Enforcement Action Closed