USDOI NPS - GRAND CANYON NP - SOUTH RIM WWTP
NPDES ID: AZ0022152
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
This quarter: 4 effluent violations.
Violations
June 30, 2026
Nitrogen, ammonia total [as N]
209% over limit
Discharged 6170000 mg/L against a permitted limit of 2000000 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
517% over limit
Discharged 6170000 mg/L against a permitted limit of 1000000 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Nitrogen, ammonia total [as N]
685% over limit
Discharged 7850000 mg/L against a permitted limit of 1000000 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
293% over limit
Discharged 7850000 mg/L against a permitted limit of 2000000 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (4 months ago)
Last confirmed
August 16, 2026 (39 minutes ago)