LITTLE ROCK ZOOLOGICAL GARDENS
NPDES ID: AR0037745
X — SNC: Effluent violation (non-monthly average limit)
The facility discharged more of a pollutant than its permit allows, measured over a period other than a monthly average.
This quarter: 1 effluent violation.
Violations
April 30, 2026
Oxygen, dissolved [DO]
5% over limit
Discharged 5.69 mg/L against a permitted limit of 6 mg/L (INST MIN)
DMR, Limited - Numeric Violation
March 31, 2026
Chlorine, total residual
355% over limit
Discharged 0.05 mg/L against a permitted limit of 0.011 mg/L (INST MAX)
DMR, Limited - Numeric Violation
Chlorine, total residual
173% over limit
Discharged 0.03 mg/L against a permitted limit of 0.011 mg/L (INST MAX)
DMR, Limited - Numeric Violation
December 31, 2025
Chlorine, total residual
355% over limit
Discharged 0.05 mg/L against a permitted limit of 0.011 mg/L (INST MAX)
DMR, Limited - Numeric Violation
Chlorine, total residual
3173% over limit
Discharged 0.36 mg/L against a permitted limit of 0.011 mg/L (INST MAX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)