Ariz. Admin. Code § 18-11-119
Current through Register Vol. 31, No. 2, January 10, 2025
Where the concentration of a pollutant exceeds a water quality standard and the exceedance is not caused by human activity but is due solely to naturally-occurring conditions, the exceedance shall not be considered a violation of the water quality standard.
Ariz. Admin. Code § R18-11-119