41MAINTENANCE
substance 
Reduction
Average 
Inuent 
Challenge
NSF specied 
Challenge 
Concentration
Avg % 
Reduction
Average 
Product Water 
Concentration
Max 
Permissible 
Product Water 
Concentration
NSF 
Reduction 
Requirements
Atenolol 240 ng/L 200 ± 40% ng/L > 95.50% 10.80 ng/L 30 ng/L NA
Carbamazepine 1600 ng/L 1400 ± 40% ng/L 98.40% 25.60 ng/L 200 ng/L NA
DEET 1600 ng/L 1400 ± 40% ng/L 97.10% 46.40 ng/L 200 ng/L NA
Trimethoprim 170 ng/L 140 ± 40% ng/L >96.80% 5.44 ng/L 20 ng/L NA
Linuron 160 ng/L 140 ± 40% ng/L >96.60% 5.44 ng/L 20 ng/L NA
Phenytoin 200 ng/L 200 ± 40% ng/L >94.80% 10.40 ng/L 30 ng/L NA
Ibuprofen 400 ng/L 400 ± 40% ng/L >94.50% 22.00 ng/L 60 ng/L NA
Naproxen 140 ng/L 140 ± 40% ng/L >96.10% 5.46 ng/L 20 ng/L NA
Estrone 120 ng/L 140 ± 40% ng/L >96.10% 4.68 ng/L 20 ng/L NA
Bisphenol A 2000 ng/L 2000 ± 40% ng/L >98.90% 22.00 ng/L 300 ng/L NA
Nonyl Phenol 1600 ng/L 1400 ± 40% ng/L >97.10% 46.40 ng/L 200 ng/L NA
 • Based on the use of Cryptosporidium parvum oocysts.