• AWWA JAW46205
Provide PDF Format

Learn More

AWWA JAW46205

  • Journal AWWA - Pennsylvania's Filtration Evaluation Program
  • Journal Article by American Water Works Association, 08/01/1997
  • Publisher: AWWA

$15.00$30.00


Pennsylvania's Department of Environmental Protection (DEP) initiated a statewide filter plant performance evaluation (FPPE) program for safe drinking water and completed 506 FPPEs at 290 surface water treatment plants. Only 39 percent of the plants were rated acceptable for performance at the program's inception in 1988, but by 1996 the percentage had increased to 91 percent -demonstrating that assistance to these systems could lead to successful improvements and decreased risks from waterborne protozoa. The percentage of positive Cryptosporidium (presumptive) samples of the finished water dropped from 35 percent in 1990 to <5 percent in 1996. Positive Cryptosporidium samples have remained below 5 percent in the last five years. The 90th percentile of particle count data showed a postfiltration count of 50/mL in the 3- to 18-um size range as the threshold for acceptable performance. Because optimized performance is a goal of the FPPE program, the concentrations of 3- to 18-um particles should remain below 10/mL to minimize breakthrough of pathogenic protozoa. The DEP considers turbidity of <0.1 ntu from each filter as a more optimum level of filter plant performance. Includes 10 references, table, figures.

Related Products

AWWA WQTC57029

AWWA WQTC57029

LIMS is Not Only for the Laboratory, It's for Clients Too..

$12.00 $24.00

AWWA ACE70831

AWWA ACE70831

Lead (Pb) in Drinking Water and Associated Public Health Risk..

$12.00 $24.00

AWWA ACE56313

AWWA ACE56313

Which Nitrate Removal Technology is Right for You?..

$12.00 $24.00

AWWA CSC94001

AWWA CSC94001

Feed Forward Chlorine Dose Control to Counteract Sudden Ammonia Increase in Water Purification Plan..

$12.00 $24.00