A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Crypto and Giardia in US groundwater
Groundwater systems need to be carefully monitored until contamination levels and acceptable risk factors are determined.
Data generated from the detection of Cryptosporidium oocysts and Giardia cysts in 463 groundwater samples were compiled. Samples were taken from 199 sites in 23 of the 48 contiguous states. The groundwater sources were vertical wells, springs, infiltration galleries, and horizontal wells. Samples were analyzed using an immunofluorescence technique. Inclusion of data from all sources showed that 12 percent of the sites were positive for Cryptosporidium or Giardia or both. Cryptosporidium oocysts were found in 5 percent of the vertical wells, 20 percent of the springs, 50 percent of the infiltration galleries, and 45 percent of the horizontal wells. Giardia cysts were found in 1 percent of the vertical wells, 14 percent of the springs, 25 percent of the infiltration galleries, and 36 percent of the horizontal wells. These data suggest that springs are at a higher risk for contamination than vertical wells. Because pathogens occur frequently in infiltration galleries and horizontal wells, these sources warrant further study.
Crypto and Giardia in US groundwater
Groundwater systems need to be carefully monitored until contamination levels and acceptable risk factors are determined.
Data generated from the detection of Cryptosporidium oocysts and Giardia cysts in 463 groundwater samples were compiled. Samples were taken from 199 sites in 23 of the 48 contiguous states. The groundwater sources were vertical wells, springs, infiltration galleries, and horizontal wells. Samples were analyzed using an immunofluorescence technique. Inclusion of data from all sources showed that 12 percent of the sites were positive for Cryptosporidium or Giardia or both. Cryptosporidium oocysts were found in 5 percent of the vertical wells, 20 percent of the springs, 50 percent of the infiltration galleries, and 45 percent of the horizontal wells. Giardia cysts were found in 1 percent of the vertical wells, 14 percent of the springs, 25 percent of the infiltration galleries, and 36 percent of the horizontal wells. These data suggest that springs are at a higher risk for contamination than vertical wells. Because pathogens occur frequently in infiltration galleries and horizontal wells, these sources warrant further study.
Crypto and Giardia in US groundwater
Hancock, Carrie M. (author) / Rose, Joan B. (author) / Callahan, Michael (author)
Journal ‐ American Water Works Association ; 90 ; 58-61
1998-03-01
4 pages
Article (Journal)
Electronic Resource
English
Giardia , Springs , Wells , Water Contamination , Cryptosporidium , Well Water , Groundwater , Analysis
Effect of rainfall on Giardia and crypto
| Wiley | 1998
Effect of rainfall on Giardia and crypto
| Wiley | 1998
Giardia and Cryptosporidium occurrence in groundwater
| Wiley | 2000
| Wiley | 2021
Correlation of Cryptosporidium and Giardia Occurrence in Groundwater With Surface Water Indicators
| British Library Conference Proceedings | 1998