City of PhiladelphiaThe Litter Index is used to compare the relative cleanliness of different areas of the city of Philadelphia. More recent and comprehensive Litter Index data is available by neighborhood , blocks and surveys ; each will be updated annually going forward. For those conducting analysis using Litter Index data, please be advised that the survey design for this dataset for years between 2007- 2015 is vastly different from the 2017 and on data, so it would not make sense to compare the two. This historic data remains available for reference. View metadata for key information about this dataset. For questions about this dataset, contact cleanphl@phila.gov . For technical assistance, email maps@phila.gov .ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/127d43be1df74b678a9b1c39653396db_0engPHLmapsPublicLitter Index before 2015 [Pennsylvania--Philadelphia]Web servicesPennsylvania--PhiladelphiaPennsylvania2015