| dataRetrieval-package | Retrieval functions for USGS and EPA data |
| constructNWISURL | Construct NWIS url for data retrieval |
| constructWQPURL | Construct WQP url for data retrieval |
| countyCd | US County Code Lookup Table |
| getWebServiceData | Function to return data from web services |
| importRDB1 | Function to return data from the NWIS RDB 1.0 format |
| importWaterML1 | Function to return data from the NWISWeb WaterML1.1 service |
| importWaterML2 | Function to return data from the WaterML2 data |
| importWQP | Basic Water Quality Portal Data parser |
| readNWISdata | General Data Import from NWIS |
| readNWISdv | Daily Value USGS NWIS Data Retrieval |
| readNWISgwl | Groundwater level measurements retrieval from USGS (NWIS) |
| readNWISmeas | Surface-water measurement data retrieval from USGS (NWIS) |
| readNWISpCode | USGS Parameter Data Retrieval |
| readNWISpeak | Peak flow data from USGS (NWIS) |
| readNWISqw | Raw Data Import for USGS NWIS QW Data |
| readNWISrating | Rating table for an active USGS streamgage retrieval |
| readNWISsite | USGS Site File Data Retrieval |
| readNWISuv | Instantaneous value data retrieval from USGS (NWIS) |
| readWQPdata | General Data Import from Water Quality Portal |
| readWQPqw | Raw Data Import for Water Quality Portal |
| renameNWISColumns | renameColumns |
| setAccess | Set data endpoint |
| stateCd | US State Code Lookup Table |
| stateCdLookup | State code look up |
| whatNWISdata | USGS data availability |
| whatNWISsites | Site Data Import from NWIS |
| whatWQPsites | Site Data Import from Water Quality Portal |
| zeroPad | Pad string with leading zeros |