The current implementation of get_reference_table always returns the entire collection of items, while a user may only require a few items. The API provides many filtering options, e.g. id:
https://api.waterdata.usgs.gov/ogcapi/v0/collections/parameter-codes/items?f=json&lang=en-US&limit=10000&skipGeometry=false&offset=0&id=00065%2C00010