characteristicNames

[ldecicco-USGS]

what's the best way to get a human-readable list of WQP characteristicNames?

• I see dataRetrieval::pCodeToName, but it was updated in 2014.
• I see https://www.waterqualitydata.us/public_srsnames/?mimeType=json, which is probably the same as pCodeToName, is that right? It also appears to be NWIS specific, but there are characteristic names available through WQP that aren't listed here, right?
• I see https://www.waterqualitydata.us/services/codes/characteristicname?mimeType=xml, which I expect is more complete, but now I'm confused about why there are two lists - can anybody help me understand?
• is there a dataRetrieval equivalent to the services/codes/characteristicname query?

[ldecicco-USGS]

I updated pCodeToName, going to leave it at that until we get a more specific solution.