Water-Level Source Codes
# National Water Information System
# Date Retrieved: USGS Water Data for the Nation Help System
A "Reported by another government agency (do not use ""A"" if reported by owner, use ""O"")."
D From driller's log or report.
G Private geologist-consultant or university associate.
L Depth interpreted from geophysical logs by personnel of source agency.
M Memory (owner, operator, driller).
O Reported by owner of well.
R Reported by person other than the owner, driller, or another government agency.
S Measured by personnel of reporting agency.
U Source is unknown.
Z Other source (explain in remarks).