Description: Tracing work was done on the 1:24,000 NHHD linework in January 2022 to identify waters within 20-miles of a active Public Water Supply surface water intake. Such waters are covered by Env-Wq 1703.22(l) with states (March 2022);"(l) The letter “l” shall indicate that there is a more stringent drinking water maximum contaminant level (MCL) specified in Env-Dw 700, so if the surface water is a source for a public water system as defined in RSA 485:1-a, XV or is within 20 miles upstream of any active surface water intake for a public water system, the department shall use the MCL values shown in table 1703-2A, below, for the water and fish ingestion human health criteria:"Active PWS SW intakes were identified with extensive assistance by the NHDES DW bureau staff.