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ZIP Code 20678 Water Quality
Maryland · 13,580 people served · 17 water systems
A
ExcellentZIP code 20678 is in Maryland and is a small city from a drinking-water-service perspective, with 13,580 people served by 17 EPA-registered public water systems. It corresponds to PRINCE FREDERICK.
Within ZIP code 20678, the EPA Safe Drinking Water Information System (SDWIS) records no health-based Maximum Contaminant Level (MCL) exceedances during the past five years across the 17 water systems serving this postal area.
Last updated: 2026-05-18 · Source: EPA SDWIS
ZIP Code Location
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Cities in ZIP 20678
Water Systems Serving 20678
LAKEWOOD
PWSID: MD0040008
203 served
SOLOMONS
PWSID: MD0040027
3,811 served
WALNUT CREEK
PWSID: MD0040035
158 served
MARLEY RUN
PWSID: MD0040053
290 served
CAVALIER COUNTRY
PWSID: MD0040002
381 served
HUNTING HILLS
PWSID: MD0040006
124 served
WHITE SANDS
PWSID: MD0040017
82 served
ST. LEONARD
PWSID: MD0040013
350 served
KENWOOD BEACH
PWSID: MD0040007
338 served
PRINCE FREDERICK
PWSID: MD0040011
4,371 served
TARA SUBDIVISION
PWSID: MD0040034
68 served
SUMMIT/HIGHLANDS
PWSID: MD0040026
1,108 served
CROSS POINT SUBDIVISION
PWSID: MD0040052
434 served
TAPESTRY NORTH
PWSID: MD0040205
60 served
CHESAPEAKE HEIGHTS (BAYSIDE FOREST)
PWSID: MD0040018
1,190 served
SHORES OF CALVERT
PWSID: MD0040015
361 served
PARIS OAKS / DAYS END
PWSID: MD0040010
251 served
About ZIP-code water data
Postal-code level water quality data is built up from the underlying water systems — multiple ZIPs may share a single utility, and a single ZIP can span multiple utilities. For property-level information, contact the specific utility serving your address. EPA data on this page was last refreshed on 2026-05-18.
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