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ZIP Code 20646 Water Quality
Maryland · 106,716 people served · 20 water systems
B
GoodZIP code 20646 is in Maryland and is a mid-sized community from a drinking-water-service perspective, with 106,716 people served by 20 EPA-registered public water systems. It corresponds to LA PLATA.
Within ZIP code 20646, the EPA Safe Drinking Water Information System (SDWIS) records 1 health-based violation during the past five years across 20 water systems serving this postal area. The grade of B reflects the aggregate compliance pattern, not the current daily water quality.
Last updated: 2026-05-18 · Source: EPA SDWIS
ZIP Code Location
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Cities in ZIP 20646
Water Systems Serving 20646
TURKEY HILL WATER COMPANY
PWSID: MD0080048
150 served
BRYANS ROAD
PWSID: MD0080033
6,260 served
NEWTOWN VILLAGE
PWSID: MD0080032
170 served
MOUNT CARMEL WOODS
PWSID: MD0080030
175 served
MARIELLEN PARK
PWSID: MD0080028
184 served
AVON CREST
PWSID: MD0080002
79 served
BEANTOWN PARK- WOODLEY ROAD
PWSID: MD0080004
127 served
HUNTERS BROOKE/FALCON RIDGE SUBD
PWSID: MD0080083
614 served
SPRING VALLEY
PWSID: MD0080043
91 served
SWAN POINT
PWSID: MD0080046
945 served
WALDORF - CHARLES COUNTY DPW
PWSID: MD0080049
84,296 served
OAKWOOD
PWSID: MD0080055
45 served
ELLENWOOD
PWSID: MD0080057
229 served
BENEDICT
PWSID: MD0080062
376 served
CHAPEL POINT WDS/ JUDE HOUSE/ COMM CTR
PWSID: MD0080064
280 served
BEL ALTON
PWSID: MD0080005
311 served
CLIFFTON ON THE POTOMAC
PWSID: MD0080009
744 served
TOWN OF LA PLATA
PWSID: MD0080025
11,535 served
GARDEN ESTATES CENTRAL WATER
PWSID: MD0080015
55 served
PARKWAY SUBDIVISION WATER COMPANY
PWSID: MD0080035
50 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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