Apr 15, 2026 · 7 min read
PFAS "Forever Chemicals" in US Drinking Water: 2026 Update
PFAS contamination affects an estimated 200 million Americans. Here's what the latest EPA enforcement means for your tap water.
ZIP Code 20602 Water Quality
Maryland · 3,257 people served · 17 water systems
A
ExcellentZIP code 20602 is in Maryland and is a small town from a drinking-water-service perspective, with 3,257 people served by 17 EPA-registered public water systems. It corresponds to WALDORF.
Within ZIP code 20602, 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
Loading map...
Cities in ZIP 20602
Water Systems Serving 20602
THUNDERBIRD APARTMENTS
PWSID: MD1080029
40 served
PINE HILL WATER COMPANY
PWSID: MD0080036
140 served
OAK HILL WATER COMPANY, LLC
PWSID: MD0080034
180 served
MOUNT PLEASANT WATER CO., INC.
PWSID: MD0180009
150 served
POMONKEY WATER COMPANY - FORD HEIGHTS
PWSID: MD0080012
125 served
HAWTHORNE WATER SUPPLY, INC
PWSID: MD0080018
60 served
KINGS MANOR - WHITE PLAINS WATER CO, INC
PWSID: MD0080024
372 served
NEWTOWN ESTATES - TIP HILL WATER CO.
PWSID: MD0080031
110 served
WESTERN SHORES
PWSID: MD0040016
200 served
CALVERT BEACH / FOREST TRAIL
PWSID: MD0040020
100 served
CALVERT BEACH - DECATUR STREET
PWSID: MD0040024
350 served
POMUNK WATER COMPANY DISTRIBUTION SYSTEM
PWSID: MD0080084
340 served
POMFRET ESTATES - UTILCO, INC.
PWSID: MD0080037
150 served
RED HILL WATER COMPANY, INC.
PWSID: MD0080040
200 served
WEST WHITE PLAINS
PWSID: MD0080051
50 served
CHARLES COUNTY GARDENS WATER
PWSID: MD0080008
551 served
TRIMAC WATER COMPANY - FOREST PARK
PWSID: MD0080013
139 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.
From the Blog
Photo by Bluewater Sweden on Unsplash
Mar 22, 2026 · 6 min read
How to Read Your Annual Water Quality Report (CCR)
Your water utility is legally required to send you a Consumer Confidence Report every year. Here's how to actually understand it.
Photo by Louis Hansel on Unsplash
Mar 5, 2026 · 9 min read
Lead in Tap Water: The Complete 2026 Guide
Lead enters drinking water through old pipes and fixtures. Here's how to identify your risk and what to do about it.
Photo by Eduardo Casajús Gorostiaga on Unsplash
Feb 18, 2026 · 5 min read
What Is an EPA Maximum Contaminant Level (MCL)?
MCLs are the foundation of US drinking water safety. Here's how they're set and what they mean for your tap.
Photo by Naja Bertolt Jensen on Unsplash
