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 99148 Water Quality
Washington · 18,039 people served · 20 water systems
A
ExcellentZIP code 99148 is in Washington and is a small city from a drinking-water-service perspective, with 18,039 people served by 20 EPA-registered public water systems. It corresponds to Loon Lake.
Within ZIP code 99148, the EPA Safe Drinking Water Information System (SDWIS) records no health-based Maximum Contaminant Level (MCL) exceedances during the past five years across the 20 water systems serving this postal area.
Last updated: 2026-05-18 · Source: EPA SDWIS
ZIP Code Location
Loading map...
Cities in ZIP 99148
Water Systems Serving 99148
STEVENS CO PUD - DENISON
PWSID: WA53AB833
60 served
STEVENS CO PUD - ADDY
PWSID: WA5300367
253 served
STEVENS CO PUD - ECHO ESTATES
PWSID: WA5302590
75 served
STEVENS CO PUD - CLAYTON
PWSID: WA5313450
725 served
STEVENS CO PUD - RIVER PARK ESTATES
PWSID: WA5307813
66 served
STEVENS CO PUD - VALLEY
PWSID: WA5305520
550 served
STEVENS CO PUD - RIVERSIDE
PWSID: WA5318290
365 served
SOLAR PINES WATER ASSN
PWSID: WA5339268
36 served
STEVENS CO PUD - JUMP OFF JOE
PWSID: WA5337165
204 served
STEVENS CO PUD - HALFMOON RANCHOS
PWSID: WA5330420
216 served
STEVENS CO PUD - MISSION RIDGE
PWSID: WA5330434
120 served
LOON LAKE ACRES
PWSID: WA5338651
111 served
TIGER TRACTS
PWSID: WA5329801
90 served
STEVENS CO PUD - DOLOMITE
PWSID: WA5329808
60 served
STEVENS CO PUD - LOON LAKE
PWSID: WA5348250
2,487 served
STEVENS CO PUD - SUNCREST
PWSID: WA5385202
7,484 served
STEVENS CO PUD - SPOKANE LAKE PARK
PWSID: WA5383034
532 served
STEVENS CO PUD - WAITTS LAKE
PWSID: WA5391130
1,216 served
STEVENS CO PUD - WEST SHORE
PWSID: WA5395450
505 served
STEVENS CO PUD - DEER LAKE
PWSID: WA5393380
2,884 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
