Water Quality in Twisp, WA (98856)
EPA violation data for public water systems serving ZIP code 98856.
No Health-Based Violations
None of the 17 water systems serving this ZIP have exceeded federal contaminant limits in the past 5 years. There are13 monitoring/reporting violations (missed testing deadlines), all resolved.
Better than 72% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
2,920
Population
17
Water Systems
13
Violations (5yr)
0
Health-Based
Location
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Water Systems Serving This Area (17)
Twisp Town Of
All resolvedSun Mountain Resort
All resolvedLoup Loup Ski Area
All resolvedRiverbend Rv Park
Methow Valley Middle School
Loup Loup & Jr Campgrounds
Blackpine Lake Campground
Poplar Flat Campground
Paradise Valley Campground Resort
Casia Lodge & Ranch
All resolvedWar Creek Campground
Methow Valley United Methodist
Cascade Services Subdivision
Jr Campground
Hidden Campground
Hidden Campground
Campbell Short Plat
Contaminants Found
At high levels, nitrate can cause blue baby syndrome in infants.
Missed testing deadlines — not a detection of bacteria.
How Does This Compare?
Twisp (98856) has more violations than 72% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 13, most of which are monitoring/reporting issues.
Water Filter Recommendations
No contaminant issues detected. For general protection, a basic carbon filter removes common impurities like chlorine and sediment. Look for NSF/ANSI 42 certified products.