STATE REPORT CO 1 ALERT 98 HEALTH VIOLATIONS

Colorado Water Quality & Safety Report

46 ZIP codes · 182 water systems · IPC plumbing code · Updated 2026-03-16

Data: EPA SDWIS, NWS, State plumbing boards, Rewiring America Last verified: 2026-03-16

46
ZIP Codes
182
Water Systems
38
ZIPs with Violations
1
Active Alerts
IPC
Plumbing Code
6
Avg Rebate Programs

Overview

We track water quality, weather alerts, plumbing regulations, and energy rebates for 46 ZIP codes across Colorado, covering 182 community water systems that serve approximately 4,498,490 people.

38 of 46 ZIP codes (83%) have recorded EPA violations. 98 health-based violations have been documented.

Active Weather Alerts

1 active alert in Colorado. Severe weather can directly affect tap water quality — flooding, power outages, and infrastructure damage may lead to boil-water advisories.

AlertSeverityAreas
Fire Weather WatchSevereLarimer County Below 6000 Feet/Northwest Weld County; Nor…

View all Colorado alerts →

Plumbing Regulations

Colorado follows the International Plumbing Code (2021 edition).

  • Plumbing code: IPC (2021)
  • Homeowner DIY: Allowed with permit
  • Water heater permit: Required
  • Annual backflow test: Required

Full Colorado regulations →

Energy & Water Rebates

Across 45 tracked ZIP codes in Colorado, residents have access to an average of 6 water-related rebate programs — including incentives for heat pump water heaters, efficient fixtures, and plumbing upgrades.

Check rebates for your ZIP code →

Areas with Most Violations

ZIP CodeCitySafety ScoreViolationsHealth-BasedSystem
80437Evergreen—14836EVERGREEN MD
80477Steamboat Springs—14114MT WERNER WD
80101Agate—1243AGATE WA
81625Craig—1150CRAIG CITY OF
80511Estes Park—1099ESTES PARK TOWN OF
81147Pagosa Springs—680PAGOSA AREA WSD
80030Westminster—672WESTMINSTER CITY OF
81226Florence—601FLORENCE CITY OF
81601Glenwood Springs—440GLENWOOD SPRINGS CITY OF
80521Fort Collins—350FT COLLINS CITY OF

Areas with No Violations

ZIP CodeCitySafety ScoreSystemPopulation
80020Broomfield—BROOMFIELD CITY AND COUNTY OF106,153
80022Commerce City—SOUTH ADAMS COUNTY WSD74,341
80027Louisville—LOUISVILLE CITY OF20,975
80120Littleton—SOUTHWEST METROPOLITAN WSD48,648
81001Pueblo—PUEBLO BOARD OF WW114,070
81101Alamosa—ALAMOSA CITY OF11,271
81501Grand Junction—UTE WCD91,186
81657Vail—EAGLE RIVER WSD51,515

Lead & Copper

  • 0 ZIP codes exceed the EPA lead action level

Radon Risk

  • High risk (Zone 1): 0 ZIP codes (0%)
  • Moderate risk (Zone 2): 0 ZIP codes
  • Low risk (Zone 3): 0 ZIP codes

All 46 ZIP Codes in Colorado

Data Sources

Updated daily.

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