STATE REPORT AZ 337 HEALTH VIOLATIONS

Arizona Home Safety Profiles by ZIP

553 ZIP codes · 282 water systems · UPC plumbing code · Updated

Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData, NWS, State plumbing boards, Rewiring America

ZipCheckup tracks drinking-water and home-safety data for 553 ZIP codes across Arizona, covering 282 public water systems that serve about 6,445,396 people. 288 ZIP codes carry at least one EPA violation on record.

553
ZIP Codes
282
Water Systems
288
ZIPs with Violations
UPC
Plumbing Code
5
Avg Rebate Programs
C · 66
Avg Safety Score
2
ZIPs Exceeding Lead Limit
#39
of 50 States
47%
ZIPs Rated A or B
97%
ZIPs with Violations
C
Arizona average: 66/100 - ranked #39 of 50 states. 7 points below the national average (73). 97% of ZIP codes have recorded violations.

Arizona water systems post below-average compliance metrics across multiple counties.

Score Distribution

How Arizona's 553 ZIP codes are distributed across safety grades.

0
A
111
B
90
C
37
D
0
F
85-10070-8455-6940-540-39

Home Safety Scores by State

Loading map…
F (0-39) D (40-54) C (55-69) B (70-84) A (85+)

Model 4.0.0 inputs: EPA SDWIS, UCMR5 PFAS, EPA radon zones, annual county AQI •

Top 10 Safest ZIP Codes in Arizona

Highest Home Safety Scores in the state.

#ZIP CodeCityCountyScoreGrade
1 86403 Lake Havasu CityMohave 82 B
2 86335 RimrockYavapai 81 B
3 86322 Camp VerdeYavapai 80 B
4 86406 Lake Havasu CityMohave 80 B
5 85344 ParkerLa Paz 78 B
6 85643 WillcoxCochise 78 B
7 85924 ConchoApache 78 B
8 85936 Saint JohnsApache 78 B
9 86040 PageCoconino 78 B
10 86324 ClarkdaleYavapai 78 B

10 Lowest-Scoring ZIP Codes in Arizona

#ZIP CodeCityCountyScoreGradeViolations
1 85742 TucsonPima 42 D 101
2 85741 TucsonPima 42 D 109
3 85705 TucsonPima 42 D 109
4 85653 MaranaPima 42 D 103
5 85340 Litchfield ParkMaricopa 42 D 79
6 85298 GilbertMaricopa 42 D 278
7 85297 GilbertMaricopa 42 D 174
8 85296 GilbertMaricopa 42 D 182
9 85295 GilbertMaricopa 42 D 174
10 85236 HigleyMaricopa 42 D 174

County Rankings

Water quality breakdown by county. 15 counties with data in Arizona.

Loading county map…
F (0-39) D (40-54) C (55-69) B (70-84) A (85+)

County-level aggregation of measured ZIP Home Safety Scores • EPA SDWIS, UCMR 5 PFAS, EPA radon zones, EPA AirData

CountyAvg ScoreGradeZIPsBest ZIPWorst ZIP
04013 66 C 199 85363 (75) 85340 (42)
04021 64 C 49 85623 (75) 85132 (42)
04007 62 C 14 85544 (67) 85541 (50)
04019 64 C 74 85321 (74) 85742 (42)
04025 63 C 33 86335 (81) 86351 (50)
04012 78 B 9 85344 (78) 85344 (78)
04027 70 B 12 85336 (77) 85367 (67)
04015 70 B 31 86403 (82) 86442 (50)
04009 N/A N/A 8 N/A N/A
04011 N/A N/A 4 N/A N/A
04003 68 C 28 85643 (78) 85603 (58)
04023 65 C 8 85621 (67) 85648 (63)
04017 68 C 28 86025 (71) 85937 (67)
04001 74 B 28 85924 (78) 85925 (67)
04005 67 C 27 86040 (78) 86336 (53)

Most Common Contaminants in Arizona

Contaminant / RuleCategoryZIPs AffectedViolationsHealth Risk
Consumer Confidence Report Rule Reporting 220 809 Yes
Revised Total Coliform Rule Microbiological 137 749 No
Stage 1 DBP Rule Treatment Technique 132 416 Yes
Total Trihalomethanes (TTHM) Disinfection Byproducts 128 277 No
Haloacetic Acids (HAA5) Disinfection Byproducts 123 351 Yes
E. coli Microbiological 120 298 No
Lead Inorganic 115 519 Yes
Dichloroacetic Acid Disinfection Byproducts 104 263 No

Overview

We track multi-source home safety signals for 553 ZIP records across Arizona. Home Safety Score model 4.0.0 is published for 238 scored records; missing required evidence suppresses the score.

The EPA snapshots used for this build directly map water systems to 297 ZIP records, covering 282 community water systems that serve approximately 6,445,396 people.

288 of 297 ZIP codes with a reported violation count in the available EPA record (97%) have recorded EPA violations. 337 health-based violations appear in the available health breakdown.

Plumbing Regulations

Arizona follows the Uniform Plumbing Code (2018 edition).

  • Plumbing code: UPC (2018)
  • Homeowner DIY: Allowed with permit
  • Water heater permit: Required
  • Annual backflow test: Required

Full Arizona regulations →

Energy & Water Rebates

Across 343 tracked ZIP codes in Arizona, residents have access to an average of 5 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 Code City Home Safety Grade Violations Health-Based System
86426 Fort Mohave C 892 5 Bermuda Water Company Inc.
86429 Bullhead City D 862 5 North Mohave Valley
86442 Bullhead City D 842 2 Bullhead City Mohave
85365 Yuma C 515 81 City of Yuma
85298 Gilbert D 278 4 Gilbert, Town of
85249 Chandler C 269 4 City of Chandler
85367 Yuma C 236 0 Foothills Water and Sewer Llc
85635 Sierra Vista C 229 10 Bella Vista City Water System
85650 Sierra Vista C 227 8 Pueblo Del Sol Water Company
85615 Hereford — 223 8 Bella Vista Water South

Areas with No Violations

ZIP Code City Home Safety Grade System Population
85118 Gold Canyon — Arizona Water Company - Apache Junction 62,055
85173 Superior — Arizona Water Company - Superior 4,393
85282 Tempe C City of Tempe 165,000
85283 Tempe C City of Tempe 165,000
85284 Tempe C City of Tempe 165,000
85363 Youngtown B Epcor - Sun City 38,016
85618 Mammoth — Arizona Water Company - Oracle 10,585
85623 Oracle B Arizona Water Company - Oracle 10,585
85637 Sonoita — Tucson Water Corona De Tucson 10,217

Home Safety Score

Average Home Safety Score for Arizona: C (66/100) across 238 scored of 553 tracked ZIP records.

Model 4.0.0 uses the canonical components water-compliance, pfas-mcl-screen, radon-zone, annual-aqi across 3 required domains. The sections below provide additional context and do not change that score. Missing required evidence suppresses the score, and a favorable result is not a property-level safety certification.

Lead & Copper

  • Average lead level (90th percentile): 0.0027 mg/L (EPA action level: 0.015 mg/L)
  • 2 of 297 ZIP codes with known status exceed the EPA lead action level

Radon Risk

  • High risk (Zone 1): 0 ZIP codes (0%)
  • Moderate risk (Zone 2): 553 ZIP codes
  • Low risk (Zone 3): 0 ZIP codes

ZIP Code Reports for Arizona

Largest Communities

ZIP Code City Population Safety Grade Violations
85304 Glendale 2,117,442 C 14
85308 Glendale 2,117,442 C 14
85307 Glendale 1,999,956 D 14
85253 Paradise Valley 1,951,856 B 12
85251 Scottsdale 1,950,468 B 10
85383 Peoria 1,948,107 D 24
85331 Cave Creek 1,946,476 B 8
85266 Scottsdale 1,946,150 B 10
85018 Phoenix 1,936,361 B 8
85050 Phoenix 1,936,361 B 8
85254 Scottsdale 1,936,361 B 8
85255 Scottsdale 1,936,361 B 8
85260 Scottsdale 1,936,361 B 8
85305 Glendale 1,929,766 B 6
85306 Glendale 1,929,766 B 6
85310 Glendale 1,929,766 B 6
85008 Phoenix 1,860,000 B 3
85044 Phoenix 1,860,000 B 3
85353 Tolleson 1,800,430 C 12
85086 Phoenix 1,728,941 B 10

Lowest Published Home Safety Scores

ZIP Code City Score Grade Violations
85132 Florence 42 D 72
85142 Queen Creek 42 D 215
85206 Mesa 42 D 200
85212 Mesa 42 D 203
85233 Gilbert 42 D 174

Highest Published Home Safety Scores

ZIP Code City Score Grade Violations
86403 Lake Havasu City 82 B 4
86335 Rimrock 81 B 5
86322 Camp Verde 80 B 7
86406 Lake Havasu City 80 B 12
85344 Parker 78 B 12

All 553 ZIP Codes in Arizona

Data Sources

Reporting periods vary by source. Missing data is shown as unavailable, not as zero.

Largest water systems in Arizona

The 12 biggest community water systems serving Arizona, of 282 total.

Show all 12 water systems

Systems with the most violations in Arizona

12 systems in Arizona with the most recorded EPA violations.

Frequently Asked Questions

Is the water safe to drink in Arizona?

Arizona has 282 community water systems serving 6,445,396 people across 553 ZIP codes. There are 4,818 recorded violations, including 337 health-based. 288 of 553 ZIP codes have at least one violation.

What plumbing code does Arizona follow?

Arizona follows the UPC plumbing code. DIY plumbing work is allowed for homeowners.

Is lead a concern in Arizona's drinking water?

2 ZIP codes in Arizona have lead levels exceeding the EPA action level of 0.015 mg/L.

How to cite this page

APA ZipCheckup. (2026). Arizona Home Safety Profiles by ZIP. https://zipcheckup.com/states/arizona/
BibTeX 
@misc{zipcheckup-states-arizona,
  author = {{ZipCheckup}},
  title  = {{Arizona Home Safety Profiles by ZIP}},
  year   = {2026},
  url    = {https://zipcheckup.com/states/arizona/}
}

Page version: August 2026.

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