2026 Rankings

Worst ZIP Codes for Lead in Water in Arizona — 2026

Last updated: August 11, 2026

213 ZIP codes ranked by Lead (ppb) #1: ZIP 85730 (Tucson, AZ) - 27.0 ppb
Lead Violations Lowest Score Safest Flood Risk Energy Cost Radon PFAS Reliability EJ Index Homebuyer Risk CO & Gas Safest Gas Remediation Burden Unresolved Violations (by Utility) Water Equity (by Utility)

Out of 213 ZIP codes with data in Arizona, these are the highest-ranked areas for lead (ppb). See also: National Worst ZIP Codes for Lead in Water | All Arizona Rankings

Statistic Value
ZIP codes ranked 213
Highest value 27.0 ppb
Median value 2.7 ppb
State Arizona

Top 100 Worst ZIP Codes

Rank ZIP Code City State Lead (ppb) Safety Score
1 85730 Tucson AZ 27.0 ppb 59/100
2 86429 Bullhead City AZ 22.0 ppb 50/100
3 85541 Payson AZ 13.0 ppb 50/100
4 85544 Pine AZ 13.0 ppb 67/100
5 85901 Show Low AZ 13.0 ppb 67/100
6 85934 Pinedale AZ 13.0 ppb —
7 85365 Yuma AZ 12.6 ppb 67/100
8 85653 Marana AZ 12.0 ppb 42/100
9 85736 Tucson AZ 11.0 ppb 70/100
10 85925 Eagar AZ 11.0 ppb 67/100
11 85928 Heber AZ 11.0 ppb —
12 85933 Overgaard AZ 11.0 ppb 69/100
13 85938 Springerville AZ 11.0 ppb —
14 85248 Chandler AZ 10.0 ppb 58/100
15 85929 Lakeside AZ 10.0 ppb 67/100
16 85935 Pinetop AZ 10.0 ppb 67/100
17 86314 Prescott Valley AZ 10.0 ppb 67/100
18 85344 Parker AZ 9.9 ppb 78/100
19 85346 Quartzsite AZ 9.9 ppb —
20 85602 Benson AZ 8.1 ppb 67/100
21 85641 Vail AZ 8.1 ppb 58/100
22 85747 Tucson AZ 8.1 ppb 66/100
23 85704 Tucson AZ 7.9 ppb 58/100
24 85545 Roosevelt AZ 7.5 ppb —
25 85629 Sahuarita AZ 7.0 ppb 58/100
26 85756 Tucson AZ 7.0 ppb 60/100
27 85253 Paradise Valley AZ 6.9 ppb 71/100
28 85615 Hereford AZ 6.9 ppb —
29 85650 Sierra Vista AZ 6.9 ppb 67/100
30 86305 Prescott AZ 6.0 ppb 50/100
31 86324 Clarkdale AZ 6.0 ppb 78/100
32 86325 Cornville AZ 6.0 ppb —
33 86336 Sedona AZ 6.0 ppb 53/100
34 86351 Sedona AZ 6.0 ppb 50/100
35 85619 Mount Lemmon AZ 5.7 ppb —
36 86426 Fort Mohave AZ 5.6 ppb 67/100
37 86440 Mohave Valley AZ 5.6 ppb 67/100
38 86442 Bullhead City AZ 5.6 ppb 50/100
39 85120 Apache Junction AZ 5.0 ppb 58/100
40 85201 Mesa AZ 5.0 ppb 66/100
41 85202 Mesa AZ 5.0 ppb 66/100
42 85203 Mesa AZ 5.0 ppb 66/100
43 85204 Mesa AZ 5.0 ppb 66/100
44 85205 Mesa AZ 5.0 ppb 66/100
45 85206 Mesa AZ 5.0 ppb 42/100
46 85207 Mesa AZ 5.0 ppb 66/100
47 85208 Mesa AZ 5.0 ppb 66/100
48 85209 Mesa AZ 5.0 ppb 58/100
49 85210 Mesa AZ 5.0 ppb 66/100
50 85212 Mesa AZ 5.0 ppb 42/100
51 85213 Mesa AZ 5.0 ppb 66/100
52 85215 Mesa AZ 5.0 ppb 66/100
53 85234 Gilbert AZ 5.0 ppb 42/100
54 85281 Tempe AZ 5.0 ppb 48/100
55 85249 Chandler AZ 5.0 ppb 58/100
56 85298 Gilbert AZ 5.0 ppb 42/100
57 85008 Phoenix AZ 4.4 ppb 74/100
58 85044 Phoenix AZ 4.4 ppb 74/100
59 85282 Tempe AZ 4.4 ppb 58/100
60 85283 Tempe AZ 4.4 ppb 58/100
61 85284 Tempe AZ 4.4 ppb 58/100
62 85706 Tucson AZ 4.1 ppb 68/100
63 86326 Cottonwood AZ 4.1 ppb 69/100
64 86333 Mayer AZ 4.1 ppb —
65 86406 Lake Havasu City AZ 4.0 ppb 80/100
66 85142 Queen Creek AZ 3.9 ppb 42/100
67 85390 Wickenburg AZ 3.6 ppb 65/100
68 86001 Flagstaff AZ 3.6 ppb 67/100
69 86004 Flagstaff AZ 3.6 ppb 67/100
70 86005 Flagstaff AZ 3.6 ppb 67/100
71 86011 Flagstaff AZ 3.6 ppb 67/100
72 85225 Chandler AZ 3.3 ppb 58/100
73 85286 Chandler AZ 3.3 ppb 58/100
74 85361 Wittmann AZ 3.3 ppb 68/100
75 85387 Surprise AZ 3.3 ppb 61/100
76 86403 Lake Havasu City AZ 3.1 ppb 82/100
77 86404 Lake Havasu City AZ 3.1 ppb 78/100
78 85630 Saint David AZ 3.0 ppb —
79 85705 Tucson AZ 3.0 ppb 42/100
80 85003 Phoenix AZ 2.7 ppb 74/100
81 85004 Phoenix AZ 2.7 ppb 74/100
82 85006 Phoenix AZ 2.7 ppb 74/100
83 85007 Phoenix AZ 2.7 ppb 74/100
84 85009 Phoenix AZ 2.7 ppb 74/100
85 85012 Phoenix AZ 2.7 ppb 74/100
86 85013 Phoenix AZ 2.7 ppb 74/100
87 85014 Phoenix AZ 2.7 ppb 74/100
88 85015 Phoenix AZ 2.7 ppb 74/100
89 85016 Phoenix AZ 2.7 ppb 74/100
90 85017 Phoenix AZ 2.7 ppb 74/100
91 85018 Phoenix AZ 2.7 ppb 73/100
92 85019 Phoenix AZ 2.7 ppb 74/100
93 85020 Phoenix AZ 2.7 ppb 74/100
94 85021 Phoenix AZ 2.7 ppb 74/100
95 85022 Phoenix AZ 2.7 ppb 74/100
96 85023 Phoenix AZ 2.7 ppb 74/100
97 85024 Phoenix AZ 2.7 ppb 74/100
98 85026 Phoenix AZ 2.7 ppb —
99 85027 Phoenix AZ 2.7 ppb 72/100
100 85028 Phoenix AZ 2.7 ppb 74/100

Methodology

Lead rankings are based on the 90th percentile lead testing value (PB90) reported by water systems under the Lead and Copper Rule. When CCR data is unavailable, EPA SDWIS lead sampling data is used. The EPA action level for lead is 15 ppb (0.015 mg/L). There is no safe level of lead exposure.

Data sources: EPA Safe Drinking Water Information System (SDWIS), FEMA National Flood Insurance Program, EPA radon zone maps, EIA electricity rates, and Consumer Confidence Reports. Last updated: 2026-08-11.

Frequently Asked Questions

What is a dangerous lead level in water?

The EPA action level is 15 parts per billion (ppb). The American Academy of Pediatrics recommends no more than 1 ppb for school drinking water. There is no safe level of lead exposure for children.

How is lead measured in water?

Water systems collect samples from homes with known lead service lines or lead solder. The 90th percentile value (PB90) means 90% of samples tested below that level. If PB90 exceeds 15 ppb, the system must take corrective action.

Explore More Rankings

How this ranking is calculated, data sources, and limitations: Rankings Methodology →

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Disclaimer: Rankings are based on EPA, FEMA, and federal agency data. They reflect historical patterns and risk indicators, not necessarily current conditions. For the most current information, contact your local water utility or request a Consumer Confidence Report.

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