2026 Rankings

ZIP Codes Ranked by Water-System Lead Results…

Last updated: October 14, 2026

178 ZIP codes ranked by Lead (ppb) #1: ZIP 86429 (Bullhead City, AZ) - 22.0 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 178 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 178
Highest value 22.0 ppb
Median value 2.7 ppb
State Arizona

Top 100 Worst ZIP Codes

Rank ZIP Code City State Lead (ppb) Safety Score
1 86429 Bullhead City AZ 22.0 ppb 50/100
2 85544 Pine AZ 13.0 ppb 67/100
3 85934 Pinedale AZ 13.0 ppb —
4 85736 Tucson AZ 11.0 ppb 70/100
5 85925 Eagar AZ 11.0 ppb 67/100
6 85938 Springerville AZ 11.0 ppb —
7 85248 Chandler AZ 10.0 ppb 58/100
8 85935 Pinetop AZ 10.0 ppb 67/100
9 85344 Parker AZ 9.9 ppb 78/100
10 85346 Quartzsite AZ 9.9 ppb —
11 85929 Lakeside AZ 7.8 ppb 67/100
12 85545 Roosevelt AZ 7.5 ppb —
13 86336 Sedona AZ 6.0 ppb 53/100
14 86426 Fort Mohave AZ 5.6 ppb 67/100
15 86440 Mohave Valley AZ 5.6 ppb 67/100
16 85201 Mesa AZ 5.0 ppb 66/100
17 85202 Mesa AZ 5.0 ppb 66/100
18 85203 Mesa AZ 5.0 ppb 66/100
19 85204 Mesa AZ 5.0 ppb 66/100
20 85205 Mesa AZ 5.0 ppb 66/100
21 85206 Mesa AZ 5.0 ppb 42/100
22 85207 Mesa AZ 5.0 ppb 66/100
23 85208 Mesa AZ 5.0 ppb 66/100
24 85209 Mesa AZ 5.0 ppb 58/100
25 85210 Mesa AZ 5.0 ppb 66/100
26 85212 Mesa AZ 5.0 ppb 42/100
27 85213 Mesa AZ 5.0 ppb 66/100
28 85215 Mesa AZ 5.0 ppb 66/100
29 85281 Tempe AZ 4.4 ppb 48/100
30 85282 Tempe AZ 4.4 ppb 58/100
31 85283 Tempe AZ 4.4 ppb 58/100
32 85284 Tempe AZ 4.4 ppb 58/100
33 86326 Cottonwood AZ 4.1 ppb 69/100
34 86333 Mayer AZ 4.1 ppb —
35 86001 Flagstaff AZ 3.6 ppb 67/100
36 86004 Flagstaff AZ 3.6 ppb 67/100
37 86005 Flagstaff AZ 3.6 ppb 67/100
38 86011 Flagstaff AZ 3.6 ppb 67/100
39 85541 Payson AZ 3.5 ppb 50/100
40 86403 Lake Havasu City AZ 3.1 ppb 82/100
41 86404 Lake Havasu City AZ 3.1 ppb 78/100
42 86406 Lake Havasu City AZ 3.1 ppb 80/100
43 85003 Phoenix AZ 2.7 ppb 74/100
44 85004 Phoenix AZ 2.7 ppb 74/100
45 85006 Phoenix AZ 2.7 ppb 74/100
46 85007 Phoenix AZ 2.7 ppb 74/100
47 85008 Phoenix AZ 2.7 ppb 74/100
48 85009 Phoenix AZ 2.7 ppb 74/100
49 85012 Phoenix AZ 2.7 ppb 74/100
50 85013 Phoenix AZ 2.7 ppb 74/100
51 85014 Phoenix AZ 2.7 ppb 74/100
52 85015 Phoenix AZ 2.7 ppb 74/100
53 85016 Phoenix AZ 2.7 ppb 74/100
54 85017 Phoenix AZ 2.7 ppb 74/100
55 85018 Phoenix AZ 2.7 ppb 73/100
56 85019 Phoenix AZ 2.7 ppb 74/100
57 85020 Phoenix AZ 2.7 ppb 74/100
58 85021 Phoenix AZ 2.7 ppb 74/100
59 85022 Phoenix AZ 2.7 ppb 74/100
60 85023 Phoenix AZ 2.7 ppb 74/100
61 85024 Phoenix AZ 2.7 ppb 74/100
62 85027 Phoenix AZ 2.7 ppb 72/100
63 85028 Phoenix AZ 2.7 ppb 74/100
64 85029 Phoenix AZ 2.7 ppb 74/100
65 85031 Phoenix AZ 2.7 ppb 74/100
66 85032 Phoenix AZ 2.7 ppb 74/100
67 85033 Phoenix AZ 2.7 ppb 74/100
68 85034 Phoenix AZ 2.7 ppb 74/100
69 85035 Phoenix AZ 2.7 ppb 74/100
70 85037 Phoenix AZ 2.7 ppb 74/100
71 85040 Phoenix AZ 2.7 ppb 74/100
72 85041 Phoenix AZ 2.7 ppb 74/100
73 85042 Phoenix AZ 2.7 ppb 74/100
74 85043 Phoenix AZ 2.7 ppb 66/100
75 85044 Phoenix AZ 2.7 ppb 74/100
76 85045 Phoenix AZ 2.7 ppb 74/100
77 85048 Phoenix AZ 2.7 ppb 74/100
78 85050 Phoenix AZ 2.7 ppb 73/100
79 85051 Phoenix AZ 2.7 ppb 74/100
80 85053 Phoenix AZ 2.7 ppb 74/100
81 85054 Phoenix AZ 2.7 ppb 74/100
82 85083 Phoenix AZ 2.7 ppb 70/100
83 85085 Phoenix AZ 2.7 ppb 74/100
84 85086 Phoenix AZ 2.7 ppb 71/100
85 85087 New River AZ 2.7 ppb 71/100
86 85253 Paradise Valley AZ 2.7 ppb 71/100
87 85254 Scottsdale AZ 2.7 ppb 73/100
88 85306 Glendale AZ 2.7 ppb 73/100
89 85307 Glendale AZ 2.7 ppb 54/100
90 85308 Glendale AZ 2.7 ppb 69/100
91 85310 Glendale AZ 2.7 ppb 73/100
92 85331 Cave Creek AZ 2.7 ppb 73/100
93 85339 Laveen AZ 2.7 ppb 74/100
94 85353 Tolleson AZ 2.7 ppb 55/100
95 85750 Tucson AZ 2.6 ppb 71/100
96 85250 Scottsdale AZ 2.3 ppb 73/100
97 85251 Scottsdale AZ 2.3 ppb 72/100
98 85255 Scottsdale AZ 2.3 ppb 73/100
99 85257 Scottsdale AZ 2.3 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: 2026-10-14.

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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