COUNTY REPORT AZ

Maricopa County, Arizona

199 ZIP codes · Avg score 66/100 · Grade C

ZipCheckup grade for Maricopa County: C.

A mixed picture - some signals here are worth your attention.

ZipCheckup gives Maricopa County a C; the county page lists 199 ZIP codes, each with its own report.

How Maricopa County Compares

Maricopa County66/100
Arizona avg66/100
National avg73/100

How Maricopa County Compares

C
County Grade
66/100
Avg Safety Score
199
ZIP Codes
63
Water Systems

Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData

C
County Grade
66
Avg Safety Score
199
ZIP Codes
Youngtown
Best ZIP: 85363 (75/100)
Litchfield Park
Lowest ZIP: 85340 (42/100)
$400K
Median Home Value
$672
Avg Remediation (0.17% of home value)

ZIP Code Risk Map

Water Quality Map: Maricopa County, Arizona

Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.

A B C D F

Key Risk Factors

Health risk index: 11.3 (asthma 10%, diabetes 10.6%)

Modeled additional annual cost estimate per homeowner: $1,753, largest modeled factor: Wildfire

30% of homes built before 1980 (lead paint was banned for residential use in 1978)

County Health Indicators vs National Average

Asthma 10% (national: 8.9%)
Diabetes 10.6% (national: 10.5%)
Obesity 30.4% (national: 32.4%)

Black markers indicate national averages. Source: CDC PLACES, Census ACS.

Infrastructure Overview

1991
Median Build Year
30%
Pre-1980 Housing
34/100
Infrastructure Stress Indicator
20%
ZIPs with High Infrastructure Stress
Low
Lead Pipe Risk

Modeled area-level indicator, not a failure probability. Sources: Census ACS housing age, EPA DWINSA infrastructure needs, EPA SDWIS violations, and EPA lead indicators.

Compound Risk Breakdown

Estimated additional annual cost per homeowner: $1,753

Wildfire $1,200/yr
Flood $677/yr
Energy Code Gap $112/yr

Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).

Housing Age Distribution

1,826,397 housing units in Maricopa County

Pre-1940 1%
1940–1959 6%
1960–1979 23%
1980–1999 36%
2000+ 34%

Source: U.S. Census Bureau ACS B25034 (Year Structure Built).

Water Safety Affordability

How much it costs to fix water issues relative to home values in Maricopa County

$400K
Median Home Value
$672
Est. Remediation Cost
0.2%
of Home Value
Remediation as % of home value low burden

Modeled remediation costs in Maricopa County can be compared with the median property value; actual costs vary by property.

Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.

Health Outcomes vs National Average

CDC PLACES data for Maricopa County residents

Asthma 10% (US avg: 8.9%)
Diabetes 10.6% (US avg: 11%)
Obesity 30.4% (US avg: 32.4%)

Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.

Water systems mapped to Maricopa County ZIP codes

8 community water systems mapped to Maricopa County ZIP codes; EPA may list more systems serving the county.

Show all 8 water systems

63 water systems mapped to Maricopa County ZIP codes in our data; EPA may list more systems serving the county.

Systems with the most violations in Maricopa County

5 water systems with violations in EPA records.

All ZIP Codes in Maricopa County

199 ZIP codes tracked in Maricopa County.

# ZIP Code City Safety Score Grade Violations Home Value
1 85363 Youngtown 75 B 0 $283K
2 85003 Phoenix 74 B 3 (1 health) $578K
3 85004 Phoenix 74 B 3 (1 health) $366K
4 85006 Phoenix 74 B 3 (1 health) $377K
5 85007 Phoenix 74 B 3 (1 health) $447K
6 85008 Phoenix 74 B 3 (1 health) $324K
7 85009 Phoenix 74 B 3 (1 health) $215K
8 85012 Phoenix 74 B 3 (1 health) $701K
9 85013 Phoenix 74 B 3 (1 health) $476K
10 85014 Phoenix 74 B 3 (1 health) $448K
11 85015 Phoenix 74 B 3 (1 health) $313K
12 85016 Phoenix 74 B 3 (1 health) $508K
13 85017 Phoenix 74 B 3 (1 health) $243K
14 85019 Phoenix 74 B 3 (1 health) $256K
15 85020 Phoenix 74 B 3 (1 health) $401K
16 85021 Phoenix 74 B 3 (1 health) $433K
17 85022 Phoenix 74 B 3 (1 health) $386K
18 85023 Phoenix 74 B 3 (1 health) $359K
19 85024 Phoenix 74 B 3 (1 health) $430K
20 85028 Phoenix 74 B 3 (1 health) $583K
21 85029 Phoenix 74 B 3 (1 health) $308K
22 85031 Phoenix 74 B 3 (1 health) $240K
23 85032 Phoenix 74 B 3 (1 health) $388K
24 85033 Phoenix 74 B 3 (1 health) $246K
25 85034 Phoenix 74 B 3 (1 health) $397K
26 85035 Phoenix 74 B 3 (1 health) $244K
27 85037 Phoenix 74 B 3 (1 health) $291K
28 85040 Phoenix 74 B 3 (1 health) $295K
29 85041 Phoenix 74 B 3 (1 health) $310K
30 85042 Phoenix 74 B 3 (1 health) $353K
31 85044 Phoenix 74 B 3 (1 health) $437K
32 85045 Phoenix 74 B 3 (1 health) $591K
33 85048 Phoenix 74 B 3 (1 health) $539K
34 85051 Phoenix 74 B 3 (1 health) $288K
35 85053 Phoenix 74 B 3 (1 health) $330K
36 85054 Phoenix 74 B 3 (1 health) $618K
37 85085 Phoenix 74 B 3 (1 health) $589K
38 85257 Scottsdale 74 B 5 $453K
39 85258 Scottsdale 74 B 5 $745K
40 85263 Rio Verde 74 B 3 $776K
41 85264 Fort Mcdowell 74 B 5 $390K
42 85339 Laveen 74 B 3 (1 health) $398K
43 85377 Carefree 74 B 7 $1059K
44 85018 Phoenix 73 B 8 (1 health) $806K
45 85050 Phoenix 73 B 8 (1 health) $564K
46 85250 Scottsdale 73 B 7 $508K
47 85254 Scottsdale 73 B 8 (1 health) $702K
48 85255 Scottsdale 73 B 8 (1 health) $975K
49 85260 Scottsdale 73 B 8 (1 health) $637K
50 85266 Scottsdale 73 B 10 (1 health) $1027K
51 85305 Glendale 73 B 6 (1 health) $410K
52 85306 Glendale 73 B 6 (1 health) $342K
53 85310 Glendale 73 B 6 (1 health) $489K
54 85331 Cave Creek 73 B 8 (1 health) $674K
55 85027 Phoenix 72 B 7 (4 health) $316K
56 85251 Scottsdale 72 B 10 (1 health) $501K
57 85259 Scottsdale 72 B 9 $956K
58 85262 Scottsdale 72 B 10 $1179K
59 85268 Fountain Hills 72 B 9 $577K
60 85086 Phoenix 71 B 10 (1 health) $554K
61 85087 New River 71 B 10 (1 health) $511K
62 85253 Paradise Valley 71 B 12 (1 health) $2000K
63 85337 Gila Bend 71 B 10 $121K
64 85351 Sun City 71 B 8 $250K
65 85375 Sun City West 71 B 12 $351K
66 85083 Phoenix 70 B 10 (2 health) $573K
67 85301 Glendale 70 B 11 $218K
68 85302 Glendale 70 B 11 $327K
69 85303 Glendale 70 B 11 $287K
70 85304 Glendale 69 C 14 (1 health) $345K
71 85308 Glendale 69 C 14 (1 health) $420K
72 85361 Wittmann 68 C 23 $389K
73 85373 Sun City 68 C 17 $317K
74 85043 Phoenix 66 C 12 (3 health) $289K
75 85201 Mesa 66 C 26 $293K
76 85202 Mesa 66 C 26 $334K
77 85203 Mesa 66 C 26 $388K
78 85204 Mesa 66 C 26 $296K
79 85205 Mesa 66 C 26 $301K
80 85207 Mesa 66 C 26 $461K
81 85208 Mesa 66 C 26 $261K
82 85210 Mesa 66 C 26 $302K
83 85213 Mesa 66 C 26 $408K
84 85215 Mesa 66 C 26 $398K
85 85379 Surprise 66 C 49 (2 health) $414K
86 85388 Surprise 66 C 47 (2 health) $420K
87 85390 Wickenburg 65 C 23 (2 health) $466K
88 85387 Surprise 61 C 64 (2 health) $454K
89 85335 El Mirage 59 C 65 (2 health) $282K
90 85374 Surprise 59 C 67 (2 health) $356K
91 85396 Buckeye 59 C 68 (2 health) $451K
92 85209 Mesa 58 C 200 $364K
93 85224 Chandler 58 C 77 $391K
94 85225 Chandler 58 C 83 $387K
95 85226 Chandler 58 C 77 $452K
96 85248 Chandler 58 C 94 (2 health) $489K
97 85249 Chandler 58 C 269 (4 health) $611K
98 85282 Tempe 58 C 0 $370K
99 85283 Tempe 58 C 0 $410K
100 85284 Tempe 58 C 0 $646K
101 85286 Chandler 58 C 83 $549K
102 85326 Buckeye 58 C 76 (2 health) $342K
103 85355 Waddell 58 C 71 (7 health) $444K
104 85378 Surprise 58 C 77 (2 health) $235K
105 85309 Glendale Luke Afb 57 C 5 —
106 85392 Avondale 56 C 7 (1 health) $365K
107 85353 Tolleson 55 C 12 (1 health) $345K
108 85307 Glendale 54 D 14 (2 health) $369K
109 85323 Avondale 54 D 41 $335K
110 85381 Peoria 54 D 11 $408K
111 85382 Peoria 52 D 15 $408K
112 85383 Peoria 49 D 24 (1 health) $608K
113 85281 Tempe 48 D 31 $364K
114 85338 Goodyear 48 D 57 (2 health) $396K
115 85345 Peoria 47 D 29 $278K
116 85395 Goodyear 44 D 91 (3 health) $525K
117 85142 Queen Creek 42 D 215 $521K
118 85206 Mesa 42 D 200 $323K
119 85212 Mesa 42 D 203 $531K
120 85233 Gilbert 42 D 174 $469K
121 85234 Gilbert 42 D 200 $489K
122 85236 Higley 42 D 174 —
123 85295 Gilbert 42 D 174 $527K
124 85296 Gilbert 42 D 182 (1 health) $496K
125 85297 Gilbert 42 D 174 $559K
126 85298 Gilbert 42 D 278 (4 health) $598K
127 85340 Litchfield Park 42 D 79 (7 health) $500K
128 85001 Phoenix — — —
129 85002 Phoenix — — —
130 85005 Phoenix — — —
131 85010 Phoenix — — —
132 85011 Phoenix — — —
133 85025 Phoenix — — —
134 85026 Phoenix — — 3 (1 health) —
135 85030 Phoenix — — —
136 85036 Phoenix — — —
137 85038 Phoenix — — —
138 85039 Phoenix — — —
139 85046 Phoenix — — —
140 85055 Phoenix — — —
141 85060 Phoenix — — —
142 85061 Phoenix — — —
143 85062 Phoenix — — —
144 85063 Phoenix — — —
145 85064 Phoenix — — —
146 85065 Phoenix — — —
147 85066 Phoenix — — —
148 85067 Phoenix — — —
149 85068 Phoenix — — —
150 85069 Phoenix — — —
151 85070 Phoenix — — —
152 85071 Phoenix — — —
153 85072 Phoenix — — —
154 85073 Phoenix — — —
155 85074 Phoenix — — —
156 85075 Phoenix — — —
157 85076 Phoenix — — —
158 85078 Phoenix — — —
159 85079 Phoenix — — —
160 85080 Phoenix — — —
161 85082 Phoenix — — —
162 85097 Phoenix — — —
163 85098 Phoenix — — —
164 85127 Chandler Heights — — —
165 85190 Tortilla Flat — — —
166 85211 Mesa — — —
167 85214 Mesa — — —
168 85216 Mesa — — —
169 85227 Chandler Heights — — —
170 85244 Chandler — — —
171 85252 Scottsdale — — —
172 85256 Scottsdale — — $132K
173 85261 Scottsdale — — —
174 85267 Scottsdale — — —
175 85269 Fountain Hills — — —
176 85271 Scottsdale — — —
177 85274 Mesa — — —
178 85275 Mesa — — —
179 85277 Mesa — — —
180 85280 Tempe — — —
181 85285 Tempe — — —
182 85287 Tempe — — —
183 85289 Tempe — — —
184 85299 Gilbert — — —
185 85311 Glendale — — —
186 85312 Glendale — — —
187 85318 Glendale — — —
188 85320 Aguila — — $398K
189 85322 Arlington — — $237K
190 85327 Cave Creek — — —
191 85329 Cashion — — 4 $244K
192 85342 Morristown — — 10 $268K
193 85343 Palo Verde — — $550K
194 85354 Tonopah — — 6 $278K
195 85358 Wickenburg — — —
196 85372 Sun City — — —
197 85376 Sun City West — — —
198 85380 Peoria — — —
199 85385 Peoria — — —

Recommended Buyer Guides for Maricopa County

When no specific signal shows up in the records, the list falls back to general water testing and filtration guides rather than staying empty.

Deep Dive Reports

Detailed analysis for Maricopa County, Arizona

Overview

Maricopa County in Arizona covers 199 tracked ZIP records with an average Home Safety Score of C (66/100) across 127 scored records.

127 of 131 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 25 health-based violations appear in the available health breakdown.

← Back to Arizona Home Safety Profile

Data Sources

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

Frequently Asked Questions

Is water safe in Maricopa County?
Maricopa County receives a grade of C. Some ZIP codes have recorded violations and residents in affected areas may want to test their water.
How many water systems serve Maricopa County?
We map 63 public water systems to 199 ZIP codes in our data for Maricopa County. EPA may list more systems serving the county, so this is not a full count.
What is the biggest environmental risk in Maricopa County?
In ZipCheckup's cost model, the factor with the largest estimated average annual cost in Maricopa County is wildfire. Across all modeled risk factors, the estimated average additional annual cost is $1,753 per homeowner; actual costs vary by home.
How old are homes in Maricopa County?
The median home build year in Maricopa County is 1991. 30% of homes were built before 1980; homes built before 1978 may contain lead-based paint, and older homes may have older plumbing materials.
How does Maricopa County compare to Arizona?
Maricopa County has an average Home Safety Score of 66/100 under model 4.0.0, which is at or above the Arizona state average of 66/100.

How to cite this page

APA ZipCheckup. (2026). Maricopa County, AZ: HSS 66/100; PFAS Found in Water. https://zipcheckup.com/county/arizona/maricopa/
BibTeX 
@misc{zipcheckup-county-arizona-maricopa,
  author = {{ZipCheckup}},
  title  = {{Maricopa County, AZ: HSS 66/100; PFAS Found in Water}},
  year   = {2026},
  url    = {https://zipcheckup.com/county/arizona/maricopa/}
}

Page version: October 2026.

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