2026 Rankings

Worst ZIP Codes for Lead in Water in Maine — 2026

Last updated: June 4, 2026

253 ZIP codes ranked by Lead (mg/L) #1: ZIP 04055 (Naples, ME) — 23.0 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 253 ZIP codes with data in Maine, these are the highest-ranked areas for lead (mg/l). See also: National Worst ZIP Codes for Lead in Water | All Maine Rankings

Statistic Value
ZIP codes ranked 253
Highest value 23.0 ppb
Median value 2.1 ppb
State Maine

Top 100 Worst ZIP Codes

Rank ZIP Code City State Lead (mg/L) Safety Score
1 04055 Naples ME 23.0 ppb 38/100
2 04614 Blue Hill ME 20.8 ppb 42/100
3 04220 Buckfield ME 12.7 ppb 46/100
4 04253 Livermore ME 12.3 ppb 50/100
5 04254 Livermore Falls ME 12.3 ppb 50/100
6 04469 Orono ME 10.0 ppb 48/100
7 04473 Orono ME 10.0 ppb 51/100
8 04096 Yarmouth ME 9.5 ppb 52/100
9 04216 Andover ME 9.0 ppb 53/100
10 04938 Farmington ME 8.4 ppb 55/100
11 04740 Easton ME 7.4 ppb 63/100
12 04763 Oakfield ME 7.4 ppb 64/100
13 04976 Skowhegan ME 7.3 ppb 55/100
14 04239 Jay ME 7.1 ppb 61/100
15 03901 Berwick ME 7.0 ppb 59/100
16 04072 Saco ME 7.0 ppb 49/100
17 04944 Hinckley ME 6.9 ppb 56/100
18 04922 Burnham ME 6.7 ppb 72/100
19 04655 Machiasport ME 6.4 ppb 76/100
20 04940 Farmington Falls ME 6.4 ppb 64/100
21 04048 Limerick ME 6.3 ppb 65/100
22 04468 Old Town ME 6.3 ppb 60/100
23 04210 Auburn ME 6.2 ppb 49/100
24 04211 Auburn ME 6.2 ppb 54/100
25 04212 Auburn ME 6.2 ppb 59/100
26 04250 Lisbon ME 6.2 ppb 63/100
27 04928 Corinna ME 6.2 ppb 66/100
28 04937 Fairfield ME 6.0 ppb 58/100
29 04974 Searsport ME 6.0 ppb 81/100
30 04071 Raymond ME 5.9 ppb 43/100
31 04676 Sedgwick ME 5.9 ppb 63/100
32 04062 Windham ME 5.8 ppb 62/100
33 04092 Westbrook ME 5.8 ppb 62/100
34 04098 Westbrook ME 5.8 ppb 62/100
35 04274 Poland ME 5.8 ppb 30/100
36 04666 Pembroke ME 5.7 ppb 78/100
37 04911 Anson ME 5.6 ppb 63/100
38 04945 Jackman ME 5.6 ppb 65/100
39 04578 Wiscasset ME 5.3 ppb 56/100
40 04255 Greenwood ME 5.2 ppb 65/100
41 04342 Dresden ME 5.1 ppb 82/100
42 04463 Milo ME 5.1 ppb 61/100
43 04424 Danforth ME 5.0 ppb 79/100
44 04745 Frenchville ME 5.0 ppb 60/100
45 04217 Bethel ME 4.9 ppb 64/100
46 04294 Wilton ME 4.9 ppb 69/100
47 04488 Stetson ME 4.9 ppb 66/100
48 04032 Freeport ME 4.9 ppb 70/100
49 04033 Freeport ME 4.9 ppb 66/100
50 04034 Freeport ME 4.9 ppb 66/100
51 04221 Canton ME 4.5 ppb 59/100
52 04008 Bowdoinham ME 4.3 ppb 83/100
53 04357 Richmond ME 4.3 ppb 70/100
54 04649 Jonesport ME 4.2 ppb 59/100
55 04459 Mattawamkeag ME 4.1 ppb 69/100
56 04855 Port Clyde ME 4.1 ppb 82/100
57 03903 Eliot ME 4.0 ppb 69/100
58 03906 North Berwick ME 4.0 ppb 69/100
59 04002 Alfred ME 4.0 ppb 69/100
60 04015 Casco ME 4.0 ppb 65/100
61 04605 Ellsworth ME 4.0 ppb 55/100
62 04664 Sullivan ME 4.0 ppb 33/100
63 04677 Sorrento ME 4.0 ppb 33/100
64 04684 Surry ME 4.0 ppb 56/100
65 04739 Eagle Lake ME 4.0 ppb 65/100
66 04954 New Portland ME 4.0 ppb 65/100
67 04961 New Portland ME 4.0 ppb 69/100
68 04981 Stockton Springs ME 4.0 ppb 83/100
69 04930 Dexter ME 3.8 ppb 70/100
70 04276 Rumford ME 3.7 ppb 65/100
71 04694 Baileyville ME 3.7 ppb 83/100
72 04401 Bangor ME 3.7 ppb 52/100
73 04402 Bangor ME 3.7 ppb 57/100
74 04453 Lagrange ME 3.6 ppb 66/100
75 04634 Franklin ME 3.6 ppb 62/100
76 04441 Greenville ME 3.5 ppb 70/100
77 04640 Hancock ME 3.5 ppb 45/100
78 04345 Gardiner ME 3.4 ppb 56/100
79 04268 Norway ME 3.4 ppb 65/100
80 04429 Holden ME 3.4 ppb 67/100
81 04609 Bar Harbor ME 3.4 ppb 68/100
82 04730 Houlton ME 3.4 ppb 69/100
83 04758 Mars Hill ME 3.4 ppb 51/100
84 04924 Canaan ME 3.4 ppb 66/100
85 04964 Oquossoc ME 3.3 ppb 66/100
86 04530 Bath ME 3.2 ppb 76/100
87 04418 Greenbush ME 3.1 ppb 69/100
88 04073 Sanford ME 3.0 ppb 64/100
89 04444 Hampden ME 3.0 ppb 70/100
90 04915 Belfast ME 3.0 ppb 76/100
91 04622 Cherryfield ME 2.9 ppb 83/100
92 04430 East Millinocket ME 2.8 ppb 70/100
93 04462 Millinocket ME 2.8 ppb 70/100
94 04344 Farmingdale ME 2.7 ppb 69/100
95 04572 Waldoboro ME 2.7 ppb 66/100
96 04785 Van Buren ME 2.7 ppb 70/100
97 04921 Brooks ME 2.7 ppb 83/100
98 04289 West Paris ME 2.6 ppb 68/100
99 04750 Limestone ME 2.6 ppb 59/100
100 04751 Limestone ME 2.6 ppb 59/100

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: 2026-06-04.

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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