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Updated 2026-09-16
State water report

Maine Water Quality: 11 Cities Ranked by the Records

Water quality across 11 cities in Maine, drawn from EPA drinking-water records. Each city page shows the measured contaminants and a reproducible Purity Score.

Finding by finding

What Maine's records show

Counts of cities whose serving system reported each result. There is no statewide score: PurityMap does not average local records into a statewide safety verdict.

PFAS above a 2024 limit

MCL

2of 11 cities

Cities whose system reported a PFAS above its federal limit.

PFOS in Maine →
City rankings

Maine cities ranked by the records

Highest first. A summary of each serving system’s record, not a safety verdict.

  1. 1
    Brunswick/Topsham DistrictBRUNSWICK/TOPSHAM WATER DISTRICT · ME0090260
    Report →
  2. 2
    Kennebunk Kennebunkport Wells WdKENNEBUNK, KENNEBUNKPORT & WELLS WD · ME0090760
    Report →
  3. 3
    Greater Augusta DistrictGREATER AUGUSTA UTILITY DISTRICT · ME0090080
    Report →
  4. 4
    Portland District-GreaterPORTLAND WATER DISTRICT-GREATER · ME0091300
    Report →
  5. 5
    Kittery DistrictKITTERY WATER DISTRICT · ME0090790
    Report →
  6. 6
    York DistrictYORK WATER DISTRICT · ME0091680
    Report →
  7. 7
    LewistonLEWISTON WATER & SEWER DIVISION · ME0090830
    Report →
  8. 8
    Auburn DistrictAUBURN WATER DISTRICT · ME0090070
    Report →
  9. 9
    Bangor DistrictBANGOR WATER DISTRICT · ME0090110
    Report →
  10. 10
    Kennebec DistrictKENNEBEC WATER DISTRICT · ME0090750
    Report →

Showing the top 10 of 11 scored cities.

See all 11 in the table

11 cities, highest Purity Score first

  1. 1Brunswick/Topsham District
    BRUNSWICK/TOPSHAM WATER DISTRICT · PWSID ME0090260 · Purity Score 100/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detectedNot detected
  2. 2Kennebunk Kennebunkport Wells Wd
    KENNEBUNK, KENNEBUNKPORT & WELLS WD · PWSID ME0090760 · Purity Score 99/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detected; lead 1 µg/LDetected
  3. 3Greater Augusta District
    GREATER AUGUSTA UTILITY DISTRICT · PWSID ME0090080 · Purity Score 99/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detected; lead 1.1 µg/LDetected
  4. 4Portland District-Greater
    PORTLAND WATER DISTRICT-GREATER · PWSID ME0091300 · Purity Score 98/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detected; lead 1.9 µg/LDetected
  5. 5Kittery District
    KITTERY WATER DISTRICT · PWSID ME0090790 · Purity Score 98/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detected; lead 2 µg/LDetected
  6. 6York District
    YORK WATER DISTRICT · PWSID ME0091680 · Purity Score 98/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detected; lead 2 µg/LDetected
  7. 7Lewiston
    LEWISTON WATER & SEWER DIVISION · PWSID ME0090830 · Purity Score 97/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detected; lead 2.3 µg/LDetected
  8. 8Auburn District
    AUBURN WATER DISTRICT · PWSID ME0090070 · Purity Score 93/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detected; lead 6.2 µg/LDetected
  9. 9Bangor District
    BANGOR WATER DISTRICT · PWSID ME0090110 · Purity Score 91/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detected; lead 7.45 µg/LDetected
  10. 10Kennebec District
    KENNEBEC WATER DISTRICT · PWSID ME0090750 · Purity Score 64/100 (Fair) · Confidence: moderate · Assessed at the water-system level
    PFOA 6.4 ng/L, 1.6× the EPA limitAbove reference
  11. 11Sanford District
    SANFORD WATER DISTRICT · PWSID ME0091410 · Purity Score 58/100 (Fair) · Confidence: moderate · Assessed at the water-system level
    PFOS 7.1 ng/L, 1.8× the EPA limit (+1 more PFAS above)Above reference
End of list.

Ranked by the Purity Score of each city's main water system, highest first. Scores belong to water systems; there is no state score. The score is computed only from contaminants measured in the published EPA record, so this ranks the record, not which city's water is safest. How the score works. See how Maine compares with other states.

By contaminant

PFAS and lead in Maine

Counties

Maine counties

1 county with city reports
Suppliers

Largest water systems

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Full indexAll 11 Maine city reports, A–Z
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Questions

Maine water, frequently asked

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How does Maine tap water compare across cities?

PurityMap ranks 11 cities in Maine by the Purity Score of each city's main water system, computed only from contaminants measured in the published EPA record. Scores belong to water systems, not to cities. The highest published score is Brunswick/Topsham District's main water system: BRUNSWICK/TOPSHAM WATER DISTRICT · PWSID ME0090260 · Purity Score 100 (Excellent) · Confidence: moderate · Assessed at the water-system level. The ranking compares the records, not which city's water is safest, and your own tap can differ with household plumbing.

How many Maine cities have PFAS above the federal limit?

2 cities of 11 had at least one regulated PFAS (PFOA, PFOS or PFHxS) measured above the 2024 federal limit in EPA's UCMR 5 testing, including Sanford District (PFOS 7.1 ng/L), Kennebec District (PFOA 6.4 ng/L). PFAS were detected at any level in 2.

Is there lead in Maine tap water?

Utilities report lead as a 90th-percentile result from home taps. 10 of 11 Maine cities reported a value above zero, and none was above the 15 µg/L federal action level. Lead usually comes from a building's own pipes and fixtures, so only a test at your tap tells you what you drink.

Limits, sources and corrections

A statewide page cannot tell you what reaches a specific address. Water quality varies by supplier, sampling period and household plumbing; open a city report for the evidence behind a local result.

Sources: EPA UCMR 5 (PFAS, 2024), SDWIS Lead and Copper Rule 90th-percentile results and health-based violations, and utility Consumer Confidence Reports where on file. Every city report links its dated source records.

Updated 2026-09-16. How PurityMap analyzes water data · Report an error