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Houlton, ME Tap Water Quality 2026

Water quality report for Houlton, ME — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

A look at Houlton's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.

Main Utility: Houlton Water Company PWSID: ME0090700 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 3.40 ppb, 23% of the action level and no violations are open. PFAS was detected below the federal limit.

A

Houlton earns an A for water quality

Graded on violations, lead, and PFAS, with state inspection findings.

Lead: 3.40 ppb — 23% of the federal action level
PFAS detected below the federal limit
7 violations since 2015, 0 health-based
No violations currently open
Houlton's lead level vs. all Maine community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 3.40 ppb — 23% of the federal action level
✓ Lower lead than 29% of Maine utilities
Population Served
4586
~1894 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
0
7 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
23% of EPA action level
3.40 ppb
Action level: 15 ppb
The 90th-percentile lead result is 3.40 ppb, 23% of the 15 ppb federal action level. The action level is a treatment trigger, not a legal maximum, and it is measured across sampled taps rather than at any single home.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
Consumer Confidence Rule OTHER — — 2023 Resolved
Consumer Confidence Rule OTHER — — 2021 Resolved
Diquat MONITORING AND REPORTING — 0.02 mg/L 2021–2023 Resolved
Diquat MONITORING AND REPORTING — 0.02 mg/L 2021–2023 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2017 Resolved
Endothall MONITORING AND REPORTING — 0.1 mg/L 2015–2023 Resolved
Endothall MONITORING AND REPORTING — 0.1 mg/L 2015–2023 Resolved
Understanding violation types MCL violations mean a contaminant exceeded the federal maximum limit — the most serious type.
TT (Treatment Technique) violations mean required treatment procedures weren't followed, but don't necessarily mean contamination occurred.

Violation History

7 violations are on record since 2015, of which 0 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Houlton Water Company
PWSID ME0090700
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 4,586
Service connections 1,894
Systems serving this area 2
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Houlton tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 3.40 ppb, 23% of the action level.
Does Houlton water have PFAS? ▼
PFAS was detected but stayed below the federal limit.
Who supplies water to Houlton? ▼
Houlton Water Company (PWSID ME0090700), one of 2 systems serving this area. Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2025-12-11. No significant deficiencies were recorded.

What Should Houlton Residents Do?

1
Read your annual water report
Your supplier publishes a Consumer Confidence Report each July covering the prior year.
2
Check for a lead service line
Lead reaches tap water mainly through service lines and household plumbing. Suppliers now publish an inventory identifying lead lines.
3
Flush before drinking
If water has sat in pipes more than six hours, run the cold tap for two minutes before drinking or cooking.

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