Lewiston, ME: 3 Violations — 68/100 (2026)
3 ZIP codes · 2 water systems · Updated 2026-06-03
Across water systems in Lewiston, safety results are uneven — a portion carry active or recent violations, while others meet federal standards without incident, placing the city in the middle tier for ME.
How Lewiston Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About Lewiston Water
- Your city's water systems recorded 3 violations in the past 5 years.
- Average lead level: 0.0023 mg/L.
- Estimated remediation: $2,600 per household.
- CDC health risk index: 13.83 — above typical levels.
Who Supplies Your Water in Lewiston
Throughout Lewiston, ME, water comes from one of 2 primary utilities out of 2 total systems — independent providers with different rate structures, infrastructure, and compliance records that vary across the service territory.
Overview
We track water quality and home safety data for 3 ZIP codes in Lewiston, Maine, covering 2 community water systems serving approximately 37,886 people.
3 of 3 ZIP codes (100%) have recorded EPA violations. All violations are monitoring/reporting type.
Home Safety Score
Average Home Safety Score for Lewiston: C (68/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Lewiston water systems draw from: Groundwater, Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0023 mg/L (EPA action level: 0.015 mg/L)
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 1 (High Risk)
- Zone 1 (High): 3 ZIP codes
- Zone 2 (Moderate): 0 ZIP codes
- Zone 3 (Low): 0 ZIP codes
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Consumer Confidence Report Rule | Reporting | 4 | 3 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 04240 | C | 1 | 0 | Lewiston Water & Sewer Division |
| 04241 | B | 1 | 0 | Lewiston Water & Sewer Division |
| 04243 | B | 1 | 0 | Lewiston Water & Sewer Division |
All ZIP Codes in Lewiston
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Updated daily.
Health Outcomes in Lewiston
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
Top Contaminants in Lewiston Water
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
Cost Context: What Remediation Means for Lewiston Homeowners
Middle of the range — Lewiston homeowners face a remediation share that calls for real financial attention without reaching crisis territory.
Remediation costs are moderate relative to home values in Lewiston. The estimated $1,733–$3,533 range is manageable for most homeowners but still worth budgeting for. Home values are 18% below the Maine average.
Lead Exposure Risk for Children in Lewiston
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
Lead risk in Lewiston appears low overall, but individual homes may differ. Testing is the only way to confirm your water's lead content.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Flood & Climate Risk in Lewiston
33 FEMA flood insurance claims are on file for Lewiston, and 100% of local ZIP codes fall within federally designated flood zones — enough to put flood exposure on the planning radar, though short of the concentrated-risk threshold where treatment-system vulnerability becomes a primary consideration.
Lewiston has a moderate flood history with 33 FEMA claims averaging $12,676 per payout. 100% of ZIP codes fall within FEMA flood zones. Flood events can contaminate drinking water and overwhelm treatment systems.
How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. Flood damage can add significantly to the estimated <strong>$2,600</strong> remediation cost per household.
Residents in flood-prone areas should consider flood insurance even outside FEMA zones — over 25% of flood claims come from low-to-moderate risk areas. After any flood event, test your water before drinking.
Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.
What You Can Do in Lewiston
- Test your water at home. City-level data shows averages — your tap may differ. NSF-certified test kits cost $20-40 and give results in days.
- Install a certified water filter. Filters rated for Consumer Confidence Report Rule can reduce the most common contaminant found in Lewiston's water.
- Check your home's plumbing. Homes built before 1986 may have lead solder in pipes. A licensed plumber can assess your risk.
Deep Dive Reports
Detailed analysis for Lewiston, ME