Water Quality in Southwest Harbor, ME: 5 Violations - Grade N/A
1 water system · 1 directly mapped ZIP records
Available EPA records report 5 violations across 1 directly mapped ZIP records with known counts for Southwest Harbor. This is compliance evidence, not a property-level tap-water verdict.
Data: EPA Safe Drinking Water Information System (SDWIS)
Water Quality by ZIP Code in Southwest Harbor
This table shows typed EPA water evidence only. Missing violation counts are displayed as N/A, not zero.
| ZIP Code | Violations | Health | |
|---|---|---|---|
| 04679 | 5 | 0 | View report → |
Water Quality Overview
Southwest Harbor, Maine has directly mapped EPA water-system data for 1 ZIP codes. This page reports typed compliance facts and does not relabel the multi-source Home Safety Score as a drinking-water grade.
The available EPA records report 5 violations (all classified as monitoring/reporting type in the available record) across 1 directly mapped ZIP record with reported counts.
Lead Levels
The average 90th percentile lead level across Southwest Harbor water systems is 0.0021 mg/L - within EPA limits. No exceedances appear among the 1 ZIP records with known lead status.
With 68% of homes built before 1986, Southwest Harbor has a higher-than-average risk of lead from older plumbing. Lead solder was banned in 1986, and homes built before this date may have lead in pipes, solder joints, or fixtures.
Water Systems Serving Southwest Harbor
Southwest Harbor is served by 1 community water system regulated under the Safe Drinking Water Act. These systems collectively serve approximately 1,544 people across 1 ZIP code.
Each water system is identified by a Public Water System ID (PWSID) and is required to:
- Test for over 90 regulated contaminants on a regular schedule
- Report results to the EPA and state regulators
- Issue an annual Consumer Confidence Report (CCR) to all customers
- Take corrective action when violations occur
The EPA has taken 10 enforcement actions against water systems serving Southwest Harbor. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in Southwest Harbor
Enter your ZIP code on ZipCheckup to see your specific water system data, including contaminant levels and violation history
Request your CCR - your water utility must provide an annual Consumer Confidence Report with detailed test results for all monitored contaminants
Get a home test - certified kits cost $20–$50 and test for lead, bacteria, and common contaminants. Professional lab tests ($150–$400) cover a broader panel
Consider filtration - NSF-certified filters can remove specific contaminants. Reverse osmosis removes the broadest range; activated carbon is effective for chlorine and many organics
Check for advisories - monitor your local utility website and local news for boil water advisories or system alerts
Contaminants Detected in Southwest Harbor Water Systems
The following contaminants have been detected or caused violations across Southwest Harbor's water systems:
| Contaminant | Category | MCL | Violations | ZIPs Affected | Health-Based |
|---|---|---|---|---|---|
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 0.08 mg/L | 1 | 1 | No |
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 0.06 mg/L | 1 | 1 | No |
| Stage 1 DBP Rule | Treatment Technique | N/A | 1 | 1 | No |
| Surface Water Treatment Rule | Treatment Technique | N/A | 1 | 1 | No |
| Lead and Copper Rule | Treatment Technique | N/A | 1 | 1 | No |
MCL = Maximum Contaminant Level (EPA enforceable standard). Health-based violations indicate levels that may pose direct health risks.
EPA Enforcement History
The EPA and state regulators have taken 10 enforcement actions against water systems serving Southwest Harbor. Recent actions:
| Date | Action Type |
|---|---|
| 2024-02-20 | State Filed Judgment |
| 2023-04-18 | State Order Extension |
| 2023-03-13 | State Filed Judgment |
| 2022-10-18 | State Filed Judgment |
| 2022-10-18 | State Informal Enforcement |
| 2022-09-28 | State Order Extension |
| 2022-05-23 | State Order Extension |
| 2022-03-14 | State Filed Judgment |
| 2021-06-08 | State Informal Action |
| 2021-03-17 | State Order Extension |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2024-02-20.
Southwest Harbor vs. Nearby Maine Cities
How Southwest Harbor's water quality compares to similar cities in Maine:
| City | Direct EPA ZIPs | Violations | Systems | Population |
|---|---|---|---|---|
| Southwest Harbor | 1 | 5 | 1 | 1,544 |
| East Millinocket | 1 | 0 | 1 | 1,545 |
| Pownal | 0 | N/A | 0 | 1,551 |
| Ashland | 0 | N/A | 0 | 1,535 |
Common Questions About Southwest Harbor Water
These are the most common questions residents search for about water quality in Southwest Harbor, Maine:
Is Southwest Harbor water hard or soft? Water hardness varies by source. Southwest Harbor's 1 water system uses a single source. Check your ZIP code report for specific hardness data.
Can I drink Southwest Harbor tap water? City-level EPA records cannot determine safety at a specific tap. No health-based violations are recorded across 1 directly mapped ZIP records with known counts, but this is not a property-level safety guarantee.
What is the best water filter for Southwest Harbor? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Southwest Harbor vs. Maine Average
Understanding how Southwest Harbor compares to the broader Maine average helps contextualize your local water quality. Factors like water source, treatment methods, and infrastructure age all contribute to differences between cities in the same state.
To see how individual neighborhoods compare, check the ZIP code reports below - water quality can vary significantly even within Southwest Harbor.
ZIP Codes in Southwest Harbor
Southwest Harbor spans 1 ZIP code. EPA water-system coverage is available for 1 directly mapped ZIP code. Check each ZIP code for detailed contaminant data, violation history, and system information.
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
- Enforcement: EPA ECHO database
- Filter recommendations: NSF/ANSI certified products
Source reporting periods vary. See each cited source for its publication schedule.