Water Quality in South Wellfleet, MA: 3 Violations — Grade C
Grade C · Score 68/100 · 1 water system · Updated 2026-05-03
South Wellfleet's water has moderate compliance issues. Residents in affected areas should consider filtration.
Data: EPA Safe Drinking Water Information System (SDWIS) Last verified: 2026-05-03
Drinking water compliance data for South Wellfleet, MA reflects 3 EPA violations — details in the grid below.
Water Quality by ZIP Code in South Wellfleet
Water quality varies across South Wellfleet's 1 ZIP codes. Check your specific ZIP for detailed contaminant data.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 02663 | C | 68 | 3 | 0 | View report → |
Water Quality Overview
South Wellfleet, Massachusetts receives a water quality grade of C with an overall score of 68 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
The 1 water system serving South Wellfleet have accumulated 3 EPA violations (all monitoring/reporting type). These violations are tracked across 1 ZIP codes serving approximately 120 people.
What Grade C Means
A grade of C indicates moderate compliance issues. South Wellfleet's water systems have some violations that warrant attention. While the water may still be safe for most people, residents in affected ZIP codes should consider additional testing or filtration.
Lead Levels
The average 90th percentile lead level across South Wellfleet water systems is 0.0093 mg/L — within EPA limits. No ZIP codes exceed the EPA lead action level.
With 76% of homes built before 1986, South Wellfleet 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.
Radon Risk
South Wellfleet is in EPA Radon Zone 2 (Moderate risk). Testing is recommended, especially for homes with basements or ground-level living spaces.
Water Systems Serving South Wellfleet
South Wellfleet is served by 1 community water system regulated under the Safe Drinking Water Act. These systems collectively serve approximately 120 people across 1 ZIP codes.
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 4 enforcement actions against water systems serving South Wellfleet. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in South Wellfleet
Enter your ZIP code on ZipCheckup to see your specific water system data, including contaminant levels, violation history, and safety scores
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
EPA Enforcement History
The EPA and state regulators have taken 4 enforcement actions against water systems serving South Wellfleet. Recent actions:
| Date | Action Type |
|---|---|
| 2025-11-05 | State Filed Suit |
| 2025-02-05 | State Order Extension |
| 2025-01-31 | State Filed Suit |
| 2021-03-05 | State Order Extension |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2025-11-05.
South Wellfleet vs. Nearby Massachusetts Cities
How South Wellfleet's water quality compares to similar cities in Massachusetts:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| South Wellfleet | C | 3 | 1 | 120 |
| Florence | C | 0 | 1 | 120 |
| Hubbardston | C | 1 | 3 | 120 |
| Leeds | B | 0 | 1 | 120 |
Common Questions About South Wellfleet Water
These are the most common questions residents search for about water quality in South Wellfleet, Massachusetts:
Is South Wellfleet water hard or soft? Water hardness varies by source. South Wellfleet's 1 water system uses a single source. Check your ZIP code report for specific hardness data.
Can I drink South Wellfleet tap water? South Wellfleet's water receives a grade of C (68/100). No health-based violations have been recorded, but home testing is always recommended.
What is the best water filter for South Wellfleet? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
South Wellfleet vs. Massachusetts Average
Understanding how South Wellfleet compares to the broader Massachusetts 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 South Wellfleet.
ZIP Codes in South Wellfleet
South Wellfleet spans 1 ZIP code. The ZIP with the lowest water quality score is 02663. Each ZIP code has its own water quality profile based on the specific water system serving that area. 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
Updated daily.