South Dennis, MA Home Safety: Home Safety 83/100
1 ZIP code · 1 water system · Updated
ZipCheckup grade for South Dennis: B.
This ZIP has a few items worth a quick check.
Tap water system records for South Dennis, MA support a high grade on this site; review your own system's entries for specifics.
How South Dennis Compares
Data: EPA SDWIS
Key Facts for South Dennis Residents
- Homes built before 1986: 78% - older plumbing may contain lead solder.
- Estimated remediation: $500 per household.
- Health risk index (ZipCheckup composite of CDC data): 12.93.
South Dennis's Water Providers
Only a single entry appears in the water system list for South Dennis, MA; federal records tie 1 to the area.
- B
Overview
We track home safety data for 1 ZIP code in South Dennis, Massachusetts (population ~6,767), covering 1 community water system serving approximately 65,000 people region-wide. The EPA snapshots used for this build directly map water systems to 1 of 1 ZIP codes.
The available EPA record reports 0 violations for 1 ZIP code with a reported violation count.
Home Safety Score
Average Home Safety Score for South Dennis: B (83/100)
Model 4.0.0 uses four measured components across three equally weighted domains. If a required domain is unavailable, no score is published:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| PFAS MCL Screen | UCMR 5 testing against the covered federal MCLs |
| Radon Risk | EPA radon zone classification |
| Annual AQI | EPA AirData county-year median with at least 90 observed days |
Water Sources
South Dennis water systems draw from: Groundwater.
Lead & Copper
- Average of reported 90th-percentile lead results: reported as 0 mg/L (a reported 0 is not proof of no lead; check the source record for its reporting limit) (EPA action level: 0.015 mg/L)
- 0 of 1 ZIP code with known status exceed the EPA lead action level
Radon Risk
1 of 1 ZIP records with known zones is in EPA Radon Zone 2.
The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 02660 | B | Dennis Water District | 65,000 |
All ZIP Codes in South Dennis
- 02660 [B]
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
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.
South Dennis Community Health Snapshot
Source: CDC PLACES (County-level estimates). County health indicators are shown for context only and are not linked to this area's water records.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
South Dennis Infrastructure Age
With 78% of homes built before 1986, lead solder in plumbing is a potential concern. Federal law banned lead solder in drinking-water plumbing in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Ask the water utility whether your address in South Dennis has a lead service line; its inventory can answer what a median build year of 1974 cannot.
Over half of homes in South Dennis were built before 1986, when federal law began restricting lead solder in drinking-water plumbing. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.
Source: U.S. Census Bureau ACS B25034.
How Remediation Costs Compare in South Dennis
The remediation-to-value ratio for South Dennis sits at the bottom of the scale.
Estimated remediation costs in South Dennis can be compared with local home values. The $300–$800 estimated range can be set against the median property value; actual costs vary by home. Home values are 11% below the Massachusetts average.
South Dennis: Lead Risk & Vulnerable Populations
Why children are most at risk: The CDC states that no safe blood lead level in children has been identified. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
If you have young children or are pregnant, consider testing your home's water - especially if your home was built before 1986.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
South Dennis: NFIP Claim Records and Water-Quality Context
Historical NFIP data for South Dennis contains 12 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $2,170. Among ZIP codes with claim records, 100% have an A- or V-family dominant rated zone recorded in those historical claims. This is not a complete current FEMA property-map inventory.
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. The $500 remediation estimate shown here excludes flood insurance and is not derived from NFIP claim count.
Claim count does not establish current property risk. Check the exact address in FEMA's current map and obtain a property-specific insurance quote when relevant.
Source: historical FEMA National Flood Insurance Program (NFIP) claim records. No current FEMA property-map designation is asserted.
Deep Dive Reports
Detailed analysis for South Dennis, MA