ZipCheckup grade for 06239: C.
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Danielson, CT (06239): PFAS Detected in Mapped Water Systems - 67/100
EPA data combined for 3 water systems mapped to this ZIP (largest mapped system: Ctwc - Crystal System)
EPA records for the water systems mapped to 06239 in Danielson, CT contain zero recorded violations for inclusive record years 2021 through 2026. This does not establish that every category was monitored or published, and it does not cover events outside that source window.
Data source: U.S. Environmental Protection Agency (EPA) SDWIS
At a Glance
- Water No drinking-water violations in EPA records since 2021.
- Lead The reported 90th-percentile lead result of 0.0005 mg/L is below the EPA action level for water systems; EPA's health goal for lead is zero.
- PFAS At least one PFAS result is above an EPA MCL value (UCMR5 sampling; MCL compliance required from 2029).
- Radon EPA Zone 2 - county-level radon potential, not a home measurement.
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Read the card below - it documents the sole critical-level finding on file for Danielson (06239), with the high-priority tier of the same safety record returning zero results.
Score Breakdown
Overall Home Safety Score: 67/100
This is the published model score. Component and domain values are shown independently; they are not added together on this page.
Canonical components
Required domains
Coverage: 4 of 4 components and 3 of 3 domains observed.
Model 4.0.0; series home-safety-v4-cross-vertical.
Safety & Health (7) HIGH
Your Water System
ZIP code 06239 in Danielson, Connecticut is mapped to the water system Ctwc - Crystal System (EPA ID: CT0690011). This system provides water to approximately 6,378 people from groundwater sources.
There are 3 community water systems serving this area.
Water Systems Serving This Area
| System Name | EPA ID | Population | Source |
|---|---|---|---|
| Ctwc - Crystal System | CT0690011 | 6,378 | Groundwater |
| Ctwc - Plainfield System | CT1090081 | 1,713 | Groundwater |
| Ctwc - Gallup System | CT1090031 | 2,538 | Groundwater |
Other Water Quality Reports in Connecticut
- 06001 (Avon) - 2 violations recorded for mapped water systems
- 06002 (Bloomfield) - 44 violations recorded for mapped water systems
- 06006 (Windsor)
- 06010 (Bristol) - 7 violations recorded for mapped water systems
- 06011 (Bristol)
- 06013 (Burlington) - 2 violations recorded for mapped water systems
- 06016 (Broad Brook) - 2 violations recorded for mapped water systems
- 06018 (Canaan) - 3 violations recorded for mapped water systems
- 06019 (Canton)
- 06020 (Canton Center)
- 06021 (Colebrook)
- 06022 (Collinsville)
- 06023 (East Berlin) - 36 violations recorded for mapped water systems
- 06024 (East Canaan) - 3 violations recorded for mapped water systems
- 06025 (East Glastonbury)
- 06026 (East Granby) - 23 violations recorded for mapped water systems
- 06027 (East Hartland)
- 06028 (East Windsor Hill)
- 06029 (Ellington) - 1 violation recorded for mapped water systems
- 06030 (Farmington)
Nearby Water Quality Reports
- 06263 (Rogers) - 3 mi
- 06241 (Dayville) - 4 mi
- 06234 (Brooklyn) - 4 mi
- 06387 (Wauregan) - 4 mi
- 06243 (East Killingly) - 5 mi
- 06354 (Moosup) - 5 mi
- 06332 (Central Village) - 5 mi
- 06233 (Ballouville) - 6 mi
- 06377 (Sterling) - 7 mi
- 06259 (Pomfret Center) - 7 mi - 5 violations recorded for mapped water systems
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Ctwc - Crystal System (CT0690011) on EPA.gov.
5 of the top compounds applied across the surrounding county in USGS pesticide-use estimates appear on EPA drinking-water monitoring lists. See the agricultural pesticide-use section.
PFAS Contamination Detected
PFAS ("forever chemicals") have been reported in samples from water systems associated with ZIP code 06239. One or more compound results are above the level of a federal PFAS MCL with compliance required from 2029.
Detected compounds: PFOA, PFOS, PFHxS, PFBS.
Highest measured level: 0.0099 µg/L
Reverse osmosis (RO) and activated carbon block filters can reduce PFAS at the tap. Certifications list the compounds covered: an NSF/ANSI 53 or 58 claim for PFOA/PFOS does not cover every PFAS, so check that the product lists the compounds detected here.
Environmental Hazards (9) MODERATE
Home & Infrastructure (8) MODERATE
Possible home maintenance concerns - talk to a local expert.
Call (855) 384-4856Paid Partner This is a free service. You will be connected with an independent service provider. We may receive compensation.
Cost & Community (9) HIGH
CPSC product recall notices
These national notices are not matched to this ZIP code or water system.
Protect Your Home in Danielson
Based on local data for ZIP 06239, these services may benefit homeowners in your area.
Based on local data for your area. Use the tools below to explore your options.
Gutter Installation & Repair
The median home in 06239 was built around 1968. Aging gutters can cause foundation damage, basement flooding, and mold - a professional assessment can prevent costly repairs.
Typical cost: Gutter installation: typically $1,000–$2,500 for a standard home
Estimate Your Home Maintenance CostsWindow Replacement
The median build year of homes in Danielson is 1968; check the age and condition of your own windows. ENERGY STAR windows can save $101–$583/year on energy bills.
Typical cost: Window replacement: typically $300–$800 per window installed
Estimate Your Home Maintenance CostsRoofing Inspection & Repair
Homes built around 1968 may be on their second or third roof. A professional inspection can catch damage before leaks start.
Typical cost: Roof inspection: typically $75–$300; repairs $300–$1,500
Estimate Your Home Insurance NeedsService recommendations are based on public data for this ZIP code (FEMA, Census ACS, NWS). Actual needs vary by property. By calling, your information will be shared with an independent service provider. ZipCheckup may receive compensation. Cost estimates are approximate and vary by property, condition, and contractor.
Frequently Asked Questions
Is the tap water in 06239 safe to drink?
EPA SDWIS records 0 violations since 2021 across the water systems mapped to ZIP 06239 (primary system: Ctwc - Crystal System), including 0 health-based. The violation table above shows which system each record belongs to. ZipCheckup last updated this page in July 2026. The federal source release date is unavailable, so that month is not presented as source currency.
Where does 06239's water come from?
The recorded water source for Ctwc - Crystal System, a system mapped to ZIP code 06239, is Groundwater. This system serves approximately 6,378 people.
How does Danielson water compare to the national average?
Danielson's Home Safety Score ranks lower than 65% of U.S. ZIP codes, and at or above 61% within Connecticut.
How can I get my water tested in Danielson?
If Ctwc - Crystal System supplies your home, contact it for its Consumer Confidence Report; otherwise contact the water utility that serves your address, or hire a certified lab for independent home water testing. The EPA recommends annual testing if you use a private well.
Is lead a concern in 06239 tap water?
The Lead and Copper Rule record selected for 06239 reports a 90th-percentile lead result of 0.0005 mg/L for a water system mapped to this ZIP (record date 2025-12-31). The EPA action level is 0.015 mg/L. This result is below the EPA action level; it does not show the lead level in each home.
What is the radon risk for 06239?
06239 is mapped to a county in EPA Radon Zone 2 (moderate county-level radon potential; EPA recommends testing every home), located in Windham County. EPA radon zones range from Zone 1 (highest county-level potential) to Zone 3 (lowest). Testing your home is recommended regardless of zone.
Are there PFAS (forever chemicals) in 06239's water?
Yes, PFAS have been detected in samples from water systems mapped to 06239. One or more PFAS results are above the level of a federal PFAS MCL with compliance required from 2029. Reverse osmosis and activated carbon filters certified to NSF/ANSI 53 or 58 specifically for PFOA/PFOS reduction can reduce PFAS.
How to cite this page
ZipCheckup. (2026). Danielson, CT (06239): PFAS Detected in Mapped Water Systems - 67/100. https://zipcheckup.com/report/06239/
@misc{zipcheckup-report-06239,
author = {{ZipCheckup}},
title = {{Danielson, CT (06239): PFAS Detected in Mapped Water Systems - 67/100}},
year = {2026},
url = {https://zipcheckup.com/report/06239/}
}
Page version: October 2026.
Nearby ZIP Code Reports
Water quality comparison for ZIP codes near 06239
| ZIP Code | City, State | Distance | Grade | Violations |
|---|---|---|---|---|
| 06263 | Rogers, CT | 3.1 mi | C | 0 |
| 06241 | Dayville, CT | 3.9 mi | C | 0 |
| 06234 | Brooklyn, CT | 4.0 mi | C | 0 |
| 06387 | Wauregan, CT | 4.1 mi | N/A | 0 |
| 06243 | East Killingly, CT | 5.2 mi | N/A | 0 |
| 06354 | Moosup, CT | 5.3 mi | N/A | 0 |
| 06332 | Central Village, CT | 5.4 mi | N/A | 0 |
| 06233 | Ballouville, CT | 5.5 mi | N/A | 0 |
| 06377 | Sterling, CT | 6.5 mi | N/A | 0 |
| 06259 | Pomfret Center, CT | 7.2 mi | N/A | 5 |
Nearby ZIP Code Reports
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