ZipCheckup grade for 42236: B.

This ZIP has a few items worth a quick check.

Your top priority: have older plumbing checked for lead solder. Check your ZIP → EPA: reduce lead

Water Quality Report
B 83

Herndon, KY (42236): 1 Violation Recorded for Mapped Water Systems - 83/100

EPA data combined for 4 water systems mapped to this ZIP (largest mapped system: Christian Company Water District)

PFAS Detected

EPA records for the water systems mapped to 42236 in Herndon, KY contain 1 recorded violations for inclusive record years 2021 through 2026, all mapped systems combined; 0 are marked health-based.

Data source: U.S. Environmental Protection Agency (EPA) SDWIS

Based on EPA Drinking Water FEMA Flood Data U.S. Census CDC Energy Information Admin. USGS Water Data & 9 more federal sources
Latest air quality, EPA records and weather alerts Current data temporarily unavailable
Current EPA violation data unavailable
Water records and current conditions
Current EPA violation data unavailable
Safety Score
B 83/100
Water Quality Concerns 1 non-health-based violation record in EPA data
Lead Risk Below action level Below the reporting limit, 90th percentile, sample period ending 2024-12-31
NFIP Claim History N/A
Data confidence: High (direct measurement) Medium (sampled / sub-geography) Low (modeled / inferred) Methodology →

At a Glance

  • Water EPA records for water systems mapped to this ZIP show 1 violation (non-health) (since 2021).
  • Lead The reported 90th-percentile lead result is below the laboratory reporting limit, not a measured zero; EPA's health goal for lead is zero.
  • PFAS PFAS detected in UCMR5 sampling; see the PFAS section for each compound, compared with the federal PFAS MCL where one exists.
  • Radon EPA Zone 2 - county-level radon potential, not a home measurement.
Contaminant Summary
Violations on record (not health-based)
1 violation PFAS detected
Report data assembled: Jul 27, 2026 EPA water-system identity: source date or period is not present in ZipCheckup's accepted source record EPA violation history: more than two update cycles old Lead, copper and UCMR measurements: source date or period is not present in ZipCheckup's accepted source record
B
ZIP-level Home Safety model score: 83 / 100
Home Safety Score higher than 67% of ZIP codes nationwide
4
Water Systems
17,248
People Served
0
Health Violations (since 2021)
Surface water
Water Source
Zone 2
County Radon Potential · Moderate
$120K
Median Home ValueState median: $131K

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Score Breakdown

Overall Home Safety Score: 83/100

This is the published model score. Component and domain values are shown independently; they are not added together on this page.

Canonical components

EPA water compliance
98/100
Observed
PFAS MCL screen
100/100
Observed
EPA radon zone
50/100
Observed
Annual EPA AirData AQI
100/100
Observed

Required domains

Drinking water
99/100
Indoor environment
50/100
Outdoor environment
100/100

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 42236 in Herndon, Kentucky is mapped to the water system Christian Company Water District (EPA ID: KY0240521). This system provides water to approximately 17,248 people from surface water sources.

There are 4 community water systems serving this area.

Water Systems Serving This Area

System Name EPA ID Population Source
Christian Company Water District KY0240521 17,248 Surface water
Hopkinsville Water Environment Authority KY0240201 41,350 Surface water
Barkley Lake Water District KY1110019 14,284 Surface water
Cadiz Municipal Water Company KY1110054 6,165 Surface water

Other Water Quality Reports in Kentucky

Nearby Water Quality Reports

Data Sources

This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Christian Company Water District (KY0240521) on EPA.gov.

3 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.

📊 EPA Safe Drinking Water · View source →

PFAS Contamination Detected

PFAS ("forever chemicals") have been reported in samples from water systems associated with ZIP code 42236.

Detected compounds: 6:2 FTS, PFHxA, PFPeA, PFBA.

Highest measured level: 0.023 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.

📊 EPA UCMR5 · View source →
Environmental Hazards (10) HIGH
Home & Infrastructure (6) MODERATE
Cost & Community (8) HIGH

CPSC product recall notices

These national notices are not matched to this ZIP code or water system.

View all recalls →

📊 CPSC · View source →

Protect Your Home in Herndon

Based on local data for ZIP 42236, 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 42236 was built around 1975. 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 Costs

Window Replacement

The median build year of homes in Herndon is 1975; 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 Costs

Roofing Inspection & Repair

Homes built around 1975 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 Needs

Service 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 42236 safe to drink?

EPA SDWIS records 1 violation since 2021 across the water systems mapped to ZIP 42236 (primary system: Christian Company Water District), 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 42236's water come from?

The recorded water source for Christian Company Water District, a system mapped to ZIP code 42236, is Surface water. This system serves approximately 17,248 people.

How does Herndon water compare to the national average?

Herndon's Home Safety Score ranks better than 67% of U.S. ZIP codes, and at or above 80% within Kentucky.

How can I get my water tested in Herndon?

If Christian Company Water District 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.

What is the radon risk for 42236?

42236 is mapped to a county in EPA Radon Zone 2 (moderate county-level radon potential; EPA recommends testing every home), located in Christian 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 42236's water?

Yes, PFAS have been detected in samples from water systems mapped to 42236. 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

APA ZipCheckup. (2026). Herndon, KY (42236): 1 Violation Recorded for Mapped Water Systems - 83/100. https://zipcheckup.com/report/42236/
BibTeX 
@misc{zipcheckup-report-42236,
  author = {{ZipCheckup}},
  title  = {{Herndon, KY (42236): 1 Violation Recorded for Mapped Water Systems - 83/100}},
  year   = {2026},
  url    = {https://zipcheckup.com/report/42236/}
}

Page version: October 2026.

Nearby ZIP Code Reports

Water quality comparison for ZIP codes near 42236

ZIP Code City, State Distance Grade Violations
42254 La Fayette, KY 4.4 mi N/A 1
42223 Fort Campbell, KY 9.0 mi C 0
42232 Gracey, KY 10.5 mi B 1
42262 Oak Grove, KY 10.6 mi B 1
37023 Big Rock, TN 11.9 mi C 6
42240 Hopkinsville, KY 12.6 mi B 1
42241 Hopkinsville, KY 12.6 mi N/A 0
37042 Clarksville, TN 13.5 mi B 10
42211 Cadiz, KY 13.8 mi N/A 0
37191 Woodlawn, TN 13.9 mi B 10

Contaminants Detected in 42236

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Overall safety breakdown

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Coverage: 13/17 risk factors Data sources →
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