ZipCheckup grade for 99320: C.

A mixed picture - some signals here are worth your attention.

Your top priority: use a filter certified to reduce PFAS; check which ones. Check your ZIP → EPA PFAS info

Water Quality Report
C 59

Benton City, WA (99320): PFAS Above 2029 MCL Level - 59/100

EPA data combined for 7 water systems mapped to this ZIP (largest mapped system: Benton City Water)

PFAS Detected

EPA records for the water systems mapped to 99320 in Benton City, WA contain 24 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
C 59/100
Water Quality PFAS above MCL 24 non-health-based violation records in EPA data
Lead Risk Below action level Below the reporting limit, 90th percentile, sample period ending 2023-12-31
NFIP Claim History Claim records 27 claims
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 24 violations (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 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.
  • Flood 27 cumulative NFIP claim records. Check the current FEMA map for a specific address.
Contaminant Summary
Violations on record (not health-based)
24 violations 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
C
ZIP-level Home Safety model score: 59 / 100
Bottom 18% of U.S. ZIP codes
7
Water Systems
5,626
People Served
0
Health Violations (since 2021)
Groundwater
Water Source
Zone 2
County Radon Potential · Moderate
$300K
Median Home Value29% below state median ($421K)

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Score Breakdown

Overall Home Safety Score: 59/100

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
52/100
Observed
PFAS MCL screen
0/100
Observed
EPA radon zone
50/100
Observed
Annual EPA AirData AQI
100/100
Observed

Required domains

Drinking water
26/100
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 99320 in Benton City, Washington is mapped to the water system Benton City Water (EPA ID: WA5305800). This system provides water to approximately 5,626 people from groundwater sources.

There are 7 community water systems serving this area.

Water Systems Serving This Area

System Name EPA ID Population Source
Benton City Water WA5305800 5,626 Groundwater
City of West Richland WA5394900 21,231 Surface water
Summit View Water System WA5303303 1,869 Groundwater
Great Basin Water Kiona WA5310724 520 Groundwater
Canyon Village Water System Inc. WA5305801 310 Groundwater

Other Water Quality Reports in Washington

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 Benton City Water (WA5305800) on EPA.gov.

4 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 99320. One or more compound results are above the level of a federal PFAS MCL with compliance required from 2029.

Detected compounds: PFHxS, PFOS, PFPeA, PFHxA, PFBS, PFPeS, PFOA.

Highest measured level: 0.0143 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 (11) MODERATE
Home & Infrastructure (7) MODERATE

Possible home maintenance concerns - talk to a local expert.

Call (855) 384-4856

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Cost & Community (9) 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 Benton City

Based on local data for ZIP 99320, these services may benefit homeowners in your area.

Based on local data for your area. Use the tools below to explore your options.

Home & Flood Insurance

The ZIP code for this report in Benton City has 27 FEMA flood claims on record. Standard homeowner policies don't cover flood damage - make sure you're protected.

Typical cost: Flood insurance: premiums vary by property and flood zone; request a quote

Check Your Flood Zone (Free)

FEMA flood map lookup - see if your property is in a flood zone

Free tip: Check your FEMA flood zone at msc.fema.gov (free lookup)

Gutter Installation & Repair

The median home in 99320 was built around 1980. 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 Benton City is 1980; 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

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 99320 safe to drink?

EPA SDWIS records 24 violations since 2021 across the water systems mapped to ZIP 99320 (primary system: Benton City Water), 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 99320's water come from?

The recorded water source for Benton City Water, a system mapped to ZIP code 99320, is Groundwater. This system serves approximately 5,626 people.

How does Benton City water compare to the national average?

Benton City's Home Safety Score ranks lower than 82% of U.S. ZIP codes, and lower than 85% of ZIP codes within Washington.

How can I get my water tested in Benton City?

If Benton City Water 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 99320?

99320 is mapped to a county in EPA Radon Zone 2 (moderate county-level radon potential; EPA recommends testing every home), located in Benton 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 99320's water?

Yes, PFAS have been detected in samples from water systems mapped to 99320. 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.

What does the NFIP claim history show for ZIP 99320?

FEMA records contain 27 flood insurance claims filed in ZIP code 99320; the recorded rated-zone value (the most frequent one if there are several claims) is A08, which is claims evidence and may differ from the current FEMA map zone for a property. Claim records do not establish current property risk. Review FEMA's map for the specific property.

How to cite this page

APA ZipCheckup. (2026). Benton City, WA (99320): PFAS Above 2029 MCL Level - 59/100. https://zipcheckup.com/report/99320/
BibTeX 
@misc{zipcheckup-report-99320,
  author = {{ZipCheckup}},
  title  = {{Benton City, WA (99320): PFAS Above 2029 MCL Level - 59/100}},
  year   = {2026},
  url    = {https://zipcheckup.com/report/99320/}
}

Page version: October 2026.

Nearby ZIP Code Reports

Water quality comparison for ZIP codes near 99320

ZIP Code City, State Distance Grade Violations
99353 West Richland, WA 6.2 mi B 22
99354 Richland, WA 9.3 mi C 0
99352 Richland, WA 9.9 mi C 39
99338 Kennewick, WA 13.9 mi C 39
99350 Prosser, WA 13.9 mi B 29
99336 Kennewick, WA 16.2 mi C 2
99337 Kennewick, WA 18.2 mi C 8
99301 Pasco, WA 18.6 mi B 54
99302 Pasco, WA 19.2 mi N/A 0
98930 Grandview, WA 20.4 mi B 25

Contaminants Detected in 99320

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Overall safety breakdown

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