Is Williamson, WV Tap Water Safe to Drink?
Graded D — but Chlorate was detected above EPA limits. Here's what's in the water and how to remove it. What to do next ↓
47.8/100
waterverge.com Williamson, WV — Water Quality Report
Williamson's drinking water received a grade of D (47.8 out of 100), indicating poor water quality. The city's 1 water system serves approximately 2,660 residents using surface water.
Lead levels were measured at 0.0 ppb (90th percentile), well within EPA limits. This system has not yet been tested for PFAS under the EPA UCMR 5 program.
The system has 148 violations on record, including 7 health-based violations. 27 remain unresolved.
What to know about Williamson's water
Williamson ranks #157 out of 248 cities in West Virginia for water quality, placing it below average in the state.
The city draws from surface water sources, which are more susceptible to seasonal runoff and agricultural contamination, requiring extensive multi-barrier treatment including coagulation, filtration, and disinfection.
Hexavalent chromium (chromium-6) was detected at 0.07 µg/L in UCMR 3 testing. While below California's 10 µg/L limit and with no federal MCL set, residents sensitive to this contaminant may consider reverse osmosis filtration.
As a small community water system, Williamson may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
The system has seen 20 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Williamson, WV water safe to drink?
Williamson's drinking water has significant quality concerns based on EPA testing data. With a grade of D (47.8/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 2,660 residents using surface water (rivers, lakes, or reservoirs).
Recent water quality updates for Williamson
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Williamson's water quality assessment. Grade: D (47.8/100).
Contaminants: Public Notice.
Contaminants: Interim Enhanced Surface Water Treatment Rule.
1 health-based. Contaminants: Interim Enhanced Surface Water Treatment Rule.
Federal disaster declaration (FEMA DR-4605). Flood event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-3358). Hurricane event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Williamson's water supply.
Well within EPA limits.
Violation history
Williamson's water system has 148 total violations on record, including 7 health-based violations. 27 remain unresolved. 20 violations were issued in the last 5 years.
Flood & environmental risk
Mingo County has experienced 10 federally declared disasters since 1974. Flooding and severe storms can overwhelm water treatment plants, cause sewage overflows, and introduce agricultural runoff, bacteria, and sediment into drinking water supplies. Local water sources include Tug Fork.
Where does Williamson's water come from?
Williamson's drinking water comes from surface water (rivers, lakes, or reservoirs), supplied by 1 water system serving approximately 2,660 people. Surface water sources are more susceptible to contamination from runoff, industrial discharge, and algal blooms, requiring extensive treatment. Nearby water bodies include Tug Fork (river).
What Williamson residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Williamson's water.
Your water utility is required to publish an annual Consumer Confidence Report (CCR) with detailed testing results. Ask for the latest copy or check your utility's website.
Williamson's area has a history of flooding. After severe weather, watch for boil water advisories from your local utility.
Data: EPA SDWIS, UCMR 5 (PFAS), FEMA, NOAA. Last updated May 2026.
Top contaminants to know
View all ↓Violation summary
Violations & advisories
Drought conditions
D2 — severe droughtMingo County is currently in D2 (severe drought) per the U.S. Drought Monitor (week of May 5, 2026). Drought can elevate disinfection-byproduct (TTHM/HAA5) levels and taste/odor issues as utilities draw from lower reservoirs.
Source: U.S. Drought Monitor, updated weekly by NDMC, USDA, and NOAA.
Flood & disaster history
Mingo County has experienced 10 federally declared disasters since 1974. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
Full contaminants report
| Contaminant | Detected Level | EPA Limit | Unit | Category | Status |
|---|---|---|---|---|---|
| Lead (90th percentile) LeadHeavy Metal A toxic heavy metal that can leach into drinking water from older pipes, solder, and fixtures. No amount of lead in water is considered safe. Health EffectsBrain and nervous system damage in children, kidney damage, high blood pressure, and reproductive problems in adults. EPA Limit15 ppb action level Common SourcesCorrosion of lead pipes, lead solder, brass faucets, and household plumbing. | 0.0 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Williamson compares by contaminant
Explore where Williamson ranks among all West Virginia cities for specific contaminants.
Water source & infrastructure
Where Williamson's water comes from
Williamson's drinking water comes primarily from surface water sources such as rivers, lakes, or reservoirs.
Surface water systems require multi-stage treatment including coagulation, sedimentation, filtration, and disinfection to meet EPA Safe Drinking Water Act standards.
These sources can be impacted by seasonal changes, stormwater runoff, upstream agriculture, and industrial discharge.
The system is operated by local government ownership and serves approximately 2,660 people through 1 water system.
Water bodies near Williamson
Williamson is located near 1 notable water body. As a surface water system, these water bodies may directly influence the city's drinking water supply.
Water systems serving Williamson
| System Name | PWSID | Population | Source |
|---|---|---|---|
| WILLIAMSON UTILITY BOARD | WV3303009 | 2,660 | SW |
How Williamson compares
Full West Virginia rankings →Williamson's score of 47.8/100 is below the average of 65/100 among major West Virginia cities. It outscores 3 of 10 nearby cities. 7 of 10 nearby cities score higher.
Nearby cities
View West Virginia rankings →About Williamson, WV
Learn more about your water
Guides and resources related to Williamson's water quality findings.
Explore water quality across Mingo
Frequently asked questions
Is Williamson, WV tap water safe to drink?
Williamson's water quality earned a grade of D (47.8/100). Significant issues have been found. A water filter is strongly recommended. The city ranks #157 out of 248 cities tested in West Virginia.
What contaminants are in Williamson's water?
Lead was measured at 0.0 ppb (90th percentile). 148 violations are on record.
How is Williamson's water quality grade calculated?
The grade is based on four factors: violation history (40%), lead and copper levels (25%), PFAS contamination (25%), and regulatory compliance (10%). The score is also adjusted based on how complete the available data is. See our methodology page for full details.
Do I need a water filter in Williamson?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Williamson's water come from?
Williamson's water is sourced from Surface water. The city has 1 water system serving approximately 2,660 residents.
What health violations has Williamson's water system had?
Williamson has 7 health-based violations on record. The most recent violation was recorded in September 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 27 violations remain unresolved.
How does Williamson's water compare to other cities?
Williamson ranks #157 out of 248 cities in West Virginia (better than 37% of state cities) and #13572 out of 15744 cities nationally (14th percentile). The grade of D reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Williamson's small water system affect quality?
Williamson's system serves approximately 2,660 residents. Small community water systems (under 3,300 people) may have fewer financial resources for infrastructure upgrades and advanced treatment technologies. However, they are held to the same EPA drinking water standards as larger systems. This system has 148 violations on record.