Is Cassville, MO Tap Water Safe to Drink?
Graded A-, with 2 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
86.6/100
waterverge.com Cassville, MO — Water Quality Report
Cassville's drinking water received a grade of A- (86.6 out of 100), indicating good water quality. The city's 1 water system serves approximately 3,290 residents using groundwater.
Lead levels were measured at 2.1 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 2 violations on record, including 0 health-based violations. 2 remain unresolved.
What to know about Cassville's water
Cassville ranks #185 out of 509 cities in Missouri for water quality, placing it mid-range in the state.
Cassville relies on groundwater, which is generally less vulnerable to surface contamination but can be affected by naturally occurring minerals like arsenic and nitrate, as well as agricultural and industrial runoff.
As a small community water system, Cassville may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Cassville, MO water safe to drink?
Cassville's tap water meets most EPA standards but has areas that warrant attention. With a grade of A- (86.6/100), some contaminant levels or compliance issues suggest that residents may benefit from additional filtration. The city's 1 water system serves approximately 3,290 residents using groundwater (wells).
Recent water quality updates for Cassville
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Cassville's water quality assessment. Grade: A- (86.6/100).
Federal disaster declaration (FEMA DR-4317). Flood event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-4250). Flood event — may have impacted local water infrastructure.
Contaminants: Consumer Confidence Rule.
Key contaminant findings
Based on the most recent EPA sampling data for Cassville's water supply.
Well within EPA limits.
Violation history
Cassville's water system has 2 total violations on record, including 0 health-based violations. 2 remain unresolved.
Flood & environmental risk
Barry County has experienced 6 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 Roaring River At Roaring River State Park.
Where does Cassville's water come from?
Cassville's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 3,290 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Roaring River At Roaring River State Park (river).
What Cassville residents can do
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.
Cassville'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
Top industrial polluters within 10 miles of Cassville
Industrial polluters nearby
Reported releases to surface water by facilities near Cassville, ranked by pounds discharged annually.
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
GEORGE'S PROCESSING INC OF MISSOURI CASSVILLE, MO65625 | — | — | 5.4 mi |
WILLOW BROOK FOODS PURDY, MO65734 | — | — | 6.2 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Flood & disaster history
Barry County has experienced 6 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. | 2.1 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Cassville compares by contaminant
Explore where Cassville ranks among all Missouri cities for specific contaminants.
Water source & infrastructure
Where Cassville's water comes from
Cassville's drinking water is drawn from underground aquifers through wells.
Groundwater is naturally filtered through rock and soil layers, generally requiring less treatment than surface water. However, it can contain naturally occurring contaminants like arsenic, radon, and minerals.
Agricultural activity, septic systems, and industrial operations near well fields can introduce nitrates, pesticides, and volatile organic compounds.
The system is operated by local government ownership and serves approximately 3,290 people through 1 water system.
Water bodies near Cassville
Cassville is located near 1 notable water body. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Cassville
| System Name | PWSID | Population | Source |
|---|---|---|---|
| CASSVILLE PWS | MO5010144 | 3,290 | GW |
How Cassville compares
Full Missouri rankings →Cassville's score of 86.6/100 is above the average of 62/100 among major Missouri cities. It outscores 9 of 10 nearby cities.
Nearby cities
View Missouri rankings →About Cassville, MO
Wikipedia →Cassville is a city in Flat Creek Township, Barry County, Missouri, United States, that is the county seat of Barry County. According to the 2020 census, the population of Cassville was 3,186. Cassville is one of the primary markets and job centers for an estimated 14,000 people living in the surrounding area.
Learn more about your water
Guides and resources related to Cassville's water quality findings.
Explore water quality across Barry
Frequently asked questions
Is Cassville, MO tap water safe to drink?
Cassville's water quality earned a grade of A- (86.6/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #185 out of 509 cities tested in Missouri.
What contaminants are in Cassville's water?
Lead was measured at 2.1 ppb (90th percentile). 2 violations are on record.
How is Cassville'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 Cassville?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Cassville's water come from?
Cassville's water is sourced from Groundwater. The city has 1 water system serving approximately 3,290 residents.
Is Cassville's groundwater at risk of contamination?
Cassville uses groundwater, which can be affected by naturally occurring contaminants like arsenic, radon, and nitrate, as well as agricultural runoff and industrial activity. The system has 2 violations on record that may relate to groundwater quality. Groundwater systems are generally less susceptible to surface contamination but should be monitored for emerging contaminants like PFAS.
How does Cassville's water compare to other cities?
Cassville ranks #185 out of 509 cities in Missouri (better than 64% of state cities) and #4591 out of 15744 cities nationally (71th percentile). The grade of A- reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Cassville's small water system affect quality?
Cassville's system serves approximately 3,290 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 2 violations on record.