Is Jonesville, LA Tap Water Safe to Drink?
Graded C — but Lead was detected above EPA limits. Here's what's in the water and how to remove it. What to do next ↓
64.2/100
waterverge.com Jonesville, LA — Water Quality Report
Jonesville's drinking water received a grade of C (64.2 out of 100), indicating fair water quality. The city's 3 water systems serve approximately 6,579 residents using groundwater.
Lead levels were measured at 18.0 ppb (90th percentile), which exceeds the EPA action level of 15 ppb. This system has not yet been tested for PFAS under the EPA UCMR 5 program.
The system has 33 violations on record, including 16 health-based violations. 14 remain unresolved.
What to know about Jonesville's water
Jonesville ranks #165 out of 309 cities in Louisiana for water quality, placing it below average in the state.
Jonesville 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.
Lead levels exceed the EPA action level of 15 ppb, which typically indicates aging lead service lines or lead solder in the distribution system. An NSF 53-certified filter is strongly recommended for drinking and cooking water.
Water quality score
See methodology →Is Jonesville, LA water safe to drink?
Jonesville's drinking water has significant quality concerns based on EPA testing data. With a grade of C (64.2/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 3 water systems serve approximately 6,579 residents using groundwater (wells).
Recent water quality updates for Jonesville
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Jonesville's water quality assessment. Grade: C (64.2/100).
Contaminants: Consumer Confidence Rule.
Contaminants: Consumer Confidence Rule.
Contaminants: Lead and Copper Rule.
Key contaminant findings
Based on the most recent EPA sampling data for Jonesville's water supply.
Exceeds EPA action level. Lead service line replacement and point-of-use filtration recommended.
Violation history
Jonesville's water system has 33 total violations on record, including 16 health-based violations. 14 remain unresolved. 3 violations were issued in the last 5 years.
Where does Jonesville's water come from?
Jonesville's drinking water comes from groundwater (wells), supplied by 3 water systems serving approximately 6,579 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Ouachita River At Hwy 8 At Harrisonburg (river), Bushley Bayou Nr Harrisonburg (river), Black R @ Jonesville (river).
What Jonesville residents can do
Recommended: NSF 53-certified pitcher or under-sink filter. This addresses the specific contaminants found in Jonesville'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.
Run cold water for 30 seconds before drinking, especially in the morning. Lead and copper leach from household plumbing when water sits in pipes.
Data: EPA SDWIS, UCMR 5 (PFAS), FEMA, NOAA. Last updated May 2026.
Top contaminants to know
View all ↓Violation summary
Violations & advisories
Drought conditions
D3 — extreme droughtCatahoula Parish is currently in D3 (extreme 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.
Recommended water filters
Based on contaminants detected in Jonesville's water supply, we recommend the following filter types.
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. | 18.0 | 15 | ppb | Inorganic | Over Limit |
Lead level trend (90th percentile)
See how Jonesville compares by contaminant
Explore where Jonesville ranks among all Louisiana cities for specific contaminants.
Water source & infrastructure
Where Jonesville's water comes from
Jonesville'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 private ownership and serves approximately 6,579 people through 3 water systems.
Water bodies near Jonesville
Jonesville is located near 3 notable water bodies. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Jonesville
| System Name | PWSID | Population | Source |
|---|---|---|---|
| SANDY LAKE WATER SUPPLY | LA1025008 | 3,141 | GW |
| TOWN OF JONESVILLE WATER SYSTEM | LA1025006 | 2,811 | GW |
| WHITEHALL WATER SYSTEM INC | LA1059012 | 627 | GW |
How Jonesville compares
Full Louisiana rankings →Jonesville's score of 64.2/100 is above the average of 53/100 among major Louisiana cities. It outscores 7 of 10 nearby cities.
Nearby cities
View Louisiana rankings →About Jonesville, LA
Learn more about your water
Guides and resources related to Jonesville's water quality findings.
Explore water quality across Catahoula Parish
Frequently asked questions
Is Jonesville, LA tap water safe to drink?
Jonesville's water quality earned a grade of C (64.2/100). Some concerns have been identified. Consider a water filter for an extra layer of protection. The city ranks #165 out of 309 cities tested in Louisiana.
What contaminants are in Jonesville's water?
Lead was measured at 18.0 ppb (90th percentile). 33 violations are on record.
How is Jonesville'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 Jonesville?
Yes — lead levels exceed the EPA action level of 15 ppb. We recommend an NSF 53-certified filter or reverse osmosis system. Based on current data, basic filtration should suffice for additional peace of mind.
Where does Jonesville's water come from?
Jonesville's water is sourced from Groundwater. The city has 3 water systems serving approximately 6,579 residents.
What health violations has Jonesville's water system had?
Jonesville has 16 health-based violations on record. The most recent violation was recorded in July 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 14 violations remain unresolved.
Is Jonesville's groundwater at risk of contamination?
Jonesville 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 33 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 Jonesville's water compare to other cities?
Jonesville ranks #165 out of 309 cities in Louisiana (better than 47% of state cities) and #11678 out of 15744 cities nationally (26th percentile). The grade of C reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.