Is La Grange, MO Tap Water Safe to Drink?
Graded B+, with 5 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
83.4/100
waterverge.com La Grange, MO — Water Quality Report
La Grange's drinking water received a grade of B+ (83.4 out of 100), indicating good water quality. The city's 1 water system serves approximately 874 residents using groundwater.
Lead levels were measured at 1.8 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 17 violations on record, including 5 health-based violations. 5 remain unresolved.
What to know about La Grange's water
La Grange ranks #267 out of 509 cities in Missouri for water quality, placing it below average in the state.
La Grange 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, La Grange may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is La Grange, MO water safe to drink?
La Grange's drinking water has significant quality concerns based on EPA testing data. With a grade of B+ (83.4/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 874 residents using groundwater (wells).
Recent water quality updates for La Grange
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into La Grange's water quality assessment. Grade: B+ (83.4/100).
Contaminants: Public Notice.
1 health-based. Contaminants: TTHM, Groundwater Rule.
1 health-based. Contaminants: TTHM.
Key contaminant findings
Based on the most recent EPA sampling data for La Grange's water supply.
Well within EPA limits.
Violation history
La Grange's water system has 17 total violations on record, including 5 health-based violations. 5 remain unresolved. 3 violations were issued in the last 5 years.
Where does La Grange's water come from?
La Grange's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 874 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate.
What La Grange residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in La Grange'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.
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 La Grange
Industrial polluters nearby
Reported releases to surface water by facilities near La Grange, ranked by pounds discharged annually.
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
GATESAIR QUINCY, IL62305 | — | — | 9.6 mi |
MIDWEST PATTERNS INC. QUINCY, IL62305 | — | — | 6.8 mi |
MANCHESTER TANK & EQUIPMENT QUINCY, IL62301 | — | — | 9.7 mi |
TITAN WHEEL CORP OF ILLINOIS QUINCY, IL62301 | — | — | 9.8 mi |
THE KNAPHEIDE MANUFACTURING CO QUINCY, IL62305 | — | — | 8.7 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
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. | 1.8 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how La Grange compares by contaminant
Explore where La Grange ranks among all Missouri cities for specific contaminants.
Water source & infrastructure
Where La Grange's water comes from
La Grange'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 874 people through 1 water system.
Water systems serving La Grange
| System Name | PWSID | Population | Source |
|---|---|---|---|
| LAGRANGE PWS | MO2010440 | 874 | GW |
How La Grange compares
Full Missouri rankings →La Grange's score of 83.4/100 is above the average of 62/100 among major Missouri cities. It outscores 9 of 10 nearby cities.
Nearby cities
View Missouri rankings →About La Grange, MO
Learn more about your water
Guides and resources related to La Grange's water quality findings.
Explore water quality across Lewis
Frequently asked questions
Is La Grange, MO tap water safe to drink?
La Grange's water quality earned a grade of B+ (83.4/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #267 out of 509 cities tested in Missouri.
What contaminants are in La Grange's water?
Lead was measured at 1.8 ppb (90th percentile). 17 violations are on record.
How is La Grange'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 La Grange?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does La Grange's water come from?
La Grange's water is sourced from Groundwater. The city has 1 water system serving approximately 874 residents.
What health violations has La Grange's water system had?
La Grange has 5 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. 5 violations remain unresolved.
Is La Grange's groundwater at risk of contamination?
La Grange 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 17 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 La Grange's water compare to other cities?
La Grange ranks #267 out of 509 cities in Missouri (better than 48% of state cities) and #6465 out of 15744 cities nationally (59th percentile). The grade of B+ reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does La Grange's small water system affect quality?
La Grange's system serves approximately 874 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 17 violations on record.