Is Linn, MO Tap Water Safe to Drink?
Graded B+, with 4 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
84.9/100
waterverge.com Linn, MO — Water Quality Report
Linn's drinking water received a grade of B+ (84.9 out of 100), indicating good water quality. The city's 2 water systems serve approximately 4,300 residents using groundwater.
Lead levels were measured at 1.6 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 23 violations on record, including 8 health-based violations. 4 remain unresolved.
What to know about Linn's water
Linn ranks #229 out of 509 cities in Missouri for water quality, placing it mid-range in the state.
Linn 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.
The system has seen 10 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Linn, MO water safe to drink?
Linn's drinking water has significant quality concerns based on EPA testing data. With a grade of B+ (84.9/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 2 water systems serve approximately 4,300 residents using groundwater (wells).
Recent water quality updates for Linn
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Linn's water quality assessment. Grade: B+ (84.9/100).
Contaminants: Revised Total Coliform Rule.
Contaminants: Revised Total Coliform Rule.
Contaminants: Revised Total Coliform Rule.
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.
Key contaminant findings
Based on the most recent EPA sampling data for Linn's water supply.
Well within EPA limits.
Violation history
Linn's water system has 23 total violations on record, including 8 health-based violations. 4 remain unresolved. 10 violations were issued in the last 5 years.
Flood & environmental risk
Osage County has experienced 7 federally declared disasters since 1986. 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 Maries River At Westphalia, Gasconade River Near Rich Fountain.
Where does Linn's water come from?
Linn's drinking water comes from groundwater (wells), supplied by 2 water systems serving approximately 4,300 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Maries River At Westphalia (river), Gasconade River Near Rich Fountain (river).
What Linn residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Linn'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.
Linn'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
Flood & disaster history
Osage County has experienced 7 federally declared disasters since 1986. 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. | 1.6 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Linn compares by contaminant
Explore where Linn ranks among all Missouri cities for specific contaminants.
Water source & infrastructure
Where Linn's water comes from
Linn'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 4,300 people through 2 water systems.
Water bodies near Linn
Linn is located near 2 notable water bodies. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Linn
| System Name | PWSID | Population | Source |
|---|---|---|---|
| OSAGE COUNTY PWSD 3 | MO3024439 | 2,800 | GW |
| LINN PWS | MO3010470 | 1,500 | GW |
How Linn compares
Full Missouri rankings →Linn's score of 84.9/100 is above the average of 62/100 among major Missouri cities. It outscores 9 of 10 nearby cities.
Nearby cities
View Missouri rankings →About Linn, MO
Wikipedia →Linn is a city in and the county seat of Osage County, Missouri, United States. The population was 1,350 at the 2020 census. Linn is part of the Jefferson City, Missouri Metropolitan Area.
Learn more about your water
Guides and resources related to Linn's water quality findings.
Explore water quality across Osage
Frequently asked questions
Is Linn, MO tap water safe to drink?
Linn's water quality earned a grade of B+ (84.9/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #229 out of 509 cities tested in Missouri.
What contaminants are in Linn's water?
Lead was measured at 1.6 ppb (90th percentile). 23 violations are on record.
How is Linn'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 Linn?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Linn's water come from?
Linn's water is sourced from Groundwater. The city has 2 water systems serving approximately 4,300 residents.
What health violations has Linn's water system had?
Linn has 8 health-based violations on record. The most recent violation was recorded in June 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 4 violations remain unresolved.
Is Linn's groundwater at risk of contamination?
Linn 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 23 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 Linn's water compare to other cities?
Linn ranks #229 out of 509 cities in Missouri (better than 55% of state cities) and #5607 out of 15744 cities nationally (64th percentile). The grade of B+ reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.