Is Otterville, MO Tap Water Safe to Drink?
Graded B+, with 18 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
81.9/100
waterverge.com Otterville, MO — Water Quality Report
Otterville's drinking water received a grade of B+ (81.9 out of 100), indicating good water quality. The city's 2 water systems serve approximately 510 residents using groundwater.
Lead levels were measured at 0.5 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 133 violations on record, including 22 health-based violations. 18 remain unresolved.
What to know about Otterville's water
Otterville ranks #298 out of 509 cities in Missouri for water quality, placing it below average in the state.
Otterville 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, Otterville may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Otterville, MO water safe to drink?
Otterville's drinking water has significant quality concerns based on EPA testing data. With a grade of B+ (81.9/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 2 water systems serve approximately 510 residents using groundwater (wells).
Recent water quality updates for Otterville
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Otterville's water quality assessment. Grade: B+ (81.9/100).
Contaminants: Revised Total Coliform Rule.
Contaminants: Revised Total Coliform Rule.
1 health-based. Contaminants: Stage 1 Disinfectants and Disinfection Byproducts Rule.
Federal disaster declaration (FEMA DR-3374). Flood event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-4012). Flood event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Otterville's water supply.
Well within EPA limits.
Violation history
Otterville's water system has 133 total violations on record, including 22 health-based violations. 18 remain unresolved. 2 violations were issued in the last 5 years.
Flood & environmental risk
Cooper County has experienced 7 federally declared disasters since 1973. 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 Lamine River Near Otterville.
Where does Otterville's water come from?
Otterville's drinking water comes from groundwater (wells), supplied by 2 water systems serving approximately 510 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Lamine River Near Otterville (river).
What Otterville residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Otterville'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.
Otterville'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 Otterville
Industrial polluters nearby
Reported releases to surface water by facilities near Otterville, ranked by pounds discharged annually.
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
JBS LIVE PORK SMITHTON FEED MILL SMITHTON, MO65350 | — | — | 5.0 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Flood & disaster history
Cooper County has experienced 7 federally declared disasters since 1973. 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. | 0.5 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Otterville compares by contaminant
Explore where Otterville ranks among all Missouri cities for specific contaminants.
Water source & infrastructure
Where Otterville's water comes from
Otterville'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 510 people through 2 water systems.
Water bodies near Otterville
Otterville is located near 1 notable water body. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Otterville
| System Name | PWSID | Population | Source |
|---|---|---|---|
| OTTERVILLE PWS | MO3010614 | 450 | GW |
| J&M MHP CAPITAL LLC | MO3048289 | 60 | GW |
How Otterville compares
Full Missouri rankings →Otterville's score of 81.9/100 is above the average of 62/100 among major Missouri cities. It outscores 8 of 10 nearby cities.
Nearby cities
View Missouri rankings →About Otterville, MO
Learn more about your water
Guides and resources related to Otterville's water quality findings.
Explore water quality across Cooper
Frequently asked questions
Is Otterville, MO tap water safe to drink?
Otterville's water quality earned a grade of B+ (81.9/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #298 out of 509 cities tested in Missouri.
What contaminants are in Otterville's water?
Lead was measured at 0.5 ppb (90th percentile). 133 violations are on record.
How is Otterville'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 Otterville?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Otterville's water come from?
Otterville's water is sourced from Groundwater. The city has 2 water systems serving approximately 510 residents.
What health violations has Otterville's water system had?
Otterville has 22 health-based violations on record. The most recent violation was recorded in November 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 18 violations remain unresolved.
Is Otterville's groundwater at risk of contamination?
Otterville 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 133 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 Otterville's water compare to other cities?
Otterville ranks #298 out of 509 cities in Missouri (better than 41% of state cities) and #7276 out of 15744 cities nationally (54th percentile). The grade of B+ reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.