Is Stockton, MO Tap Water Safe to Drink?
Graded D, with 82 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
45.5/100
waterverge.com Stockton, MO — Water Quality Report
Stockton's drinking water received a grade of D (45.5 out of 100), indicating poor water quality. The city's 7 water systems serve approximately 2,701 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 271 violations on record, including 49 health-based violations. 82 remain unresolved.
What to know about Stockton's water
Stockton ranks #491 out of 509 cities in Missouri for water quality, placing it among the lowest-rated in the state.
Stockton 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, Stockton may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
The system has seen 118 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Stockton, MO water safe to drink?
Stockton's drinking water has significant quality concerns based on EPA testing data. With a grade of D (45.5/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 7 water systems serve approximately 2,701 residents using groundwater (wells).
Recent water quality updates for Stockton
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Stockton's water quality assessment. Grade: D (45.5/100).
Contaminants: Revised Total Coliform Rule.
Contaminants: Consumer Confidence Rule.
Contaminants: LEAD AND COPPER RULE REVISIONS, 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 Stockton's water supply.
Well within EPA limits.
Violation history
Stockton's water system has 271 total violations on record, including 49 health-based violations. 82 remain unresolved. 118 violations were issued in the last 5 years.
Flood & environmental risk
Cedar County has experienced 4 federally declared disasters since 2005. 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 Stockton Lake Near Stockton, Sac River Near Stockton, Sac River At Hwy J Below Stockton, Cedar Creek Near Pleasant View.
Where does Stockton's water come from?
Stockton's drinking water comes from groundwater (wells), supplied by 7 water systems serving approximately 2,701 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Stockton Lake Near Stockton (lake), Sac River Near Stockton (river), Sac River At Hwy J Below Stockton (river), Cedar Creek Near Pleasant View (river).
What Stockton residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Stockton'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.
Stockton'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
Cedar County has experienced 4 federally declared disasters since 2005. 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 Stockton compares by contaminant
Explore where Stockton ranks among all Missouri cities for specific contaminants.
Water source & infrastructure
Where Stockton's water comes from
Stockton'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 2,701 people through 7 water systems.
Water bodies near Stockton
Stockton is located near 4 notable water bodies. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Stockton
| System Name | PWSID | Population | Source |
|---|---|---|---|
| STOCKTON PWS | MO5010763 | 1,892 | GW |
| STOCKTON HILLS WATER CO | MO5036164 | 400 | GW |
| AGAPE LAND MANAGEMENT | MO5172802 | 250 | GW |
| VILLAGE OF UMBER VIEW HEIGHTS PWS | MO5010967 | 50 | GW |
| AIRPORT VILLAGE MHP | MO5238288 | 42 | GW |
| FRIENDSHIP HILLS SUBD | MO5031165 | 35 | GW |
| CHAPEL HILL SUBD | MO5190909 | 32 | GW |
How Stockton compares
Full Missouri rankings →Stockton's score of 45.5/100 is below the average of 62/100 among major Missouri cities. It outscores 4 of 10 nearby cities. 6 of 10 nearby cities score higher.
Nearby cities
View Missouri rankings →About Stockton, MO
Learn more about your water
Guides and resources related to Stockton's water quality findings.
Explore water quality across Cedar
Frequently asked questions
Is Stockton, MO tap water safe to drink?
Stockton's water quality earned a grade of D (45.5/100). Significant issues have been found. A water filter is strongly recommended. The city ranks #491 out of 509 cities tested in Missouri.
What contaminants are in Stockton's water?
Lead was measured at 2.1 ppb (90th percentile). 271 violations are on record.
How is Stockton'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 Stockton?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Stockton's water come from?
Stockton's water is sourced from Groundwater. The city has 7 water systems serving approximately 2,701 residents.
What health violations has Stockton's water system had?
Stockton has 49 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. 82 violations remain unresolved.
Is Stockton's groundwater at risk of contamination?
Stockton 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 271 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 Stockton's water compare to other cities?
Stockton ranks #491 out of 509 cities in Missouri (better than 4% of state cities) and #14148 out of 15744 cities nationally (10th percentile). The grade of D reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.