Is Marston, MO Tap Water Safe to Drink?
Graded A, with 6 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
90.2/100
waterverge.com Marston, MO — Water Quality Report
Marston's drinking water received a grade of A (90.2 out of 100), indicating excellent water quality. The city's 1 water system serves approximately 503 residents using groundwater.
Lead levels were measured at 0.0 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 20 violations on record, including 2 health-based violations. 6 remain unresolved.
What to know about Marston's water
Marston ranks #86 out of 509 cities in Missouri for water quality, placing it above average in the state.
Marston 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, Marston may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Marston, MO water safe to drink?
Marston's drinking water has significant quality concerns based on EPA testing data. With a grade of A (90.2/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 503 residents using groundwater (wells).
Recent water quality updates for Marston
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Marston's water quality assessment. Grade: A (90.2/100).
Contaminants: Consumer Confidence Rule, Revised Total Coliform Rule.
Federal disaster declaration (FEMA DR-4435). Flood event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-4317). Flood event — may have impacted local water infrastructure.
Contaminants: Consumer Confidence Rule.
Contaminants: Public Notice.
Key contaminant findings
Based on the most recent EPA sampling data for Marston's water supply.
Well within EPA limits.
Violation history
Marston's water system has 20 total violations on record, including 2 health-based violations. 6 remain unresolved.
Flood & environmental risk
New Madrid County has experienced 6 federally declared disasters since 1993. 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 Mississippi River At New Madrid.
Where does Marston's water come from?
Marston's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 503 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Mississippi River At New Madrid (river).
What Marston residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Marston'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.
Marston'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 Marston
Industrial polluters nearby
Reported releases to surface water by facilities near Marston, ranked by pounds discharged annually.
Total reported releases to surface water: 876 lbs
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
ASSOCIATED ELECTRIC COOPERATIVE INC NEW MADRID POWER PLANT MARSTON, MO63866 | Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 809 | 1.1 mi |
SRG GLOBAL PORTAGEVILLE PORTAGEVILLE, MO63873 | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 67 | 8.4 mi |
HEARTLAND ASPHALT MATERIALS NEW MADRID, MO63869 | — | — | 5.2 mi |
MAGNITUDE 7 METALS LLC MARSTON, MO63866 | — | — | 1.6 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Drought conditions
D3 — extreme droughtNew Madrid County 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.
Flood & disaster history
New Madrid County has experienced 6 federally declared disasters since 1993. 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. | 0.0 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Marston compares by contaminant
Explore where Marston ranks among all Missouri cities for specific contaminants.
Water source & infrastructure
Where Marston's water comes from
Marston'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 503 people through 1 water system.
Water bodies near Marston
Marston is located near 1 notable water body. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Marston
| System Name | PWSID | Population | Source |
|---|---|---|---|
| MARSTON PWS | MO4010504 | 503 | GW |
How Marston compares
Full Missouri rankings →Marston's score of 90.2/100 is above the average of 62/100 among major Missouri cities. It outscores 10 of 10 nearby cities.
Nearby cities
View Missouri rankings →About Marston, MO
Learn more about your water
Guides and resources related to Marston's water quality findings.
Explore water quality across New Madrid
Frequently asked questions
Is Marston, MO tap water safe to drink?
Marston's water quality earned a grade of A (90.2/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #86 out of 509 cities tested in Missouri.
What contaminants are in Marston's water?
Lead was measured at 0.0 ppb (90th percentile). 20 violations are on record.
How is Marston'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 Marston?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Marston's water come from?
Marston's water is sourced from Groundwater. The city has 1 water system serving approximately 503 residents.
What health violations has Marston's water system had?
Marston has 2 health-based violations on record. The most recent violation was recorded in July 2020. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 6 violations remain unresolved.
Is Marston's groundwater at risk of contamination?
Marston 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 20 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 Marston's water compare to other cities?
Marston ranks #86 out of 509 cities in Missouri (better than 83% of state cities) and #2385 out of 15744 cities nationally (85th percentile). The grade of A reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Marston's small water system affect quality?
Marston's system serves approximately 503 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 20 violations on record.