Is Granby, MO Tap Water Safe to Drink?
Graded A, with 2 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
91.1/100
waterverge.com Granby, MO — Water Quality Report
Granby's drinking water received a grade of A (91.1 out of 100), indicating excellent water quality. The city's 1 water system serves approximately 2,034 residents using groundwater.
Lead levels were measured at 2.7 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 11 violations on record, including 3 health-based violations. 2 remain unresolved.
What to know about Granby's water
Granby ranks #64 out of 509 cities in Missouri for water quality, placing it above average in the state.
Granby 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, Granby may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Granby, MO water safe to drink?
Granby's tap water meets most EPA standards but has areas that warrant attention. With a grade of A (91.1/100), some contaminant levels or compliance issues suggest that residents may benefit from additional filtration. The city's 1 water system serves approximately 2,034 residents using groundwater (wells).
Recent water quality updates for Granby
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Granby's water quality assessment. Grade: A (91.1/100).
Contaminants: LEAD AND COPPER RULE REVISIONS.
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 Granby's water supply.
Well within EPA limits.
Violation history
Granby's water system has 11 total violations on record, including 3 health-based violations. 2 remain unresolved. 3 violations were issued in the last 5 years.
Flood & environmental risk
Newton County has experienced 7 federally declared disasters since 1974. Flooding and severe storms can overwhelm water treatment plants, cause sewage overflows, and introduce agricultural runoff, bacteria, and sediment into drinking water supplies.
Where does Granby's water come from?
Granby's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 2,034 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate.
What Granby residents can do
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.
Granby'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 Granby
Industrial polluters nearby
Reported releases to surface water by facilities near Granby, ranked by pounds discharged annually.
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
ALUMINUM FINISHERS LLC GRANBY, MO64844 | — | — | 0.8 mi |
TROUW NUTRITION USA LLC NEOSHO, MO64850 | — | — | 9.3 mi |
US ARMY NATIONAL GUARD CAMP CROWDER RANGES NEOSHO, MO64850 | — | — | 9.5 mi |
NUTRA BLEND CORP NEOSHO, MO64850 | — | — | 8.6 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites within 10 miles of Granby
Superfund sites nearby
Federally tracked hazardous-waste sites on the EPA National Priorities List. Proximity does not necessarily indicate tap-water contamination — the connection depends on hydrology and treatment.
- NEWTON COUNTY MINE TAILINGS8.4 mi
Source: EPA Superfund National Priorities List
Flood & disaster history
Newton County has experienced 7 federally declared disasters since 1974. 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. | 2.7 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Granby compares by contaminant
Explore where Granby ranks among all Missouri cities for specific contaminants.
Water source & infrastructure
Where Granby's water comes from
Granby'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 2,034 people through 1 water system.
Water systems serving Granby
| System Name | PWSID | Population | Source |
|---|---|---|---|
| GRANBY PWS | MO5010321 | 2,034 | GW |
How Granby compares
Full Missouri rankings →Granby's score of 91.1/100 is above the average of 62/100 among major Missouri cities. It outscores 10 of 10 nearby cities.
Nearby cities
View Missouri rankings →About Granby, MO
Wikipedia →Granby is a city in Newton County, Missouri, United States. The population was 2,048 at the 2020 census. It is part of the Joplin, Missouri Metropolitan Statistical Area.
Learn more about your water
Guides and resources related to Granby's water quality findings.
Explore water quality across Newton
Frequently asked questions
Is Granby, MO tap water safe to drink?
Granby's water quality earned a grade of A (91.1/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #64 out of 509 cities tested in Missouri.
What contaminants are in Granby's water?
Lead was measured at 2.7 ppb (90th percentile). 11 violations are on record.
How is Granby'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 Granby?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Granby's water come from?
Granby's water is sourced from Groundwater. The city has 1 water system serving approximately 2,034 residents.
What health violations has Granby's water system had?
Granby has 3 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. 2 violations remain unresolved.
Is Granby's groundwater at risk of contamination?
Granby 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 11 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 Granby's water compare to other cities?
Granby ranks #64 out of 509 cities in Missouri (better than 87% of state cities) and #1872 out of 15744 cities nationally (88th percentile). The grade of A reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Granby's small water system affect quality?
Granby's system serves approximately 2,034 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 11 violations on record.