01The verdict: is Grand Junction water safe?
Grand Junction's tap water meets most EPA standards but has areas that warrant attention. With a grade of A (93.1/100), some contaminant levels or compliance issues suggest that residents may benefit from additional filtration. The city's 1 water system serves approximately 1,019 residents using groundwater (wells).
1 unresolved violation on record
EPA records show an open compliance item for this system. Most are administrative, but unresolved items are worth watching.
See what was cited ↓Lead is well under the limit
90th-percentile lead is 1.1 ppb — beneath the 15 ppb federal action level and under the 5 ppb watch threshold.
See the trend ↓Check back after the next refresh
EPA data updates on a rolling basis; we fold in new samples and violations every month.
Get alerts ↓Grand Junction's drinking water received a grade of A (93.1 out of 100), indicating excellent water quality. The city's 1 water system serves approximately 1,019 residents using groundwater.
Lead levels were measured at 1.1 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 73 violations on record, including 0 health-based violations. 1 remains unresolved.
Grand Junction ranks #3 out of 319 cities in Mississippi for water quality, placing it one of the best in the state. Grand Junction 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, Grand Junction may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
02What's in Grand Junction's water
Every contaminant flagged in Grand Junction, on one shared scale: distance to its own legal limit. The red line is the limit — anything past it is out of compliance, and the closer a bar gets, the less headroom the system has.
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. | 1.1 | 15 | ppb | Inorganic | Safe |
Cities ranked by 90th-percentile lead PF PFAS in Mississippi
Cities ranked by compounds detected Cu Copper in Mississippi
Cities ranked by 90th-percentile copper
03Grand Junction's ten-year track record
Each box is one year. A green check means no EPA violations; a numbered badge counts that year's violations — red if any were health-based, amber if they were monitoring or paperwork issues. The system has 73 violations on record, including 0 health-based violations. 1 remains unresolved.
All ten of the last ten years were clean — no EPA violations recorded for Grand Junction.
▼ Down 1.9 ppb since 1993. Latest reading: 1.1 ppb (2025) — 7% of the action level. Sampled at higher-risk homes (90th percentile).
04Where Grand Junction's water comes from
Grand Junction's drinking water is drawn from underground aquifers through wells.
Groundwater
Underground aquifers reached by wells — naturally filtered, but can carry minerals like arsenic and nitrate.
Local treatment
Groundwater generally needs less treatment — typically disinfection and, where needed, mineral removal.
1 system
1 water system, operated under local government ownership.
1,019 people
Residents served across Grand Junction's service area.
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 1,019 people through 1 water system.
| System name | PWSID | Population | Source |
|---|---|---|---|
| GRAND JUNCTION WATER DEPT | TN0000267 | 1,019 | Groundwater |
05How Grand Junction compares
Scores for nearby Mississippi cities on one line, with the average marked.
dashed line = Mississippi average (54/100)
Grand Junction scores 93.1/100 — above the Mississippi average of 54/100. It outscores 10 of 10 nearby cities. Full Mississippi rankings →
47.8 / 100DHattiesburg, MS
48.8 / 100DGulfport, MS
52 / 100DCanton, MS
50 / 100FOxford, MS
40.5 / 100BOlive Branch, MS
73 / 100
Compare all cities in the county — grades, violations, and contaminant data side by side.→
06What to do at home
Steps matched to what testing actually found in Grand Junction's water — not generic advice.
A basic carbon filter still helps
Grand Junction's water meets federal standards, but a simple carbon filter improves taste and adds a margin of safety against short-term issues.
Compare tested filters →Read your utility's annual report
Every utility must publish a yearly Consumer Confidence Report with its own testing results. It pairs well with the independent data on this page.
How to read a CCR →Watch for Grand Junction alerts
We refresh EPA data monthly and surface new violations, advisories, and boil-water notices for your county on this page.
All water alerts →Frequently asked questions
Is Grand Junction, MS tap water safe to drink?
Grand Junction's water quality earned a grade of A (93.1/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #3 out of 319 cities tested in Mississippi.
What contaminants are in Grand Junction's water?
Lead was measured at 1.1 ppb (90th percentile). 73 violations are on record.
How is Grand Junction'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 Grand Junction?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Grand Junction's water come from?
Grand Junction's water is sourced from Groundwater. The city has 1 water system serving approximately 1,019 residents.
Is Grand Junction's groundwater at risk of contamination?
Grand Junction 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 73 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 Grand Junction's water compare to other cities?
Grand Junction ranks #3 out of 319 cities in Mississippi (better than 99% of state cities) and #966 out of 15382 cities nationally (94th percentile). The grade of A reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Grand Junction's small water system affect quality?
Grand Junction's system serves approximately 1,019 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 73 violations on record.