01The verdict: is Grannis water safe?
Based on EPA testing data, Grannis's tap water is generally safe to drink. The water system earned a grade of A (92.7/100), meeting federal drinking water standards across key contaminant categories. The city's 1 water system serves approximately 548 residents using surface water (rivers, lakes, or reservoirs).
Nothing over a legal limit
Every contaminant measured in Grannis's water is within its EPA limit, and no violations are unresolved.
See the testing ↓Monitoring is on schedule
The system is meeting its EPA monitoring and reporting requirements — testing is happening when it should.
See the score ↓A flood-prone service area
5 federal disaster declarations on record. After severe weather, watch for boil-water advisories.
See the risk factors ↓Grannis's drinking water received a grade of A (92.7 out of 100), indicating excellent water quality. The city's 1 water system serves approximately 548 residents using purchased surface water.
Lead data is not currently available for this system. This system has not yet been tested for PFAS under the EPA UCMR 5 program. The system has 2 violations on record, including 0 health-based violations. All violations have been resolved.
Grannis ranks #54 out of 345 cities in Arkansas for water quality, placing it above average in the state. The city draws from surface water sources, which are more susceptible to seasonal runoff and agricultural contamination, requiring extensive multi-barrier treatment including coagulation, filtration, and disinfection. As a small community water system, Grannis may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
02What's in Grannis's water
Every contaminant flagged in Grannis, 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
No contaminant data available for this city.
Cities ranked by 90th-percentile lead PF PFAS in Arkansas
Cities ranked by compounds detected Cu Copper in Arkansas
Cities ranked by 90th-percentile copper
03Grannis'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 2 violations on record, including 0 health-based violations. All violations have been resolved.
All ten of the last ten years were clean — no EPA violations recorded for Grannis.
04Where Grannis's water comes from
Grannis's drinking water comes primarily from surface water sources such as rivers, lakes, or reservoirs.
Purchased Surface Water
Rivers, lakes, or reservoirs — more exposed to runoff, agriculture, and seasonal swings than groundwater.
Wholesale supplier
Multi-barrier treatment: coagulation, sedimentation, filtration, and disinfection to meet EPA standards.
1 system
1 water system, operated under local government ownership.
548 people
Residents served across Grannis's service area.
Surface water systems require multi-stage treatment including coagulation, sedimentation, filtration, and disinfection to meet EPA Safe Drinking Water Act standards. These sources can be impacted by seasonal changes, stormwater runoff, upstream agriculture, and industrial discharge. The system is operated by local government ownership and serves approximately 548 people through 1 water system.
| System name | PWSID | Population | Source |
|---|---|---|---|
| GRANNIS WATERWORKS | AR0000437 | 548 | Purchased Surface Water |
Water bodies near Grannis
As a surface-water system, these water bodies may directly influence Grannis's drinking water supply.
05Pressure on Grannis's watershed
Outside forces that shape what reaches the treatment plant. None of these is a verdict on the tap by itself — but each adds pressure worth knowing about.
Industrial discharge
1 facility within 10 miles reported 212k lb released to surface water in the latest EPA Toxics Release Inventory. Proximity doesn't equal tap contamination — treatment and hydrology decide — but it's pressure on the watershed.
Flood & storm history
5 federal disaster declarations on record for Polk County. Flooding and severe storms can overwhelm treatment plants, cause sewage overflows, and push runoff into supplies.
Drought
Polk County is in D1 (moderate drought) per the U.S. Drought Monitor (week of Jul 2026). Drought can raise disinfection-byproduct levels and taste/odor issues as utilities draw from lower reservoirs.
06How Grannis compares
Scores for nearby Arkansas cities on one line, with the average marked.
dashed line = Arkansas average (75/100)
Grannis scores 92.7/100 — above the Arkansas average of 75/100. It outscores 9 of 10 nearby cities. Full Arkansas rankings →
69.3 / 100DFayetteville, AR
46.4 / 100BSpringdale, AR
79.1 / 100DFort Smith, AR
45.5 / 100BHot Springs, AR
81.2 / 100BRogers, AR
71.9 / 100
Compare all cities in the county — grades, violations, and contaminant data side by side.→
07What to do at home
Steps matched to what testing actually found in Grannis's water — not generic advice.
A basic carbon filter still helps
Grannis'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 Grannis alerts
This area has a history of flood declarations — after severe weather, watch for boil-water advisories from the utility, and check the live alerts on this page.
All water alerts →Frequently asked questions
Is Grannis, AR tap water safe to drink?
Grannis's water quality earned a grade of A (92.7/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #54 out of 345 cities tested in Arkansas.
What contaminants are in Grannis's water?
2 violations are on record.
How is Grannis'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 Grannis?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Grannis's water come from?
Grannis's water is sourced from Purchased surface water. The city has 1 water system serving approximately 548 residents.
How does Grannis's water compare to other cities?
Grannis ranks #54 out of 345 cities in Arkansas (better than 84% of state cities) and #1157 out of 15382 cities nationally (93th percentile). The grade of A reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Grannis's small water system affect quality?
Grannis's system serves approximately 548 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 2 violations on record.