Is Subiaco, AR Tap Water Safe to Drink?
Graded C+, with 7 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
66.4/100
waterverge.com Subiaco, AR — Water Quality Report
Subiaco's drinking water received a grade of C+ (66.4 out of 100), indicating fair water quality. The city's 2 water systems serve approximately 783 residents using purchased surface water.
Lead levels were measured at 3.0 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 90 violations on record, including 64 health-based violations. 7 remain unresolved.
What to know about Subiaco's water
Subiaco ranks #281 out of 345 cities in Arkansas for water quality, placing it among the lowest-rated 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, Subiaco may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Subiaco, AR water safe to drink?
Subiaco's drinking water has significant quality concerns based on EPA testing data. With a grade of C+ (66.4/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 2 water systems serve approximately 783 residents using surface water (rivers, lakes, or reservoirs).
Recent water quality updates for Subiaco
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Subiaco's water quality assessment. Grade: C+ (66.4/100).
3 health-based. Contaminants: TTHM.
Federal disaster declaration (FEMA DR-3541). Hurricane event — may have impacted local water infrastructure.
3 health-based. Contaminants: TTHM, Total Haloacetic Acids (HAA5).
2 health-based. Contaminants: TTHM, Total Haloacetic Acids (HAA5).
Federal disaster declaration (FEMA DR-4441). Flood event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Subiaco's water supply.
Well within EPA limits.
Violation history
Subiaco's water system has 90 total violations on record, including 64 health-based violations. 7 remain unresolved. 3 violations were issued in the last 5 years.
Flood & environmental risk
Logan County has experienced 7 federally declared disasters since 1969. 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 Subiaco's water come from?
Subiaco's drinking water comes from surface water (rivers, lakes, or reservoirs), supplied by 2 water systems serving approximately 783 people. Surface water sources are more susceptible to contamination from runoff, industrial discharge, and algal blooms, requiring extensive treatment.
What Subiaco residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Subiaco'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.
Subiaco'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 Subiaco
Industrial polluters nearby
Reported releases to surface water by facilities near Subiaco, ranked by pounds discharged annually.
Total reported releases to surface water: 450,082 lbs
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
TYSON POULTRY INC. SCRANTON, AR72863 | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 450,082 | 6.7 mi |
BUTTERBALL LLC ALIX, AR72820 | — | — | 8.3 mi |
AAM METAL FORMING - SUBIACO SUBIACO, AR72865 | — | — | 0.3 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Drought conditions
D3 — extreme droughtLogan 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
Logan County has experienced 7 federally declared disasters since 1969. 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. | 3.0 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Subiaco compares by contaminant
Explore where Subiaco ranks among all Arkansas cities for specific contaminants.
Water source & infrastructure
Where Subiaco's water comes from
Subiaco's drinking water comes primarily from surface water sources such as rivers, lakes, or reservoirs.
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 783 people through 2 water systems.
Water systems serving Subiaco
| System Name | PWSID | Population | Source |
|---|---|---|---|
| SUBIACO CITY WATERWORKS | AR0000135 | 533 | SWP |
| SUBIACO ACADEMY WATERWORKS | AR0000334 | 250 | SW |
How Subiaco compares
Full Arkansas rankings →Subiaco's score of 66.4/100 is below the average of 75/100 among major Arkansas cities. It outscores 2 of 10 nearby cities. 8 of 10 nearby cities score higher.
Nearby cities
View Arkansas rankings →About Subiaco, AR
Learn more about your water
Guides and resources related to Subiaco's water quality findings.
Explore water quality across Logan
Frequently asked questions
Is Subiaco, AR tap water safe to drink?
Subiaco's water quality earned a grade of C+ (66.4/100). Some concerns have been identified. Consider a water filter for an extra layer of protection. The city ranks #281 out of 345 cities tested in Arkansas.
What contaminants are in Subiaco's water?
Lead was measured at 3.0 ppb (90th percentile). 90 violations are on record.
How is Subiaco'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 Subiaco?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Subiaco's water come from?
Subiaco's water is sourced from Purchased surface water. The city has 2 water systems serving approximately 783 residents.
What health violations has Subiaco's water system had?
Subiaco has 64 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. 7 violations remain unresolved.
How does Subiaco's water compare to other cities?
Subiaco ranks #281 out of 345 cities in Arkansas (better than 19% of state cities) and #11381 out of 15744 cities nationally (28th percentile). The grade of C+ reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.