Is Oakland, IL Tap Water Safe to Drink?
Graded B+, with 5 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
84.1/100
waterverge.com Oakland, IL — Water Quality Report
Oakland's drinking water received a grade of B+ (84.1 out of 100), indicating good water quality. The city's 1 water system serves approximately 739 residents using purchased ground water.
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 18 violations on record, including 0 health-based violations. 5 remain unresolved.
What to know about Oakland's water
Oakland ranks #423 out of 891 cities in Illinois for water quality, placing it mid-range in the state.
Oakland purchases its water from a regional wholesaler, meaning quality depends on both the supplier's treatment and the local distribution system's condition.
As a small community water system, Oakland may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
The system has seen 6 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Oakland, IL water safe to drink?
Oakland's drinking water has significant quality concerns based on EPA testing data. With a grade of B+ (84.1/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 739 residents using groundwater (wells).
Recent water quality updates for Oakland
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Oakland's water quality assessment. Grade: B+ (84.1/100).
Contaminants: Lead and Copper Rule.
Contaminants: Public Notice.
Federal disaster declaration (FEMA DR-4819). Flood event — may have impacted local water infrastructure.
Contaminants: TTHM, Total Haloacetic Acids (HAA5).
Federal disaster declaration (FEMA DR-4749). Flood event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Oakland's water supply.
Well within EPA limits.
Violation history
Oakland's water system has 18 total violations on record, including 0 health-based violations. 5 remain unresolved. 6 violations were issued in the last 5 years.
Flood & environmental risk
Cook County has experienced 9 federally declared disasters since 1972. 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 Lake Michigan, Pullman Creek, Nb Chicago River, Chicago River, Chicago S & S Canal.
Where does Oakland's water come from?
Oakland's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 739 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Lake Michigan (lake), Pullman Creek (river), Nb Chicago River (river), Chicago River (river), Chicago S & S Canal (river).
What Oakland residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Oakland'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.
Oakland'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
Flood & disaster history
Cook County has experienced 9 federally declared disasters since 1972. 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 Oakland compares by contaminant
Explore where Oakland ranks among all Illinois cities for specific contaminants.
Water source & infrastructure
Where Oakland's water comes from
Oakland purchases its water supply from a regional wholesale provider rather than treating raw water directly.
Water quality depends on both the wholesaler's treatment standards and the condition of Oakland's local distribution pipes and storage facilities.
Purchased water systems are common in suburban areas and smaller communities that lack the infrastructure for independent treatment.
The system is operated by local government ownership and serves approximately 739 people through 1 water system.
Water bodies near Oakland
Oakland is located near 5 notable water bodies. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Oakland
| System Name | PWSID | Population | Source |
|---|---|---|---|
| OAKLAND | IL0290300 | 739 | GWP |
How Oakland compares
Full Illinois rankings →Oakland's score of 84.1/100 is above the average of 56/100 among major Illinois cities. It outscores 9 of 10 nearby cities.
Nearby cities
View Illinois rankings →About Oakland, IL
Learn more about your water
Guides and resources related to Oakland's water quality findings.
Explore water quality across Coles
Frequently asked questions
Is Oakland, IL tap water safe to drink?
Oakland's water quality earned a grade of B+ (84.1/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #423 out of 891 cities tested in Illinois.
What contaminants are in Oakland's water?
Lead was measured at 0.0 ppb (90th percentile). 18 violations are on record.
How is Oakland'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 Oakland?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Oakland's water come from?
Oakland's water is sourced from Purchased ground water. The city has 1 water system serving approximately 739 residents.
Is Oakland's groundwater at risk of contamination?
Oakland 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 18 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 Oakland's water compare to other cities?
Oakland ranks #423 out of 891 cities in Illinois (better than 53% of state cities) and #6103 out of 15744 cities nationally (61th percentile). The grade of B+ reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Oakland's small water system affect quality?
Oakland's system serves approximately 739 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 18 violations on record.