Is London Mills, IL Tap Water Safe to Drink?
Graded A, with 1 unresolved violation on record. See what was cited — and what it means for your tap. What to do next ↓
91.3/100
waterverge.com London Mills, IL — Water Quality Report
London Mills's drinking water received a grade of A (91.3 out of 100), indicating excellent water quality. The city's 1 water system serves approximately 500 residents using groundwater.
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 1 health-based violation. 1 remains unresolved.
What to know about London Mills's water
London Mills ranks #107 out of 891 cities in Illinois for water quality, placing it above average in the state.
London Mills 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, London Mills may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is London Mills, IL water safe to drink?
London Mills's tap water meets most EPA standards but has areas that warrant attention. With a grade of A (91.3/100), some contaminant levels or compliance issues suggest that residents may benefit from additional filtration. The city's 1 water system serves approximately 500 residents using groundwater (wells).
Recent water quality updates for London Mills
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into London Mills's water quality assessment. Grade: A (91.3/100).
Federal disaster declaration (FEMA DR-4819). Flood event — may have impacted local water infrastructure.
Contaminants: Revised Total Coliform Rule.
Contaminants: Chlorine.
Contaminants: TTHM, Total Haloacetic Acids (HAA5).
Federal disaster declaration (FEMA DR-4461). Flood event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for London Mills's water supply.
Well within EPA limits.
Violation history
London Mills's water system has 18 total violations on record, including 1 health-based violation. 1 remain unresolved. 2 violations were issued in the last 5 years.
Flood & environmental risk
Fulton County has experienced 9 federally declared disasters since 1973. 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 Spoon River.
Where does London Mills's water come from?
London Mills's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 500 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Spoon River (river).
What London Mills 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.
London Mills'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
Fulton County has experienced 9 federally declared disasters since 1973. 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 London Mills compares by contaminant
Explore where London Mills ranks among all Illinois cities for specific contaminants.
Water source & infrastructure
Where London Mills's water comes from
London Mills'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 500 people through 1 water system.
Water bodies near London Mills
London Mills is located near 1 notable water body. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving London Mills
| System Name | PWSID | Population | Source |
|---|---|---|---|
| LONDON MILLS | IL0574620 | 500 | GW |
How London Mills compares
Full Illinois rankings →London Mills's score of 91.3/100 is above the average of 56/100 among major Illinois cities. It outscores 9 of 10 nearby cities.
Nearby cities
View Illinois rankings →About London Mills, IL
Wikipedia →London Mills is a village in Fulton and Knox counties in the U.S. state of Illinois. The population was 350 at the 2020 census.
Learn more about your water
Guides and resources related to London Mills's water quality findings.
Explore water quality across Fulton
Frequently asked questions
Is London Mills, IL tap water safe to drink?
London Mills's water quality earned a grade of A (91.3/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #107 out of 891 cities tested in Illinois.
What contaminants are in London Mills's water?
Lead was measured at 0.0 ppb (90th percentile). 18 violations are on record.
How is London Mills'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 London Mills?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does London Mills's water come from?
London Mills's water is sourced from Groundwater. The city has 1 water system serving approximately 500 residents.
What health violations has London Mills's water system had?
London Mills has 1 health-based violation on record. The most recent violation was recorded in May 2023. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 1 violation remains unresolved.
Is London Mills's groundwater at risk of contamination?
London Mills 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 London Mills's water compare to other cities?
London Mills ranks #107 out of 891 cities in Illinois (better than 88% of state cities) and #1790 out of 15744 cities nationally (89th percentile). The grade of A reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does London Mills's small water system affect quality?
London Mills's system serves approximately 500 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.