2026 Season Alert — WNV positive pools detected in Peoria, Tazewell, DuPage & McHenry counties as of May 2026 (IDPH ↗). Lake County surveillance active.

Biological risk surveillance
across Lake County

Real mosquito surveillance, tick-borne disease data, and environmental health indicators — sourced directly from Illinois IDPH and Lake County Health Department.

Lake County focus vector, tick, and environmental signals Mosquito surveillance zones Water breeding-site signals
Official sourcesModeled estimatesLocal awareness
Interactive by design: a visually guided dashboard that helps residents go from surveillance data to neighborhood-level awareness.
Coverage
16+ cities
Municipality profiles, map lookup, and local risk bands across Lake County.
Focus areas
3 risk layers
WNV, tick exposure, and stagnant-water conditions presented side by side.
What it does
Maps local bio-risk
Turns mosquito, tick, and stagnant-water indicators into easy-to-read Lake County risk zones.
Open map →
Why it matters
Makes data usable
Official surveillance is credible, but scattered. This dashboard organizes it for residents and families.
Check sources →
Scientific layer
Transparent scoring
City labels are modeled estimates with visible weights, limits, and a validation plan.
See model →
Community action
Report concerns
Residents can prepare environmental reports for standing water, mosquitoes, ticks, or sick birds.
Prepare report →
Visual overview

From scattered data to one clear view

The dashboard brings together surveillance, map lookup, and risk communication so the site feels like a real community tool instead of a long report page.

Map searchRisk cardsSource labels
Mosquito focus

Vector surveillance

Highlights why West Nile activity is a central part of the site and gives the page a stronger visual identity.

WNVIDPH
Environmental exposure

Ticks, woods, and water

Balances the page visually by showing the landscape context behind stagnant-water and forest-exposure indicators.

TicksForestsWater

Data Sources & Updates

transparency

Where this dashboard's data comes from

Page last reviewed:
3official public-health source groups
2student-modeled estimate layers
1community reporting pathway
0medical diagnosis claims
View full source table
DatasetSourceUpdate FrequencyUsed For
WNV human cases (statewide) IDPH WNV Surveillance Official Weekly during season Statewide trend chart
Positive mosquito batches (statewide) IDPH WNV Surveillance Official Weekly during season Statewide batches chart
Lake County WNV guidance Lake County Health Dept. LCHD Seasonal Prevention & reporting links
Tick guidance IDPH & CDC public-health guidance Official Seasonal Tick risk awareness content
City-level WNV/tick risk scores Student-created model (see Methodology) Modeled estimate Manual update HIGH/MOD/LOW labels per municipality
City historical pool counts (10-yr) Estimated from IDPH county-level surveillance Modeled estimate Manual update City profile bar charts
2026 early-season alerts IDPH news releases & local news News-based As released 2026 panel & alert banner
Community sightings User-submitted via form Community Real-time / manual review Local concern reporting
Source labels: Official = IDPH or CDC verified data · LCHD = Lake County Health Dept. · Modeled estimate = student-created model output · News-based = news/press release · Community = user-submitted

Surveillance Data

2025 full season + 2026 live
Illinois — 2025 Full Season Official IDPH
Source: IDPH WNV Surveillance — verified final data (Dec 24, 2025)
2025 COMPLETE
3,992
Positive mosquito batches
150
Human cases
10
Human deaths
73
Counties affected
26
Positive animals
65
Median age (cases)
2025 was a significant year — 150 human cases was the highest since 2018 (IDPH ↗). First positive pool detected May 9 in Rockford. Lake County had confirmed WNV-positive pools and community transmission throughout summer.
Illinois — 2026 Current Season
Source: Illinois Dept. of Public Health WNV Surveillance — checked against IDPH live page
2026 SEASON
Early
Positive pools IL
0
Human cases IL
4+
Counties with positives
Monitoring
Lake County status
May 21
First positive detected
Rising
Season trajectory
As of May 2026: WNV confirmed in Peoria Co. (May 21), Tazewell Co. (May 26), DuPage Co. (May 12, Roselle/Glendale Heights/Wheaton), and McHenry Co. Mosquitoes testing positive earlier than usual this year per IDPH. No Lake County human cases yet — but neighboring county activity is a strong early-season warning signal. View IDPH live data ↗

Lake County Risk Indicators

current season
🦟 West Nile Virus
HIGH
Neighboring counties positive in May 2026. Lake County surveillance active. 2025 was highest year since 2018.
IDPH + Lake County Health Dept.
🦠 Tick-Borne Disease
MOD
500+ adult deer ticks collected in Cook/Lake forest preserves since February 2026 per NWMAD. Active now.
NWMAD Tick Surveillance 2026
💧 Stagnant Water Index
MOD
Spring rainfall creating breeding sites. Mosquito season starting earlier than usual in 2026.
MCHD + Community reports
🌳 Forest Exposure Risk
LOW
Standard precautions sufficient but ticks are active now (above 45°F). Check after every forest visit.
Lake County Forest Preserves

Search Your Location

OpenStreetMap — free & no API key
Try: "Waukegan IL" or "Buffalo Grove 60089"
🦟 Mosquito / WNV Risk
🦠 Tick-Borne Risk
💧 Stagnant Water Reports
For urgent concerns: Lake County Health Dept. (847) 377-8000 | WNV Hotline: (847) 377-8300
City Risk Profile
Historical mosquito surveillance data + current season indicators

WNV Risk Index by season — this city/zone

City risk profile facts

Recommended Precautions

Risk by Municipality

all of Lake County

2026 season rankings

WaukeganHIGH
North ChicagoHIGH
ZionHIGH
GurneeMOD
Round Lake / Round Lake BeachMOD
Highland ParkMOD
Lake ForestMOD
Winthrop HarborMOD
Buffalo GroveLOW
LincolnshireLOW
LibertyvilleLOW
AntiochMOD
Vernon HillsLOW
MundeleinLOW
Lake VillaMOD

Public health data sources

🌲 Lake County Forest Preserves
🗺 OpenStreetMap (mapping library)
AI-assisted summarization was used during development; all public-health data should be verified against official sources.

2026 season so far

May 12DuPage positive ⚠
May 21Peoria positive ⚠
May 26Tazewell positive ⚠
Lake CountyMonitoring 🔍
Season starting earlier than 2025

Risk Score Methodology

how risk levels are calculated

How city-level risk levels are calculated Student-created model

The HIGH/MOD/LOW labels shown for each municipality are produced by a weighted scoring model I built using publicly available surveillance indicators. This is not an official Lake County or IDPH risk assessment — it's my best estimate using transparent inputs. Each city receives a score from 0–100, which maps to a risk band.

1. Collect indicatorsUse official surveillance, nearby positives, terrain, and exposure factors.
2. Weight the factorsAssign transparent percentages for mosquito/WNV and tick-borne risk.
3. Convert to bandsMap 0–100 scores into LOW, MODERATE, or HIGH public-facing labels.

🦟 Mosquito / WNV Risk Score

Current-year positive mosquito pools nearby35%
Previous-year WNV positives in municipality/county25%
Proximity to positive neighboring counties15%
Stagnant water & rainfall conditions15%
Population density & outdoor exposure10%

🦠 Tick-Borne Risk Score

Forest preserve / wooded area proximity35%
Historical Lyme cases in municipality (5-yr avg)25%
Active tick survey detections nearby20%
Deer population & wildlife corridors10%
Trail / park use intensity10%

Score-to-band mapping

LOW0–33
MODERATE34–66
HIGH67–100
⚠ Important limitations: This is a transparent estimation model, not an official risk assessment. Some inputs (especially stagnant water and population density) rely on general patterns rather than real-time measurements. Always defer to official Lake County Health Department and IDPH guidance for medical and emergency decisions.
View model validation plan

Model validation plan

A scoring model is only as good as its accuracy against real-world outcomes. After the 2026 mosquito season closes (December 2026), this model will be validated against actual IDPH and LCHD surveillance data using the following process:

📊 Predictive accuracy

Compare 2026 predicted HIGH/MOD/LOW classifications with actual post-season WNV positive counts per municipality.

📈 Differentiation check

Verify that HIGH-risk zones recorded more positive mosquito batches than LOW-risk zones — the basic test of model usefulness.

🔧 Weight adjustment

Refine factor weights for 2027 based on which inputs best predicted observed outcomes.

⚖️ Error tracking

Document false positives (HIGH predicted, LOW observed) and false negatives (LOW predicted, HIGH observed) to understand model blind spots.

Historical Trends — Illinois Statewide

IDPH verified data

Human WNV cases per year — Illinois (IDPH)

Positive mosquito batches per year — Illinois (IDPH)

Public Awareness

🦟

Mosquito prevention

Eliminate standing water every week. Use EPA-registered repellents (DEET, picaridin, IR3535, or oil of lemon eucalyptus). Wear long sleeves at dusk and dawn, June–October. Repair window screens. (CDC prevention guide ↗)

🦠

Tick awareness

Ticks are active any time temperatures exceed 45°F (CDC ↗). Check yourself after outdoor activity. Use permethrin on clothing, DEET on skin. Remove ticks within 24–36 hrs to reduce Lyme transmission.

💧

Report stagnant water

Standing water sitting more than one week? Report it via the form below — your email goes directly to Lake County Environmental Health. Call the WNV Hotline: (847) 377-8300.

Community Reporting

emails Lake County Health Dept. directly

Report a sighting or concern

Fill out below — clicking "Send to Lake County Health Dept." opens your email pre-filled and ready to send to health@lakecountyil.gov

Privacy note: This form does not provide medical advice and does not store data on any server. Do not submit private medical information. Reports are intended for environmental concerns such as standing water, mosquito swarms, ticks, or sick birds. The form prepares an email to Lake County Environmental Health on your behalf — you choose to send it from your own email client.
✓ Report prepared. Click "Send to Lake County Health Dept." — your email is now pre-filled and ready to send to health@lakecountyil.gov

Community Impact

tracking real-world reach

Project reach & community engagement goals

This dashboard is meant to be useful, not just exist. I'm tracking real impact metrics — feedback from public health professionals, families who view it, and reports submitted. Numbers will grow as the project shares more widely throughout the 2026 season.

📊 Website visits
0
Goal: 500 visits by Sept 2026
📝 Reports prepared
0
Goal: 20 community reports
📋 Survey responses
0
Goal: 100 student/family responses
🏥 Public-health feedback
0
Goal: 3 expert reviews
👨‍👩‍👧 Families reached
0
Goal: 50 families in Lake County
🔄 Iterations from feedback
0
Goal: 5+ feedback-driven updates
📬 Want to help? If you're a Lake County resident, teacher, or public-health professional, I'd love your feedback. Email ambujasingh101@gmail.com with any suggestions or corrections.

About the Creator

why this exists
Ambuja Singh

Hi, I'm Ambuja Singh

📚 Senior at Stevenson High School · Lake County, IL · ✉ ambujasingh101@gmail.com

I built Lake County BioRisk Mapper because public health information about mosquito-borne and tick-borne diseases in our community is scattered across government PDFs, technical surveillance pages, and news releases that most people never see. By the time families in Lake County hear about a West Nile positive pool near their neighborhood, the season is often well underway.

This site pulls that information together in one spot — type in your address and see what's going on in your area, what the risk level is, and who to contact if something looks off.

Why I made this: I've always been interested in how data and biology can intersect to solve everyday problems. If this helps even a few people in my community stay aware and take precautions, that's enough for me.
🌐 Built with HTML, JS, Leaflet 📊 Data from IDPH & LCHD 🏥 Public health focus 📍 Lake County, IL
⚠ Disclaimer: Lake County BioRisk Mapper is a student-created educational and public-awareness project. It is not an official government dashboard and does not provide medical diagnosis, treatment, or emergency guidance. City-level risk scores (HIGH/MOD/LOW) are produced by a transparent student-built model (see Methodology) and are not official Lake County or IDPH risk assessments. For official information, contact the Illinois Department of Public Health, the Lake County Health Department, or a medical professional. In an emergency, call 911.