DENVER, Illinois Tap Water Quality

3,723 people served · 10 water systems

Failing

DENVER, Illinois is a small town with 3,723 residents served by a network of 10 public water systems. Water service covers ZIP codes 80222, 80237.

DENVER has accumulated a significant number of EPA health-based violations. Reviewing the contaminants involved, requesting your utility's Consumer Confidence Report, and using certified point-of-use filtration is strongly advisable.

EPA reporting identifies Radium among the regulated contaminants associated with DENVER's recent health-based violations. Each contaminant has different sources, health implications, and recommended mitigation steps — links to the full EPA reference for each are listed alongside the violation history below.

Last updated: 2026-05-18 · Source: EPA SDWIS

Location

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Approximate location based on state.

ZIP Codes Served

80222 80237

Health-Based Violations (Last 5 Years)

EPA Maximum Contaminant Level exceedances reported by water systems serving DENVER. Each entry explains the contaminant, the health risk, and recommended precautions, and links to a full guide.

Radiumradiological

EPA Code 4010 · Maximum Contaminant Level Exceedance

102

violations

EPA Limit

5 pCi/L

Last Reading

13 PCI/L

First Reported

Jan 2021

Most Recent

Oct 2024

What this violation means

Radium-226 and Radium-228 occur naturally in groundwater, particularly in regions with granite or sandstone aquifers. Long-term ingestion increases the risk of bone, sinus, and other cancers because radium concentrates in bone tissue.

Recommended precautions

→Reverse osmosis and ion exchange (water softeners) remove radium.
→Boiling does NOT remove radium and may concentrate it.
→Private well users in radium-rich geology should test every 3–5 years.

Read the complete guide to Radium

Source: EPA Safe Drinking Water Information System (SDWIS). Health-based violations only. Older violations may have been resolved; check your utility's most recent Consumer Confidence Report for current status.

Water Systems Serving DENVER

BEACH MHP

PWSID: IL0970010

624 served

IMPERIAL MHC

PWSID: IL1975225

328 served

COUNTRY ACRES MHP (LA SALLE COUNTY)

PWSID: IL0995365

222 served

102 violations

BURT ESTATES MHC

PWSID: IL0630070

543 served

BUCKHORN RANCH ESTATES MHP

PWSID: IL0310070

702 served

OAK LANE MHC

PWSID: IL0311900

388 served

MAPLE CREST MANOR MHP

PWSID: IL0915040

190 served

THE MEADOWS

PWSID: IL1030060

238 served

HIGH CLIFF ESTATES

PWSID: IL1610410

448 served

HARVEST ESTATES (FORMERLY BILLS MHP)

PWSID: IL0915165

40 served

What Can You Do?

✅ Request your utility's annual Consumer Confidence Report (CCR) — required by law.
✅ Use an NSF-certified water filter if violations involve lead, arsenic, or PFAS.
✅ Run cold water for 30 seconds before drinking if you have older plumbing (reduces lead).
✅ Check back monthly — we update data from the EPA every 30 days.

About this data

This overview reflects EPA SDWIS data published as of 2026-05-18. It covers active Community Water Systems (CWS) that exceeded federal Maximum Contaminant Levels during the past five-year EPA reporting window. For up-to-the-minute information, request a current Consumer Confidence Report from your utility, or review the EPA's public dashboard.

Frequently Asked Questions

Is DENVER, Illinois tap water safe to drink?▼

This city's water had numerous EPA violations in the last 5 years. Consider filtered water.

How many EPA violations does DENVER have?▼

DENVER has 102 EPA health-based water violations in the last 5 years across 10 water systems serving 3,723 people.

What contaminants have been found in DENVER water?▼

The following EPA-regulated contaminants have been detected: 4010. View details about each contaminant, health effects, and recommended precautions above in the violations table.

Should I use a water filter in DENVER?▼

Using an NSF-certified water filter is recommended if your area has violations involving lead, arsenic, or PFAS. For other contaminants, consult your local water utility. Check the annual Consumer Confidence Report (CCR) for detailed guidance.

What should I do if there are violations in DENVER?▼

Request your water utility's annual Consumer Confidence Report (CCR), which is required by the EPA. Follow the utility's guidance on boil water advisories. Run cold water for 30 seconds before drinking if you have older plumbing. Use an NSF-certified filter if needed based on your water system's violations.