CALEDONIA, Michigan Tap Water Quality

42,633 people served · 5 water systems

Fair

CALEDONIA, Michigan is a small city with 42,633 residents served by 5 public water systems. Water service covers ZIP code 49316.

CALEDONIA has documented several EPA health-based violations in the last five years. Residents may want to review which contaminants triggered the exceedances and consider point-of-use filtration for sensitive uses.

EPA reporting identifies Coliform Bacteria among the regulated contaminants associated with CALEDONIA'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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Centered on ZIP-code centroids of water systems serving this city.

ZIP Codes Served

49316

Health-Based Violations (Last 5 Years)

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

Coliform Bacteriamicrobial

EPA Code 8000 · Treatment Technique Violation

violations

EPA Limit

0 per 100 mL presence/absence

Last Reading

—

First Reported

Nov 2022

Most Recent

Nov 2022

What this violation means

Total coliform bacteria are themselves usually harmless, but their presence signals that the water distribution system has a vulnerability — typically a cracked pipe, loss of pressure, or back-siphonage — that could allow disease-causing pathogens to enter. Repeated coliform-positive samples trigger mandatory utility investigation.

Recommended precautions

→If your utility issues a boil-water advisory, boil all drinking and cooking water for at least one minute.
→Use bottled water until the advisory is lifted.
→Ice from icemakers and beverages made before the advisory should be discarded.
→UV light and chlorination both kill coliform bacteria — most home filters do not.

Read the complete guide to Coliform Bacteria

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 CALEDONIA

LAKESIDE MOBILE HOME COMMUNITY

PWSID: MI0040292

168 served

4 violations

THE PINES

PWSID: MI0040640

65 served

BYRON-GAINES UTILITY AUTHORITY

PWSID: MI0001023

37,464 served

CALEDONIA TOWNSHIP

PWSID: MI0001039

4,573 served

EATON GREEN ESTATES SUBDIVISION

PWSID: MI0002025

363 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 CALEDONIA, Michigan tap water safe to drink?▼

This city's water had several EPA violations in the last 5 years.

How many EPA violations does CALEDONIA have?▼

CALEDONIA has 4 EPA health-based water violations in the last 5 years across 5 water systems serving 42,633 people.

What contaminants have been found in CALEDONIA water?▼

The following EPA-regulated contaminants have been detected: 8000. View details about each contaminant, health effects, and recommended precautions above in the violations table.

Should I use a water filter in CALEDONIA?▼

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 CALEDONIA?▼

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.