Public Water System
PWSID MI0001770 · Michigan · 943 people served
DEERFIELD is an EPA-regulated public water system in Michigan (PWSID MI0001770). It serves an estimated 943 residents — a rural community of customers — across 1 community across 1 ZIP code.
Over the past five years, DEERFIELD has recorded 4 EPA health-based violations. The grade of C summarizes this compliance pattern. Specific contaminants, dates, and rule citations are listed in the violation history below.
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Centered on the averaged ZIP-code centroid of 1 ZIP served.
Population
943
Cities
1
ZIPs
1
Violations
4
Health-based Maximum Contaminant Level (MCL) violations on file for DEERFIELD over the past five years of EPA SDWIS reporting.
EPA Code 2946 · Maximum Contaminant Level Exceedance
violations
EPA Limit
—
Last Reading
.00006 MG/L
First Reported
Apr 2025
Most Recent
Apr 2025
EPA contaminant code 2946. The full EPA reference for this code is available through the SDWIS portal.
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.
EPA records this system as PWSID MI0001770. Data reflects the most recent EPA SDWIS publication as of 2026-05-18. Public Water System Identifiers (PWSIDs) are assigned by the EPA's Safe Drinking Water Act program to track every regulated water utility in the United States. The first two letters typically indicate the state primacy agency. For real-time water quality information, contact DEERFIELD directly or review their annual Consumer Confidence Report (CCR).
Apr 15, 2026 · 7 min read
PFAS contamination affects an estimated 200 million Americans. Here's what the latest EPA enforcement means for your tap water.
Photo by Bluewater Sweden on Unsplash
Mar 22, 2026 · 6 min read
Your water utility is legally required to send you a Consumer Confidence Report every year. Here's how to actually understand it.
Photo by Louis Hansel on Unsplash
Mar 5, 2026 · 9 min read
Lead enters drinking water through old pipes and fixtures. Here's how to identify your risk and what to do about it.
Photo by Eduardo Casajús Gorostiaga on Unsplash
Feb 18, 2026 · 5 min read
MCLs are the foundation of US drinking water safety. Here's how they're set and what they mean for your tap.
Photo by Naja Bertolt Jensen on Unsplash
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