Tap Water Results

Is Belvidere, IL tap water safe?

Data: U.S. EPA · How we read the data · How we check it

Summary

No federal limits exceeded in EPA data for Belvidere Water System. 1 PFAS were detected below the limits.

2 public water systems serve parts of Belvidere. The largest, Belvidere Water System, serves 25,339 people. Your water bill names your system.

Largest system

Belvidere Water System

25,339 people · Groundwater · EPA ID IL0070050

PFASHighest averageLimitStatus
PFOA
Not detected
–4 pptNot detected
PFOS
Not detected
–4 pptNot detected
PFHxS
Detected, below limit
5.25 ppt10 pptDetected, below limit
PFNA
Not detected
–10 pptNot detected
HFPO-DA (GenX)
Not detected
–10 pptNot detected

ppt = parts per trillion. "Highest average" is the highest average at any of the system's entry points, the way EPA compares results with the limits.

Lead: 1.8 ppb at the 90th percentile (Nov 2026, and 9 in 10 homes sampled were at or below it) Below action level
Health-based violations since 2016: 0

Across Illinois, 13 of 479 water systems EPA tested had PFAS above a 2024 federal limit, and 18 systems were above the lead action level in results from the last five years. Illinois results.

Belvidere homes and lead pipes

54%
of homes built before 1980 (Illinois 64%, US 50%)
25%
built before 1950 (Illinois 26%)
29%
of households rent (Illinois 33%)

Lead service lines and lead solder were allowed until 1986, so homes from before then are the ones to check. How to check your own line.

Housing: Census American Community Survey 2020–2024 5-year estimates for Belvidere city (tables B25034, B25003). Estimates for small places have a margin of error.

Other water systems serving Belvidere

  • Greenview Estates MHP
    710 people · Purchased groundwater · Illinois · lists this city
    Not in EPA's PFAS sample

How nearby cities compare

CityMain water systemPFASLead (90th pct.)
Rockford 9 mi
Rockford Water System
Rockford Water SystemNone above limits10 ppb
Woodstock 23 mi
Woodstock Water System
Woodstock Water SystemNone above limits7 ppb
DeKalb 24 mi
DeKalb Water System
DeKalb Water SystemNone above limits13 ppb
Huntley 24 mi
Huntley Water System
Huntley Water SystemNone above limits1.1 ppb
Crystal Lake 28 mi
Crystal Lake Water System
Crystal Lake Water SystemNone above limits6.8 ppb
Lake in the Hills 30 mi
Lake in the Hills Water System
Lake in the Hills Water SystemNone above limits2.7 ppb
Belvidere ZIP codes (1)
  • 61008

Questions

Is Belvidere tap water safe to drink?

Belvidere Water System has had no health-based violations since 2016. Utility data can't show lead from your own pipes: if your home was built before 1986, test your tap. Your utility's annual Consumer Confidence Report is the official summary.

Who supplies water in Belvidere, IL?

2 public water systems serve parts of Belvidere. The largest is Belvidere Water System (25,339 people). Your water bill names your system. The EPA ID is also on your utility's Consumer Confidence Report.

Does Belvidere tap water have PFAS?

Belvidere Water System had 1 PFAS detected at least once in EPA's 2023–2025 testing, all with averages below the federal limits.

Do Belvidere homes have lead pipes?

Census estimates put 54% of Belvidere homes as built before 1980 (Illinois: 64%). Lead service lines and lead solder were allowed until 1986, so older homes are more likely to have them. Belvidere Water System's service line inventory says what your line is made of. The only way to know for your home is to check the line where it enters the house and test your tap.

Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.