Tap Water Results

Is Crystal Lake, 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 Crystal Lake Water System. 2 PFAS were detected below the limits.

2 public water systems serve parts of Crystal Lake. The largest, Crystal Lake Water System, serves 40,661 people. Your water bill names your system.

Largest system

Crystal Lake Water System

40,661 people · Groundwater · EPA ID IL1110150

PFASHighest averageLimitStatus
PFOA
Not detected
–4 pptNot detected
PFOS
Not detected
–4 pptNot detected
PFHxS
Not detected
–10 pptNot detected
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: 6.8 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.

Crystal Lake homes and lead pipes

42%
of homes built before 1980 (Illinois 64%, US 50%)
8%
built before 1950 (Illinois 26%)
22%
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 Crystal Lake city (tables B25034, B25003). Estimates for small places have a margin of error.

Other water systems serving Crystal Lake

  • Kohala Ranch Water Company
    850 people · Groundwater · Hawaii · reported ZIPs here
    Lead near 2027 level

How nearby cities compare

CityMain water systemPFASLead (90th pct.)
Lake in the Hills 4 mi
Lake in the Hills Water System
Lake in the Hills Water SystemNone above limits2.7 ppb
Algonquin 5 mi
Algonquin Water System
Algonquin Water SystemNone above limits1.96 ppb
Huntley 7 mi
Huntley Water System
Huntley Water SystemNone above limits1.1 ppb
Woodstock 7 mi
Woodstock Water System
Woodstock Water SystemNone above limits7 ppb
McHenry 8 mi
McHenry Water System
McHenry Water SystemNone above limits6.7 ppb
Carpentersville 8 mi
Carpentersville Water System
Carpentersville Water SystemNone above limits1.1 ppb
Crystal Lake ZIP codes (1)
  • 60014

Questions

Is Crystal Lake tap water safe to drink?

Crystal Lake 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 Crystal Lake, IL?

2 public water systems serve parts of Crystal Lake. The largest is Crystal Lake Water System (40,661 people). Your water bill names your system. The EPA ID is also on your utility's Consumer Confidence Report.

Does Crystal Lake tap water have PFAS?

Crystal Lake Water System had 2 PFAS detected at least once in EPA's 2023–2025 testing, all with averages below the federal limits.

Do Crystal Lake homes have lead pipes?

Census estimates put 42% of Crystal Lake 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. Crystal Lake 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.