Crest Hill Water Quality (Illinois) – 2024 Report Results

We read 15 results from Crest Hill’s 2024 water quality report. No results over a legal limit; 4 above a health goal or guideline.

Serves about 21,169 people · Water system ID IL1970250 · Read the district’s 2024 report (opens in a new tab)

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Results from the 2024 report

Each number is copied from the district’s report and links to the page it’s printed on. Where the report lists several plants, wells or purchased water, the highest is shown.

Contaminant	Result	Health goal	Legal limit	What it means
Arsenichighest measured · range ND to 0.75 · Wells / treated water · 2024 report, page 7	0.75 ppb	0.004 ppb	10 ppb	Above the health goal188x the health goal
Gross alpha (radioactivity)highest measured · range 5.11 to 5.37 · Wells / treated water · 2024 report, page 8	5.37 pCi/L	0 pCi/L	15 pCi/L	Above the health goalThe health goal is zero
Manganesehighest measured · range 0.06 to 0.06 · printed as 64 ppb · Wells / treated water · 2024 report, page 7	0.06 ppm	—	0.05 ppm guideline	Above the guideline1.3x the guideline (taste, odor or stains; not a health limit)
Radium (combined 226 + 228)highest measured · range 2.28 to 2.71 · Wells / treated water · 2024 report, page 8	2.71 pCi/L	0 pCi/L	5 pCi/L	Above the health goalThe health goal is zero
Bariumhighest measured · range 0.08 to 0.15 · Wells / treated water · 2024 report, page 7	0.15 ppm	2 ppm	2 ppm	Below the health goal
Chlorinehighest measured · range 0.8 to 1 · Distribution system · 2024 report, page 7	0.9 ppm	None set	4 ppm	Below the legal limit
Chromium (total)highest measured · range 3.08 to 4.91 · Wells / treated water · 2024 report, page 7	4.91 ppb	None set	100 ppb	Below the legal limit
Disinfection byproducts (HAA5)highest measured · range ND to 5.4 · Distribution system · 2024 report, page 7	4 ppb	None set	60 ppb	Below the legal limit
Disinfection byproducts (TTHM)highest measured · range ND to 31 · Distribution system · 2024 report, page 7	9 ppb	None set	80 ppb	Below the legal limit
Fluoridehighest measured · range 0.71 to 0.86 · Wells / treated water · 2024 report, page 7	0.86 ppm	1 ppm	4 ppm	Below the health goal
Nitrate (as N)highest measured · range ND to 7.1 · Wells / treated water · 2024 report, page 8	7 ppm	10 ppm	10 ppm	Below the health goal
Seleniumhighest measured · range ND to 1.73 · Wells / treated water · 2024 report, page 8	1.73 ppb	30 ppb	50 ppb	Below the health goal
Simazinehighest measured · range ND to 0.02 · sampled 2023 · Wells / treated water · 2024 report, page 9	0.02 ppb	4 ppb	4 ppb	Below the health goal
Zinchighest measured · range 0.0057 to 0.04 · Wells / treated water · 2024 report, page 8	0.04 ppm	—	5 ppm guideline	Within the guideline
Sodiumhighest measured · range 124 to 124 · printed as 124000 ppb · Wells / treated water · 2024 report, page 8	124 ppm	None set	None	No health limit

Utility results describe the whole system, measured where water enters the pipes, not your tap. Your home’s plumbing can add lead or copper. 3 numbers we weren’t sure about are held back until a person checks.

EPA testing for PFAS and lithium

EPA’s own nationwide testing (UCMR 5) found these in Crest Hill’s water between Jun 2023 and Dec 2023. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.

PFOA13.7 pptFound in 6 of 14 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
PFHxS12.2 pptFound in 9 of 14 samples · highest resultNo federal limit in force for this one
PFBS52.1 pptFound in 14 of 14 samples · highest resultNo federal limit in force for this one
Lithium34.8 ppbFound in 14 of 14 samples · highest resultAbove EPA’s health reference level of 10 ppb (a guide, not a legal limit)

Source: EPA UCMR 5 occurrence data. The highest single result is shown; one high sample doesn’t mean every glass is that high.

What you can do

Nothing here is an emergency notice: if the district has a violation, it must tell customers directly. If you’d like to lower these at your tap, these are the treatments that remove them, and the catalog shows the models certified for each. Ranking is by certified removal; commissions never change the order.