Tap water quality report

Prairie Path Water Co-Whispering Hills

EPA monitoring tested this supplier for 108 contaminants and detected 28. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

108
contaminants tested
28
detected
8,300
people served
14
health-based violations
Water source
Ground water
Ownership
Private
Counties served
McHenry

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

14
health-based violations
159
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2024-10-17
TT Health-based Resolved 2024-10-17
TT Health-based Resolved 2024-10-17
TT Health-based Resolved 2024-10-17
MCL Health-based Resolved 2009-11-01 → 2009-11-30
MCL Health-based Resolved 2009-11-01 → 2009-11-30
MCL Health-based Resolved 2009-11-01 → 2009-11-30
MCL Health-based Resolved 2009-11-01 → 2009-11-30
MCL Health-based Archived 2004-06-01 → 2004-06-30
MCL Health-based Archived 2004-06-01 → 2004-06-30

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
Pfhxa 0.0130 µg/L 3/10 2024
Pfpea 0.0140 µg/L 3/10 2024
PFBS 0.0086 µg/L 2/10 2024
Pfba 0.0087 µg/L 1/10 2024
Pfhpa 0.0036 µg/L 1/10 2024
PFHXS 0.0057 µg/L 1/10 2024
PFOA 0.0083 µg/L 1/10 2024

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Copper
943.15 µg/L 73%
of the EPA limit 1300 µg/L
worst single sample: 1170 µg/L
54/60 SYR4 2012–2018
Lead
11.94 µg/L 80%
of the EPA limit 15 µg/L
worst single sample: 29.1 µg/L
25/60 SYR4 2012–2018
Fluoride
1749 µg/L 44%
of the EPA limit 4000 µg/L
worst single sample: 2820 µg/L
18/18 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
15/15 LCR 2025
Barium
174 µg/L 8.7%
of the EPA limit 2000 µg/L
worst single sample: 180 µg/L
13/13 SYR4 2012–2018
Bromodichloromethane
10.008 µg/L
No EPA limit set
worst single sample: 11.1 µg/L
8/8 SYR4 2013–2019
Chloroform
15.55 µg/L
No EPA limit set
worst single sample: 17.3 µg/L
8/8 SYR4 2013–2019
Dibromochloromethane
6.3895 µg/L
No EPA limit set
worst single sample: 7.17 µg/L
8/8 SYR4 2013–2019
TTHM
33.795 µg/L 42%
of the EPA limit 80 µg/L
worst single sample: 38.1 µg/L
8/8 SYR4 2013–2019
Total Haloacetic Acids (HAA5)
13.023 µg/L 22%
of the EPA limit 60 µg/L
worst single sample: 13.52 µg/L
8/8 SYR4 2013–2019
Trichloroacetic Acid
6.9075 µg/L
No EPA limit set
worst single sample: 6.91 µg/L
6/8 SYR4 2013–2019
Bromoform
2.30396 µg/L
No EPA limit set
worst single sample: 2.54 µg/L
4/8 SYR4 2013–2019
Dibromoacetic Acid
3.3805 µg/L
No EPA limit set
worst single sample: 3.73 µg/L
4/8 SYR4 2013–2019
Nitrate
510 µg/L 5.1%
of the EPA limit 10000 µg/L
4/82 SYR4 2012–2019
Arsenic
1.56 µg/L 16%
of the EPA limit 10 µg/L
worst single sample: 1.6 µg/L
3/13 SYR4 2012–2018
Chromium
9.43 µg/L 9.4%
of the EPA limit 100 µg/L
worst single sample: 9.7 µg/L
3/13 SYR4 2012–2018
Dichloroacetic Acid
5.395 µg/L
No EPA limit set
worst single sample: 5.42 µg/L
3/8 SYR4 2013–2019
Nitrate-Nitrite
502 µg/L 5%
of the EPA limit 10000 µg/L
worst single sample: 510 µg/L
2/14 SYR4 2012–2018
Lithium
11 µg/L
No EPA limit set
2/10 UCMR-5 2024
Combined Radium (-226 And -228)
0.5410 pCi/L 11%
of the EPA limit 5 pCi/L
1/6 SYR4 2014–2017
Selenium
3.3 µg/L 6.6%
of the EPA limit 50 µg/L
1/13 SYR4 2012–2018
80 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfdaPfdoaPfeesaPfhpsPfmbaPfmpaPFNAPFOSPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Frequently asked questions about Prairie Path Water Co-Whispering Hills

Is Prairie Path Water Co-Whispering Hills tap water safe to drink?

EPA monitoring detected 28 contaminants in Prairie Path Water Co-Whispering Hills's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Prairie Path Water Co-Whispering Hills's water?

EPA monitoring detected Copper, Lead, Fluoride, Lead, Barium, and others. The full list with the level and data source for each is above.

How many people does Prairie Path Water Co-Whispering Hills serve?

Prairie Path Water Co-Whispering Hills reports serving 8,300 people, per its EPA record.

Has Prairie Path Water Co-Whispering Hills had any water quality violations?

The EPA has 159 violations on file for Prairie Path Water Co-Whispering Hills, of which 14 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.