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Tap water quality report

Heatherfield Subdivision

EPA monitoring tested this supplier for 50 contaminants and detected 11. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

50
contaminants tested
11
detected
90
people served
0
health-based violations
Illinois rankingsLead in IllinoisPFAS in Illinois
Water source
Ground water
Ownership
Private
Counties served
Grundy

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.

0
health-based violations
23
violations on file
1
still open
ViolationTypeStatusPeriod
Other Monitoring Unaddressed 2025-07-01
MR Monitoring Archived 2023-01-01 → 2025-12-31
MR Monitoring Archived 2023-01-01 → 2025-12-31
MR Monitoring Resolved 2018-10-01
MR Monitoring Resolved 2018-10-01
MR Monitoring Resolved 2018-10-01
MR Monitoring Resolved 2018-10-01
MR Monitoring Archived 2001-12-01 → 2001-12-31
MR Monitoring Archived 2001-12-01 → 2001-12-31
MR Monitoring Resolved 2001-10-01 → 2001-12-31

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
314 µg/L 24%
of the EPA limit 1300 µg/L
worst single sample: 370 µg/L
15/15 SYR4 2012–2019
Lead
0.0081 mg/L 54%
of the EPA limit 0.0150 mg/L
 12/12 LCR 2022
Lead
8.46 µg/L 56%
of the EPA limit 15 µg/L
worst single sample: 9.3 µg/L
8/15 SYR4 2012–2019
Nitrate
70 µg/L 0.7%
of the EPA limit 10000 µg/L
 4/16 SYR4 2012–2019
Barium
29.84 µg/L 1.5%
of the EPA limit 2000 µg/L
worst single sample: 30 µg/L
3/3 SYR4 2012–2018
Bromodichloromethane
1.23312 µg/L
No EPA limit set
worst single sample: 1.304 µg/L
3/3 SYR4 2013–2017
Chloroform
3.1355 µg/L
No EPA limit set
worst single sample: 3.258 µg/L
3/3 SYR4 2013–2017
Fluoride
916.9 µg/L 23%
of the EPA limit 4000 µg/L
worst single sample: 919 µg/L
3/3 SYR4 2012–2018
TTHM
4.3686 µg/L 5.5%
of the EPA limit 80 µg/L
worst single sample: 4.562 µg/L
3/3 SYR4 2013–2017
Combined Radium (-226 And -228)
2.9645 pCi/L 59%
of the EPA limit 5 pCi/L
worst single sample: 3 pCi/L
2/2 SYR4 2014–2017
Nitrate-Nitrite
70 µg/L 0.7%
of the EPA limit 10000 µg/L
 1/2 SYR4 2018–2019
39 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-DichloropropaneAntimony, TotalArsenicBenzeneBeryllium, TotalBromoformChlorobenzeneCyanideCadmiumCarbon TetrachlorideChromiumDichloromethaneDibromoacetic AcidDibromochloromethaneDichloroacetic AcidEthylbenzeneMercuryMonobromoacetic AcidMonochloroacetic AcidNitriteSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)Trichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
SEAHOLM, DAVID
Phone
815-941-4408

Frequently asked questions about Heatherfield Subdivision

Is Heatherfield Subdivision tap water safe to drink?

EPA monitoring detected 11 contaminants in Heatherfield Subdivision'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 Heatherfield Subdivision's water?

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

How many people does Heatherfield Subdivision serve?

Heatherfield Subdivision reports serving 90 people in Illinois, per its EPA record.

Has Heatherfield Subdivision had any water quality violations?

The EPA has 23 violations on file for Heatherfield Subdivision, of which 0 are health-based (a contaminant limit or required treatment was breached) and 1 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.