Cu
1.1× the limitCopper
1.4mg/L
Each block = 1.3 mg/L federal action level
EPA SDWIS (Lead & Copper Rule) · sampled 2025Evidence
City water report · 2026
Is Lake in the Hills Tap Water Safe? 2026 Water Quality Report
Short answer: Copper (90th percentile) is above its federal limit; lithium sits above a screening level. Lake in the Hills serves 28,661 residents.
Listed match
LAKE IN THE HILLS serves Lake in the Hills
EPA lists this system for the city. Your water bill or annual water quality report names your actual supplier.
- Source
- Groundwater
- Lead service lines
- 0 lead
Source: EPA SDWIS 2026Q2.
- LAKE IN THE HILLSThis reportIL1110400 · 28,661 served
What stands out
One result above the action level
The bar is drawn in blocks of the 1.3 mg/L federal action level, so the length shows how far above it the result sits.
Coverage by group
32 results on record- PFAS (forever chemicals)29 not detected
- Metals & lead1 above · 1 not detected
- Disinfection by-productsNot monitored
- Other1 above
Every detected result
2 detected results, by distance from their limit
LAKE IN THE HILLS (EPA PWSID IL1110400) delivers groundwater to 28,661 residents. This report reflects 29 individual PFAS result(s) from the source UCMR5 observations and the latest Lead & Copper Rule 90th-percentile result. Water hardness and disinfectant type are pending the utility's own annual report.
- LithiumEPA UCMR 5 · 202410 µg/L EPA health reference level (screening, not a legal limit)10.8µg/LAbove screening
- Copper (90th percentile)EPA SDWIS (Lead & Copper Rule) · 20251.3 mg/L federal action level1.4mg/LAbove limit
30 other contaminants tested, none detected
- 11Cl-PF3OUdS
- 4:2 FTS
- 6:2 FTS
- 8:2 FTS
- 9Cl-PF3ONS
- ADONA
- HFPO-DA (GenX)
- NEtFOSAA
- NFDHA
- NMeFOSAA
- PFBA
- PFBS
- PFDA
- PFDoA
- PFEESA
- PFHpA
- PFHpS
- PFHxA
- PFHxS
- PFMBA
- PFMPA
- PFNA
- PFOA
- PFOS
- PFPeA
- PFPeS
- PFTA
- PFTrDA
- PFUnA
- Lead (90th percentile)
Track record
0health-based violations in the last 10 years
From EPA SDWIS. A clean violation history means no enforcement action was recorded; it does not cover contaminants without a limit.
Not in this recordDisinfection by-products weren't monitored in this dataset
No result is not a pass. Your utility's annual water quality report may list them, and a certified lab test covers your own tap.
What you can do
Test first, then treat what was found
- 01 · TestTest your own tap
The records describe the system. A certified lab test shows what reaches your glass.
Certified labHow to test your tap → - 02 · Treat Copper (90th percentile), LithiumDepends on the contaminant
Copper (90th percentile) 1.4 mg/L, above the 1.3 mg/L federal action level; Lithium 10.8 µg/L, above the 10.0 µg/L EPA health reference level
The certifier's listing for each named contaminantTreatment for Copper (90th percentile), Lithium →
Test your own tap
Screening tells you if something is worth a closer look; a lab result is the number you can act on.
As an Amazon Associate, PurityMap earns from qualifying purchases. Affiliate disclosure.
Screening: quick check, not lab-grade
Watersafe Drinking Water Test Kit
Silver Lake Research
Lead, bacteria, nitrate, copper, iron, chlorine, hardness and pH
- Turnaround: Minutes; the bacteria test can take up to 48 hours
What it can't tell you: Each test gives a yes/no or a rough range, not a lab number, and it cannot detect PFAS or arsenic.
Lab-certified results
ETR Labs Basic Water Quality Test Kit
ETR Laboratories
50+ substances, including lead, copper, arsenic, nitrate, hardness and coliform bacteria
- Analyzed by Environmental Testing and Research Laboratories (ETR Labs), Leominster, MA · ISO/IEC 17025:2017, ANAB certificate AT-2638
- Turnaround: 2–4 business days after the lab receives it
What it can't tell you: It does not test PFAS, and not every result on the panel falls under the lab's accredited scope.
When your results arrive, read them here →
Commercial
No certified match for these concerns yet
Each card names which Lake in the Hills findings its current certification covers, and which it doesn't.
As an Amazon Associate, PurityMap earns from qualifying purchases. A product appears here only when a current certification record covers at least one identified concern; every concern stays listed. The retail offer is looked up afterwards and never changes which products appear or their order. Affiliate disclosure.
No product in our catalogue has verified certification for these concerns yet.
Questions
Frequently asked questions
Is Lake in the Hills tap water safe to drink?
PurityMap does not give a safe/unsafe verdict; it shows what the public records measured. For Lake in the Hills, no regulated PFAS were detected in EPA's 2024 testing. LAKE IN THE HILLS (PWSID IL1110400) has a Purity Score of 77/100 (confidence: moderate), assessed at the water-system level and computed only from contaminants that were measured. Water can change in your own pipes, so a certified test is the only way to know what comes out of your tap.
Who provides tap water in Lake in the Hills?
LAKE IN THE HILLS (PWS ID IL1110400) is the public water system on record for Lake in the Hills, Illinois, serving about 28,661 people. Confirm the utility on your water bill before acting on a specific finding.
Where does Lake in the Hills get its drinking water?
Groundwater (primary source of record in EPA SDWIS).
Are PFAS "forever chemicals" in Lake in the Hills's water?
None of the 29 PFAS in EPA's UCMR 5 testing (2024-10-15 to 2025-04-09) was detected. "Not detected" means below the lab's reporting limit, not proven zero.
Is there lead in Lake in the Hills's tap water?
Lead is not in Lake in the Hills's current published record. Lead usually enters from a building's own pipes and fixtures, so a certified home test is the way to know yours.
What does the latest Lake in the Hills water report show?
PurityMap's current record for Lake in the Hills holds 32 findings: 2 above a reference and 30 not detected. Each finding links to its dated public record; a parameter that was never monitored is shown as pending, not as a pass.
Follow this water
Follow Lake in the Hills's water
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Sources and dataAll 32 records and their sourcesEPA UCMR 5 · EPA SDWIS (Lead & Copper Rule)
| Contaminant | Result | Benchmark | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 10.8 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Above the referenced health-based guidance value | 2024-10-15 to 2025-04-09 | UCMR5 Analytical Results: LAKE IN THE HILLS (IL1110400) |
| Copper (90th percentile) | 1.4 mg/L | 1.3 mg/L federal action level | Above the listed reference | 2025–2025 monitoring period | Lead & Copper Rule 90th-percentile: LAKE IN THE HILLS (IL1110400) |
30 other contaminants tested — none detected
| Contaminant | Result | Benchmark | Status | Sampled | Source |
|---|---|---|---|---|---|
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-10-15 to 2025-04-09 | UCMR5 Analytical Results: LAKE IN THE HILLS (IL1110400) |
| 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-10-15 to 2025-04-09 | UCMR5 Analytical Results: LAKE IN THE HILLS (IL1110400) |
| 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-10-15 to 2025-04-09 | UCMR5 Analytical Results: LAKE IN THE HILLS (IL1110400) |
| 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-10-15 to 2025-04-09 | UCMR5 Analytical Results: LAKE IN THE HILLS (IL1110400) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-10-15 to 2025-04-09 | UCMR5 Analytical Results: LAKE IN THE HILLS (IL1110400) |
| 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-10-15 to 2025-04-09 | UCMR5 Analytical Results: LAKE IN THE HILLS (IL1110400) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-10-15 to 2025-04-09 | UCMR5 Analytical Results: LAKE IN THE HILLS (IL1110400) |
| Lead (90th percentile) | Non-Detect (ND) | 15 µg/L federal action level | Not detected above the reporting limit | 2025–2025 monitoring period | Lead & Copper Rule 90th-percentile: LAKE IN THE HILLS (IL1110400) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-10-15 to 2025-04-09 | UCMR5 Analytical Results: LAKE IN THE HILLS (IL1110400) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-10-15 to 2025-04-09 | UCMR5 Analytical Results: LAKE IN THE HILLS (IL1110400) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-10-15 to 2025-04-09 | UCMR5 Analytical Results: LAKE IN THE HILLS (IL1110400) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-10-15 to 2025-04-09 | UCMR5 Analytical Results: LAKE IN THE HILLS (IL1110400) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-10-15 to 2025-04-09 | UCMR5 Analytical Results: LAKE IN THE HILLS (IL1110400) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-10-15 to 2025-04-09 | UCMR5 Analytical Results: LAKE IN THE HILLS (IL1110400) |
| Perfluorobutanesulfonic acid (PFBS) | < 3 ng/L | 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit | Not detected above the reporting limit | 2024-10-15 to 2025-04-09 | UCMR5 Analytical Results: LAKE IN THE HILLS (IL1110400) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-10-15 to 2025-04-09 | UCMR5 Analytical Results: LAKE IN THE HILLS (IL1110400) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-10-15 to 2025-04-09 | UCMR5 Analytical Results: LAKE IN THE HILLS (IL1110400) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-10-15 to 2025-04-09 | UCMR5 Analytical Results: LAKE IN THE HILLS (IL1110400) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-10-15 to 2025-04-09 | UCMR5 Analytical Results: LAKE IN THE HILLS (IL1110400) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-10-15 to 2025-04-09 | UCMR5 Analytical Results: LAKE IN THE HILLS (IL1110400) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-10-15 to 2025-04-09 | UCMR5 Analytical Results: LAKE IN THE HILLS (IL1110400) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2024-10-15 to 2025-04-09 | UCMR5 Analytical Results: LAKE IN THE HILLS (IL1110400) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-10-15 to 2025-04-09 | UCMR5 Analytical Results: LAKE IN THE HILLS (IL1110400) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-10-15 to 2025-04-09 | UCMR5 Analytical Results: LAKE IN THE HILLS (IL1110400) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-10-15 to 2025-04-09 | UCMR5 Analytical Results: LAKE IN THE HILLS (IL1110400) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-10-15 to 2025-04-09 | UCMR5 Analytical Results: LAKE IN THE HILLS (IL1110400) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-10-15 to 2025-04-09 | UCMR5 Analytical Results: LAKE IN THE HILLS (IL1110400) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-10-15 to 2025-04-09 | UCMR5 Analytical Results: LAKE IN THE HILLS (IL1110400) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-10-15 to 2025-04-09 | UCMR5 Analytical Results: LAKE IN THE HILLS (IL1110400) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-10-15 to 2025-04-09 | UCMR5 Analytical Results: LAKE IN THE HILLS (IL1110400) |
- Result
- 10.8 µg/L
- Benchmark
- 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit
- Status
- Above the referenced health-based guidance value
- Sampled
- 2024-10-15 to 2025-04-09
- Result
- 1.4 mg/L
- Benchmark
- 1.3 mg/L federal action level
- Status
- Above the listed reference
- Sampled
- 2025–2025 monitoring period
30 other contaminants tested — none detected
11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
- Result
- < 5 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2024-10-15 to 2025-04-09
1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)
- Result
- < 5 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2024-10-15 to 2025-04-09
1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)
- Result
- < 3 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2024-10-15 to 2025-04-09
1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)
- Result
- < 5 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2024-10-15 to 2025-04-09
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
- Result
- < 3 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2024-10-15 to 2025-04-09
9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)
- Result
- < 2 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2024-10-15 to 2025-04-09
Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
- Result
- < 5 ng/L
- Benchmark
- 10 ng/L federal MCL (2024)
- Status
- Not detected above the reporting limit
- Sampled
- 2024-10-15 to 2025-04-09
- Result
- Non-Detect (ND)
- Benchmark
- 15 µg/L federal action level
- Status
- Not detected above the reporting limit
- Sampled
- 2025–2025 monitoring period
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
- Result
- < 5 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2024-10-15 to 2025-04-09
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
- Result
- < 6 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2024-10-15 to 2025-04-09
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
- Result
- < 20 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2024-10-15 to 2025-04-09
Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
- Result
- < 3 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2024-10-15 to 2025-04-09
Perfluoro-3-methoxypropanoic acid (PFMPA)
- Result
- < 4 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2024-10-15 to 2025-04-09
Perfluoro-4-methoxybutanoic acid (PFMBA)
- Result
- < 3 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2024-10-15 to 2025-04-09
Perfluorobutanesulfonic acid (PFBS)
- Result
- < 3 ng/L
- Benchmark
- 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit
- Status
- Not detected above the reporting limit
- Sampled
- 2024-10-15 to 2025-04-09
- Result
- < 5 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2024-10-15 to 2025-04-09
- Result
- < 3 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2024-10-15 to 2025-04-09
Perfluorododecanoic acid (PFDoA)
- Result
- < 3 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2024-10-15 to 2025-04-09
Perfluoroheptanesulfonic acid (PFHpS)
- Result
- < 3 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2024-10-15 to 2025-04-09
Perfluoroheptanoic acid (PFHpA)
- Result
- < 3 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2024-10-15 to 2025-04-09
Perfluorohexanesulfonic acid (PFHxS)
- Result
- < 3 ng/L
- Benchmark
- 10 ng/L federal MCL (2024)
- Status
- Not detected above the reporting limit
- Sampled
- 2024-10-15 to 2025-04-09
Perfluorohexanoic acid (PFHxA)
- Result
- < 3 ng/L
- Benchmark
- 400,000 ng/L Michigan EGLE state MCL (strictest US state)
- Status
- Not detected above the reporting limit
- Sampled
- 2024-10-15 to 2025-04-09
- Result
- < 4 ng/L
- Benchmark
- 10 ng/L federal MCL (2024)
- Status
- Not detected above the reporting limit
- Sampled
- 2024-10-15 to 2025-04-09
Perfluorooctanesulfonic acid (PFOS)
- Result
- < 4 ng/L
- Benchmark
- 4.0 ng/L federal MCL (2024)
- Status
- Not detected above the reporting limit
- Sampled
- 2024-10-15 to 2025-04-09
- Result
- < 4 ng/L
- Benchmark
- 4.0 ng/L federal MCL (2024)
- Status
- Not detected above the reporting limit
- Sampled
- 2024-10-15 to 2025-04-09
Perfluoropentanesulfonic acid (PFPeS)
- Result
- < 4 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2024-10-15 to 2025-04-09
Perfluoropentanoic acid (PFPeA)
- Result
- < 3 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2024-10-15 to 2025-04-09
Perfluorotetradecanoic acid (PFTA)
- Result
- < 8 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2024-10-15 to 2025-04-09
Perfluorotridecanoic acid (PFTrDA)
- Result
- < 7 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2024-10-15 to 2025-04-09
Perfluoroundecanoic acid (PFUnA)
- Result
- < 2 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2024-10-15 to 2025-04-09
Every value is the published result from the cited public record. A reporting limit is the lowest level the method could reliably quantify; a non-detect is not a guarantee of zero.
UCMR5 Analytical Results
UCMR5 Analytical Results: LAKE IN THE HILLS (IL1110400)
US EPA
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: LAKE IN THE HILLS (IL1110400)
US EPA SDWIS
Methodology: how we analyze water. Prepared with AI assistance and reviewed by the PurityMap Editorial Team before publication.
Something off with your water's smell, color or taste?
Start with the hot-or-cold tap check. Where Lake in the Hills reported something related, it's shown below.
- Rotten-egg smell
- Cloudy or milky water
- Chlorine smell
- Brown or yellow water
- Metallic taste
Lead at Lake in the Hills: not detected (90th percentile, 2025 monitoring period). Lead has no taste, so a taste neither shows nor rules it out.
Copper: 1.4 mg/L (90th percentile, 2025 monitoring period). The federal action level is 1.3 mg/L.
ZIP codes in Lake in the Hills
A ZIP code is a postal area, not a water service area. Your water bill names your supplier.