CAL AM - SUBURBAN ROSEMONTlikely match

City water report · 2026

Is Rosemont Tap Water Safe? 2026 Water Quality Report

Short answer: Three PFAS, PFHxS, PFOA and PFOS, are above their federal limits (2024 limits that water systems have until at least 2029 to meet); 3 more are detected with no federal limit, and everything else measured is within its reference or not detected. Cal Am serves 54,893 residents.

Explore the findings What can I do?Follow

Likely match, check your bill

CAL AM - SUBURBAN ROSEMONT serves Rosemont

Your water bill or annual water quality report names your actual supplier.

Source: Surface water

CAL AM - SUBURBAN ROSEMONTThis report
CA3410010 · 54,893 served

Also supplies: La Riviera

What stands out

Three PFAS above the 2024 federal limit

Each bar is drawn in blocks of its own limit, so the length shows how far above it the result sits.

PFOS

Perfluorooctanesulfonic acid

3.4× the limit

13.4ng/L

Each block = 4.0 ng/L federal MCL (2024)

EPA UCMR 5 · sampled 2023Evidence

PFOA

Perfluorooctanoic acid

2× the limit

8.2ng/L

Each block = 4.0 ng/L federal MCL (2024)

EPA UCMR 5 · sampled 2023Evidence

PFHxS

Perfluorohexanesulfonic acid

1.1× the limit

10.9ng/L

Each block = 10 ng/L federal MCL (2024)

EPA UCMR 5 · sampled 2023Evidence

Coverage by group

31 results on record

PFAS (forever chemicals)
3 above · 4 detected · 22 not detected
Metals & lead
1 not detected
Disinfection by-productsNot monitored
Other
1 not detected

Every detected result

7 detected results, by distance from their limit

CAL AM - SUBURBAN ROSEMONT (EPA PWSID CA3410010) delivers surface water to 54,893 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.

Perfluorooctanesulfonic acid (PFOS)EPA UCMR 5 · 2023
4.0 ng/L federal MCL (2024)
13.4ng/L
Above limit
Perfluorooctanoic acid (PFOA)EPA UCMR 5 · 2023
4.0 ng/L federal MCL (2024)
8.2ng/L
Above limit
Perfluorohexanesulfonic acid (PFHxS)EPA UCMR 5 · 2023
10 ng/L federal MCL (2024)
10.9ng/L
Above limit
Perfluorohexanoic acid (PFHxA)EPA UCMR 5 · 2023
400,000 ng/L Michigan EGLE state MCL (strictest US state)
5.4ng/L
Within reference
Perfluorobutanoic acid (PFBA)EPA UCMR 5 · 2023
No federal or state limit; shown for transparency
9ng/L
Detected · no limit
Perfluoroheptanoic acid (PFHpA)EPA UCMR 5 · 2023
No federal or state limit; shown for transparency
4.7ng/L
Detected · no limit
Perfluoropentanoic acid (PFPeA)EPA UCMR 5 · 2023
No federal or state limit; shown for transparency
7.7ng/L
Detected · no limit

24 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
PFBS
PFDA
PFDoA
PFEESA
PFHpS
PFMBA
PFMPA
PFNA
PFPeS
PFTA
PFTrDA
PFUnA
Lithium
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
A tap test can confirm levels at your home before you choose treatment.
Certified lab
How to test your tap →
02 · Treat PFASReverse osmosis, or carbon certified for PFAS
PFOS 13.4 ng/L, above the 4 ng/L limit (+6 more PFAS detected)
NSF/ANSI 58 or 53, with PFHxS/PFOA/PFOS/PFHxA/PFBA/PFHpA/PFPeA named on the listing
Treatment for PFAS →

Understand water treatment technologies →

Commercial

Certified for a concern found here

Each card names which Rosemont 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.

Under-Sink Filter

Aquasana Claryum 2-Stage Under-Sink Filter (AQ-5200)

PFOA: eligible, evidence match
PFOS: eligible, evidence match
Not established: PFHxS, Perfluorohexanoic acid (PFHxA), Perfluorobutanoic acid (PFBA) and 2 more

Not suitable for (5)

Treating every tap in the home
A whole-home hard-water or scale problem
All PFAS: its evidence covers only the compounds it names
Anyone who can't plumb, drill or hire an installer
Renters who can't modify plumbing

See the evidence Check price on Amazon

Under-Sink Filter

Aquasana Claryum 3-Stage Max Flow Under-Sink Filter (AQ-6300M)

PFOA: eligible, evidence match
PFOS: eligible, evidence match
Not established: PFHxS, Perfluorohexanoic acid (PFHxA), Perfluorobutanoic acid (PFBA) and 2 more

Not suitable for (5)

Treating every tap in the home
A whole-home hard-water or scale problem
All PFAS: its evidence covers only the compounds it names
Anyone who can't plumb, drill or hire an installer
Renters who can't modify plumbing

See the evidence Check price on Amazon

See all 9 products certified for a Rosemont concern →

Countertop System

Aquasana Clean Water Machine Countertop Filter (AQ-CWM2)

PFOA: eligible, evidence match
PFOS: eligible, evidence match
Not established: PFHxS, Perfluorohexanoic acid (PFHxA), Perfluorobutanoic acid (PFBA) and 2 more

Not suitable for (3)

Treating every tap in the home
A whole-home hard-water or scale problem
All PFAS: its evidence covers only the compounds it names

See the evidence Check price on Amazon

Countertop System

Patriot Pure Ultimate Water Filtration System

PFOA: eligible, evidence match
PFOS: eligible, evidence match
Not established: PFHxS, Perfluorohexanoic acid (PFHxA), Perfluorobutanoic acid (PFBA) and 2 more

Not suitable for (3)

Treating every tap in the home
A whole-home hard-water or scale problem
All PFAS: its evidence covers only the compounds it names

See the evidence Check price on Amazon

Countertop System

AquaTru Carafe Countertop Reverse-Osmosis Purifier (AT100)

PFOA: eligible, evidence match
PFOS: eligible, evidence match
Not established: PFHxS, Perfluorohexanoic acid (PFHxA), Perfluorobutanoic acid (PFBA) and 2 more

Not suitable for (3)

Treating every tap in the home
A whole-home hard-water or scale problem
All PFAS: its evidence covers only the compounds it names

See the evidence Check price on Amazon

Countertop System

AquaTru Classic Countertop Reverse-Osmosis Purifier (AT2000)

PFOA: eligible, evidence match
PFOS: eligible, evidence match
Not established: PFHxS, Perfluorohexanoic acid (PFHxA), Perfluorobutanoic acid (PFBA) and 2 more

Not suitable for (3)

Treating every tap in the home
A whole-home hard-water or scale problem
All PFAS: its evidence covers only the compounds it names

See the evidence Check price on Amazon

Under-Sink Filter

Waterdrop G3P600 Tankless Reverse-Osmosis System

PFOA: eligible, evidence match
PFOS: eligible, evidence match
Not established: PFHxS, Perfluorohexanoic acid (PFHxA), Perfluorobutanoic acid (PFBA) and 2 more

Not suitable for (5)

Treating every tap in the home
A whole-home hard-water or scale problem
All PFAS: its evidence covers only the compounds it names
Anyone who can't plumb, drill or hire an installer
Renters who can't modify plumbing

See the evidence Check price on Amazon

Under-Sink Filter

Waterdrop G3P800 Tankless Reverse-Osmosis System

PFOA: eligible, evidence match
PFOS: eligible, evidence match
Not established: PFHxS, Perfluorohexanoic acid (PFHxA), Perfluorobutanoic acid (PFBA) and 2 more

Not suitable for (5)

Treating every tap in the home
A whole-home hard-water or scale problem
All PFAS: its evidence covers only the compounds it names
Anyone who can't plumb, drill or hire an installer
Renters who can't modify plumbing

See the evidence Check price on Amazon

Refrigerator Filter

Whirlpool Filter 3 Refrigerator Water Filter (WHR3RXD1)

PFOA: eligible, evidence match
PFOS: eligible, evidence match
Not established: PFHxS, Perfluorohexanoic acid (PFHxA), Perfluorobutanoic acid (PFBA) and 2 more

Not suitable for (3)

Treating every tap in the home
A whole-home hard-water or scale problem
All PFAS: its evidence covers only the compounds it names

See the evidence Check price on Amazon

Questions

Frequently asked questions

Is Rosemont tap water safe to drink?

PurityMap does not give a safe/unsafe verdict; it shows what the public records measured. For Rosemont, PFOS 13.4 ng/L (limit 4 ng/L), PFOA 8.2 ng/L (limit 4 ng/L) and PFHxS 10.9 ng/L (limit 10 ng/L) were measured above their limits in EPA's 2024 testing. CAL AM - SUBURBAN ROSEMONT (PWSID CA3410010) has a Purity Score of 57/100 (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 Rosemont?

CAL AM - SUBURBAN ROSEMONT (PWS ID CA3410010) is the public water system on record for Rosemont, California, serving about 54,893 people. Confirm the utility on your water bill before acting on a specific finding.

Where does Rosemont get its drinking water?

Surface water (primary source of record in EPA SDWIS).

Are PFAS "forever chemicals" in Rosemont's water?

Yes. In EPA's UCMR 5 testing (2023-03-13 to 2024-11-12), PFOS was measured at 13.4 ng/L against a 4 ng/L federal limit, PFOA was measured at 8.2 ng/L against a 4 ng/L federal limit and PFHxS was measured at 10.9 ng/L against a 10 ng/L federal limit. PFHxA (5.4 ng/L, below the 400,000 ng/L state limit) was also detected. PFBA (9 ng/L), PFHpA (4.7 ng/L) and PFPeA (7.7 ng/L) were also detected; they have no federal or state limit. Reverse osmosis and filters certified to NSF/ANSI 53 for PFOA/PFOS reduce them at the tap.

Is there lead in Rosemont's tap water?

Lead is not in Rosemont'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 Rosemont water report show?

PurityMap's current record for Rosemont holds 31 findings: 3 above a reference, 1 detected within the reference, 3 detected with no limit and 24 not detected. Each finding links to its dated public record; a parameter that was never monitored is shown as pending, not as a pass.

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Sources and dataAll 31 records and their sourcesEPA UCMR 5 · EPA SDWIS (Lead & Copper Rule)

Contaminant	Result	Benchmark	Status	Sampled	Source
Perfluorooctanesulfonic acid (PFOS)	13.4 ng/L	4.0 ng/L federal MCL (2024)	Above a historical reference; current applicability unverified	2023-03-13 to 2024-11-12	UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)
Perfluorooctanoic acid (PFOA)	8.2 ng/L	4.0 ng/L federal MCL (2024)	Above a historical reference; current applicability unverified	2023-03-13 to 2024-11-12	UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)
Perfluorohexanesulfonic acid (PFHxS)	10.9 ng/L	10 ng/L federal MCL (2024)	Above a historical reference; current applicability unverified	2023-03-13 to 2024-11-12	UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)
Perfluorohexanoic acid (PFHxA)	5.4 ng/L	400,000 ng/L Michigan EGLE state MCL (strictest US state)	Within a historical reference; current applicability unverified	2023-03-13 to 2024-11-12	UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)
Perfluorobutanoic acid (PFBA)	9 ng/L	No federal or state limit; shown for transparency	Detected, no limit	2023-03-13 to 2024-11-12	UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)
Perfluoroheptanoic acid (PFHpA)	4.7 ng/L	No federal or state limit; shown for transparency	Detected, no limit	2023-03-13 to 2024-11-12	UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)
Perfluoropentanoic acid (PFPeA)	7.7 ng/L	No federal or state limit; shown for transparency	Detected, no limit	2023-03-13 to 2024-11-12	UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)

24 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	2023-03-13 to 2024-11-12	UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)
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	2023-03-13 to 2024-11-12	UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)
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	2023-03-13 to 2024-11-12	UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)
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	2023-03-13 to 2024-11-12	UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)	< 3 ng/L	No federal or state limit; shown for transparency	Not detected above the reporting limit	2023-03-13 to 2024-11-12	UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)
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	2023-03-13 to 2024-11-12	UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)
Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)	< 5 ng/L	10 ng/L federal MCL (2024)	Not detected above the reporting limit	2023-03-13 to 2024-11-12	UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)
Lead (90th percentile)	Non-Detect (ND)	15 µg/L federal action level	Not detected above the reporting limit	2023–2025 monitoring period	Lead & Copper Rule 90th-percentile: CAL AM - SUBURBAN ROSEMONT (CA3410010)
Lithium	< 9 µg/L	10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit	Not detected above the reporting limit	2023-03-13 to 2024-11-12	UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)	< 5 ng/L	No federal or state limit; shown for transparency	Not detected above the reporting limit	2023-03-13 to 2024-11-12	UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)	< 6 ng/L	No federal or state limit; shown for transparency	Not detected above the reporting limit	2023-03-13 to 2024-11-12	UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)	< 20 ng/L	No federal or state limit; shown for transparency	Not detected above the reporting limit	2023-03-13 to 2024-11-12	UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)
Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)	< 3 ng/L	No federal or state limit; shown for transparency	Not detected above the reporting limit	2023-03-13 to 2024-11-12	UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)
Perfluoro-3-methoxypropanoic acid (PFMPA)	< 4 ng/L	No federal or state limit; shown for transparency	Not detected above the reporting limit	2023-03-13 to 2024-11-12	UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)
Perfluoro-4-methoxybutanoic acid (PFMBA)	< 3 ng/L	No federal or state limit; shown for transparency	Not detected above the reporting limit	2023-03-13 to 2024-11-12	UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)
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	2023-03-13 to 2024-11-12	UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)
Perfluorodecanoic acid (PFDA)	< 3 ng/L	No federal or state limit; shown for transparency	Not detected above the reporting limit	2023-03-13 to 2024-11-12	UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)
Perfluorododecanoic acid (PFDoA)	< 3 ng/L	No federal or state limit; shown for transparency	Not detected above the reporting limit	2023-03-13 to 2024-11-12	UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)
Perfluoroheptanesulfonic acid (PFHpS)	< 3 ng/L	No federal or state limit; shown for transparency	Not detected above the reporting limit	2023-03-13 to 2024-11-12	UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)
Perfluorononanoic acid (PFNA)	< 4 ng/L	10 ng/L federal MCL (2024)	Not detected above the reporting limit	2023-03-13 to 2024-11-12	UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)
Perfluoropentanesulfonic acid (PFPeS)	< 4 ng/L	No federal or state limit; shown for transparency	Not detected above the reporting limit	2023-03-13 to 2024-11-12	UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)
Perfluorotetradecanoic acid (PFTA)	< 8 ng/L	No federal or state limit; shown for transparency	Not detected above the reporting limit	2023-03-13 to 2024-11-12	UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)
Perfluorotridecanoic acid (PFTrDA)	< 7 ng/L	No federal or state limit; shown for transparency	Not detected above the reporting limit	2023-03-13 to 2024-11-12	UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)
Perfluoroundecanoic acid (PFUnA)	< 2 ng/L	No federal or state limit; shown for transparency	Not detected above the reporting limit	2023-03-13 to 2024-11-12	UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)

Perfluorooctanesulfonic acid (PFOS)

Result: 13.4 ng/L
Benchmark: 4.0 ng/L federal MCL (2024)
Status: Above a historical reference; current applicability unverified
Sampled: 2023-03-13 to 2024-11-12
Source: UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)

Perfluorooctanoic acid (PFOA)

Result: 8.2 ng/L
Benchmark: 4.0 ng/L federal MCL (2024)
Status: Above a historical reference; current applicability unverified
Sampled: 2023-03-13 to 2024-11-12
Source: UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)

Perfluorohexanesulfonic acid (PFHxS)

Result: 10.9 ng/L
Benchmark: 10 ng/L federal MCL (2024)
Status: Above a historical reference; current applicability unverified
Sampled: 2023-03-13 to 2024-11-12
Source: UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)

Perfluorohexanoic acid (PFHxA)

Result: 5.4 ng/L
Benchmark: 400,000 ng/L Michigan EGLE state MCL (strictest US state)
Status: Within a historical reference; current applicability unverified
Sampled: 2023-03-13 to 2024-11-12
Source: UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)

Perfluorobutanoic acid (PFBA)

Result: 9 ng/L
Benchmark: No federal or state limit; shown for transparency
Status: Detected, no limit
Sampled: 2023-03-13 to 2024-11-12
Source: UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)

Perfluoroheptanoic acid (PFHpA)

Result: 4.7 ng/L
Benchmark: No federal or state limit; shown for transparency
Status: Detected, no limit
Sampled: 2023-03-13 to 2024-11-12
Source: UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)

Perfluoropentanoic acid (PFPeA)

Result: 7.7 ng/L
Benchmark: No federal or state limit; shown for transparency
Status: Detected, no limit
Sampled: 2023-03-13 to 2024-11-12
Source: UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)

24 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: 2023-03-13 to 2024-11-12
Source: UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)

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: 2023-03-13 to 2024-11-12
Source: UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)

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: 2023-03-13 to 2024-11-12
Source: UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)

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: 2023-03-13 to 2024-11-12
Source: UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)

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: 2023-03-13 to 2024-11-12
Source: UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)

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: 2023-03-13 to 2024-11-12
Source: UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)

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: 2023-03-13 to 2024-11-12
Source: UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)

Lead (90th percentile)

Result: Non-Detect (ND)
Benchmark: 15 µg/L federal action level
Status: Not detected above the reporting limit
Sampled: 2023–2025 monitoring period
Source: Lead & Copper Rule 90th-percentile: CAL AM - SUBURBAN ROSEMONT (CA3410010)

Lithium

Result: < 9 µg/L
Benchmark: 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit
Status: Not detected above the reporting limit
Sampled: 2023-03-13 to 2024-11-12
Source: UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)

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: 2023-03-13 to 2024-11-12
Source: UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)

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: 2023-03-13 to 2024-11-12
Source: UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)

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: 2023-03-13 to 2024-11-12
Source: UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)

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: 2023-03-13 to 2024-11-12
Source: UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)

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: 2023-03-13 to 2024-11-12
Source: UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)

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: 2023-03-13 to 2024-11-12
Source: UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)

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: 2023-03-13 to 2024-11-12
Source: UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)

Perfluorodecanoic acid (PFDA)

Result: < 3 ng/L
Benchmark: No federal or state limit; shown for transparency
Status: Not detected above the reporting limit
Sampled: 2023-03-13 to 2024-11-12
Source: UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)

Perfluorododecanoic acid (PFDoA)

Result: < 3 ng/L
Benchmark: No federal or state limit; shown for transparency
Status: Not detected above the reporting limit
Sampled: 2023-03-13 to 2024-11-12
Source: UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)

Perfluoroheptanesulfonic acid (PFHpS)

Result: < 3 ng/L
Benchmark: No federal or state limit; shown for transparency
Status: Not detected above the reporting limit
Sampled: 2023-03-13 to 2024-11-12
Source: UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)

Perfluorononanoic acid (PFNA)

Result: < 4 ng/L
Benchmark: 10 ng/L federal MCL (2024)
Status: Not detected above the reporting limit
Sampled: 2023-03-13 to 2024-11-12
Source: UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)

Perfluoropentanesulfonic acid (PFPeS)

Result: < 4 ng/L
Benchmark: No federal or state limit; shown for transparency
Status: Not detected above the reporting limit
Sampled: 2023-03-13 to 2024-11-12
Source: UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)

Perfluorotetradecanoic acid (PFTA)

Result: < 8 ng/L
Benchmark: No federal or state limit; shown for transparency
Status: Not detected above the reporting limit
Sampled: 2023-03-13 to 2024-11-12
Source: UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)

Perfluorotridecanoic acid (PFTrDA)

Result: < 7 ng/L
Benchmark: No federal or state limit; shown for transparency
Status: Not detected above the reporting limit
Sampled: 2023-03-13 to 2024-11-12
Source: UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)

Perfluoroundecanoic acid (PFUnA)

Result: < 2 ng/L
Benchmark: No federal or state limit; shown for transparency
Status: Not detected above the reporting limit
Sampled: 2023-03-13 to 2024-11-12
Source: UCMR5 Analytical Results: CAL AM - SUBURBAN ROSEMONT (CA3410010)

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: CAL AM - SUBURBAN ROSEMONT (CA3410010)
US EPA
Published
2026-01-15
Newest sample
2024-11-12
Findings here
30
View source ↗Source record
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: CAL AM - SUBURBAN ROSEMONT (CA3410010)
US EPA SDWIS
Published
2026-07-09
Newest sample
2025
Findings here
1
View source ↗Source record

Methodology: how we analyze water.

Data & methodologyHow we analyze waterData integrity policy

Something off with your water's smell, color or taste?

Start with the hot-or-cold tap check. Where Cal Am reported something related, it's shown below.

Rotten-egg smell
Cloudy or milky water
Chlorine smell
Brown or yellow water
Metallic taste
Lead at Cal Am: not detected (90th percentile, 2023–2025 monitoring period). Lead has no taste, so a taste neither shows nor rules it out.