PFOS
2.1× the limitPerfluorooctanesulfonic acid
8.6ng/L
Each block = 4.0 ng/L federal MCL (2024)
EPA UCMR 5 · sampled 2025Evidence
City water report · 2026
Is East Los Angeles Tap Water Safe? 2026 Water Quality Report
Short answer: PFOS is above its federal limit (a 2024 limit that water systems have until at least 2029 to meet); lithium sits above a screening level. California Water Service Co. serves 142,140 residents.
Likely match, check your bill
CALIFORNIA WATER SERVICE CO. - ELA serves East Los Angeles
Your water bill or annual water quality report names your actual supplier.
- Source
- Surface water
- CALIFORNIA WATER SERVICE CO. - ELAThis reportCA1910036 · 142,140 served
What stands out
One PFAS above the 2024 federal limit
The bar is drawn in blocks of the 4.0 ng/L federal MCL (2024), so the length shows how far above it the result sits.
Coverage by group
31 results on record- PFAS (forever chemicals)1 above · 4 detected · 24 not detected
- Metals & lead1 not detected
- Disinfection by-productsNot monitored
- Other1 above
Every detected result
6 detected results, by distance from their limit
CALIFORNIA WATER SERVICE CO. - ELA (EPA PWSID CA1910036) delivers surface water to 142,140 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 · 202510 µg/L EPA health reference level (screening, not a legal limit)47.1µg/LAbove screening
- Perfluorooctanesulfonic acid (PFOS)EPA UCMR 5 · 20254.0 ng/L federal MCL (2024)8.6ng/LAbove limit
- Perfluorobutanesulfonic acid (PFBS)EPA UCMR 5 · 20252,000 ng/L EPA health advisory (screening, not a legal limit)4.9ng/LWithin reference
- Perfluorohexanoic acid (PFHxA)EPA UCMR 5 · 2025400,000 ng/L Michigan EGLE state MCL (strictest US state)7.6ng/LWithin reference
- Perfluorobutanoic acid (PFBA)EPA UCMR 5 · 2025No federal or state limit; shown for transparency8ng/LDetected · no limit
- Perfluoropentanoic acid (PFPeA)EPA UCMR 5 · 2025No federal or state limit; shown for transparency12.9ng/LDetected · no limit
25 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
- PFDA
- PFDoA
- PFEESA
- PFHpA
- PFHpS
- PFHxS
- PFMBA
- PFMPA
- PFNA
- PFOA
- 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
A tap test can confirm levels at your home before you choose treatment.
Certified labHow to test your tap → - 02 · Treat PFASReverse osmosis, or carbon certified for PFAS
PFOS 8.6 ng/L, above the 4 ng/L limit (+4 more PFAS detected)
NSF/ANSI 58 or 53, with PFOS/PFBS/PFHxA/PFBA/PFPeA named on the listingTreatment for PFAS → - 03 · LithiumDepends on the contaminant
Lithium 47.1 µg/L, above the 10.0 µg/L EPA health reference level
The certifier's listing for each named contaminantTreatment for 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
Certified for a concern found here
Each card names which East Los Angeles 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)
- PFOS: eligible, evidence match
- Not established: Lithium, Perfluorobutanesulfonic acid (PFBS), Perfluorohexanoic acid (PFHxA) 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
Under-Sink Filter
Aquasana Claryum 3-Stage Max Flow Under-Sink Filter (AQ-6300M)
- PFOS: eligible, evidence match
- Not established: Lithium, Perfluorobutanesulfonic acid (PFBS), Perfluorohexanoic acid (PFHxA) 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 all 9 products certified for a East Los Angeles concern →
Countertop System
Aquasana Clean Water Machine Countertop Filter (AQ-CWM2)
- PFOS: eligible, evidence match
- Not established: Lithium, Perfluorobutanesulfonic acid (PFBS), Perfluorohexanoic acid (PFHxA) 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
Countertop System
Patriot Pure Ultimate Water Filtration System
- PFOS: eligible, evidence match
- Not established: Lithium, Perfluorobutanesulfonic acid (PFBS), Perfluorohexanoic acid (PFHxA) 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
Countertop System
AquaTru Carafe Countertop Reverse-Osmosis Purifier (AT100)
- PFOS: eligible, evidence match
- Not established: Lithium, Perfluorobutanesulfonic acid (PFBS), Perfluorohexanoic acid (PFHxA) 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
Countertop System
AquaTru Classic Countertop Reverse-Osmosis Purifier (AT2000)
- PFOS: eligible, evidence match
- Not established: Lithium, Perfluorobutanesulfonic acid (PFBS), Perfluorohexanoic acid (PFHxA) 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
Under-Sink Filter
Waterdrop G3P600 Tankless Reverse-Osmosis System
- PFOS: eligible, evidence match
- Not established: Lithium, Perfluorobutanesulfonic acid (PFBS), Perfluorohexanoic acid (PFHxA) 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
Under-Sink Filter
Waterdrop G3P800 Tankless Reverse-Osmosis System
- PFOS: eligible, evidence match
- Not established: Lithium, Perfluorobutanesulfonic acid (PFBS), Perfluorohexanoic acid (PFHxA) 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
Refrigerator Filter
Whirlpool Filter 3 Refrigerator Water Filter (WHR3RXD1)
- PFOS: eligible, evidence match
- Not established: Lithium, Perfluorobutanesulfonic acid (PFBS), Perfluorohexanoic acid (PFHxA) 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
Questions
Frequently asked questions
Is East Los Angeles tap water safe to drink?
PurityMap does not give a safe/unsafe verdict; it shows what the public records measured. For East Los Angeles, PFOS 8.6 ng/L was measured above the 4 ng/L federal limit in EPA's 2024 testing. CALIFORNIA WATER SERVICE CO. - ELA (PWSID CA1910036) 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 East Los Angeles?
CALIFORNIA WATER SERVICE CO. - ELA (PWS ID CA1910036) is the public water system on record for East Los Angeles, California, serving about 142,140 people. Confirm the utility on your water bill before acting on a specific finding.
Where does East Los Angeles get its drinking water?
Surface water (primary source of record in EPA SDWIS).
Are PFAS "forever chemicals" in East Los Angeles's water?
Yes. In EPA's UCMR 5 testing (2025-01-07 to 2025-10-15), PFOS was measured at 8.6 ng/L against a 4 ng/L federal limit. PFBS (4.9 ng/L, below the 2,000 ng/L EPA health advisory) and PFHxA (7.6 ng/L, below the 400,000 ng/L state limit) were also detected. PFBA (8 ng/L) and PFPeA (12.9 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 East Los Angeles's tap water?
Lead is not in East Los Angeles'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 East Los Angeles water report show?
PurityMap's current record for East Los Angeles holds 31 findings: 2 above a reference, 2 detected within the reference, 2 detected with no limit and 25 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 East Los Angeles's water
One email when a new sampling round is published, a result moves above or below its reference, or the system's score changes.
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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 |
|---|---|---|---|---|---|
| Lithium | 47.1 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 | 2025-01-07 to 2025-10-15 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - ELA (CA1910036) |
| Perfluorooctanesulfonic acid (PFOS) | 8.6 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2025-01-07 to 2025-10-15 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - ELA (CA1910036) |
| Perfluorobutanesulfonic acid (PFBS) | 4.9 ng/L | 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit | Within the referenced health-based guidance value | 2025-01-07 to 2025-10-15 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - ELA (CA1910036) |
| Perfluorohexanoic acid (PFHxA) | 7.6 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Within a historical reference; current applicability unverified | 2025-01-07 to 2025-10-15 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - ELA (CA1910036) |
| Perfluorobutanoic acid (PFBA) | 8 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2025-01-07 to 2025-10-15 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - ELA (CA1910036) |
| Perfluoropentanoic acid (PFPeA) | 12.9 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2025-01-07 to 2025-10-15 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - ELA (CA1910036) |
25 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 | 2025-01-07 to 2025-10-15 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - ELA (CA1910036) |
| 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 | 2025-01-07 to 2025-10-15 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - ELA (CA1910036) |
| 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 | 2025-01-07 to 2025-10-15 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - ELA (CA1910036) |
| 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 | 2025-01-07 to 2025-10-15 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - ELA (CA1910036) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-07 to 2025-10-15 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - ELA (CA1910036) |
| 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 | 2025-01-07 to 2025-10-15 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - ELA (CA1910036) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-07 to 2025-10-15 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - ELA (CA1910036) |
| Lead (90th percentile) | Non-Detect (ND) | 15 µg/L federal action level | Not detected above the reporting limit | 2024–2026 monitoring period (still open) | Lead & Copper Rule 90th-percentile: CALIFORNIA WATER SERVICE CO. - ELA (CA1910036) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-07 to 2025-10-15 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - ELA (CA1910036) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-07 to 2025-10-15 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - ELA (CA1910036) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-07 to 2025-10-15 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - ELA (CA1910036) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-07 to 2025-10-15 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - ELA (CA1910036) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-07 to 2025-10-15 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - ELA (CA1910036) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-07 to 2025-10-15 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - ELA (CA1910036) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-07 to 2025-10-15 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - ELA (CA1910036) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-07 to 2025-10-15 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - ELA (CA1910036) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-07 to 2025-10-15 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - ELA (CA1910036) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-07 to 2025-10-15 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - ELA (CA1910036) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-07 to 2025-10-15 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - ELA (CA1910036) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-07 to 2025-10-15 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - ELA (CA1910036) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-07 to 2025-10-15 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - ELA (CA1910036) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-07 to 2025-10-15 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - ELA (CA1910036) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-07 to 2025-10-15 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - ELA (CA1910036) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-07 to 2025-10-15 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - ELA (CA1910036) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-07 to 2025-10-15 | UCMR5 Analytical Results: CALIFORNIA WATER SERVICE CO. - ELA (CA1910036) |
- Result
- 47.1 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
- 2025-01-07 to 2025-10-15
Perfluorooctanesulfonic acid (PFOS)
- Result
- 8.6 ng/L
- Benchmark
- 4.0 ng/L federal MCL (2024)
- Status
- Above a historical reference; current applicability unverified
- Sampled
- 2025-01-07 to 2025-10-15
Perfluorobutanesulfonic acid (PFBS)
- Result
- 4.9 ng/L
- Benchmark
- 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit
- Status
- Within the referenced health-based guidance value
- Sampled
- 2025-01-07 to 2025-10-15
Perfluorohexanoic acid (PFHxA)
- Result
- 7.6 ng/L
- Benchmark
- 400,000 ng/L Michigan EGLE state MCL (strictest US state)
- Status
- Within a historical reference; current applicability unverified
- Sampled
- 2025-01-07 to 2025-10-15
- Result
- 8 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Detected, no limit
- Sampled
- 2025-01-07 to 2025-10-15
Perfluoropentanoic acid (PFPeA)
- Result
- 12.9 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Detected, no limit
- Sampled
- 2025-01-07 to 2025-10-15
25 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
- 2025-01-07 to 2025-10-15
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
- 2025-01-07 to 2025-10-15
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
- 2025-01-07 to 2025-10-15
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
- 2025-01-07 to 2025-10-15
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
- 2025-01-07 to 2025-10-15
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
- 2025-01-07 to 2025-10-15
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
- 2025-01-07 to 2025-10-15
- Result
- Non-Detect (ND)
- Benchmark
- 15 µg/L federal action level
- Status
- Not detected above the reporting limit
- Sampled
- 2024–2026 monitoring period (still open)
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
- 2025-01-07 to 2025-10-15
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
- 2025-01-07 to 2025-10-15
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
- 2025-01-07 to 2025-10-15
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
- 2025-01-07 to 2025-10-15
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
- 2025-01-07 to 2025-10-15
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
- 2025-01-07 to 2025-10-15
- Result
- < 3 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2025-01-07 to 2025-10-15
Perfluorododecanoic acid (PFDoA)
- Result
- < 3 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2025-01-07 to 2025-10-15
Perfluoroheptanesulfonic acid (PFHpS)
- Result
- < 3 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2025-01-07 to 2025-10-15
Perfluoroheptanoic acid (PFHpA)
- Result
- < 3 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2025-01-07 to 2025-10-15
Perfluorohexanesulfonic acid (PFHxS)
- Result
- < 3 ng/L
- Benchmark
- 10 ng/L federal MCL (2024)
- Status
- Not detected above the reporting limit
- Sampled
- 2025-01-07 to 2025-10-15
- Result
- < 4 ng/L
- Benchmark
- 10 ng/L federal MCL (2024)
- Status
- Not detected above the reporting limit
- Sampled
- 2025-01-07 to 2025-10-15
- Result
- < 4 ng/L
- Benchmark
- 4.0 ng/L federal MCL (2024)
- Status
- Not detected above the reporting limit
- Sampled
- 2025-01-07 to 2025-10-15
Perfluoropentanesulfonic acid (PFPeS)
- Result
- < 4 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2025-01-07 to 2025-10-15
Perfluorotetradecanoic acid (PFTA)
- Result
- < 8 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2025-01-07 to 2025-10-15
Perfluorotridecanoic acid (PFTrDA)
- Result
- < 7 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2025-01-07 to 2025-10-15
Perfluoroundecanoic acid (PFUnA)
- Result
- < 2 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2025-01-07 to 2025-10-15
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: CALIFORNIA WATER SERVICE CO. - ELA (CA1910036)
US EPA
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: CALIFORNIA WATER SERVICE CO. - ELA (CA1910036)
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 California Water Service Co. reported something related, it's shown below.
- Rotten-egg smell
- Cloudy or milky water
- Chlorine smell
- Brown or yellow water
- Metallic taste
Lead at California Water Service Co.: not detected (90th percentile, 2024–2026 monitoring period (still open)). Lead has no taste, so a taste neither shows nor rules it out.