PFOS
1.4× the limitPerfluorooctanesulfonic acid
5.6ng/L
Each block = 4.0 ng/L federal MCL (2024)
EPA UCMR 5 · sampled 2025Evidence
City water report · 2026
Is Montclair 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); 2 more are detected with no federal limit, and everything else measured is within its reference or not detected. Monte Vista WD serves 56,390 residents.
Likely match, check your bill
MONTE VISTA WD serves Montclair
Your water bill or annual water quality report names your actual supplier.
- Source
- Surface water
- Lead service lines
- 0 lead
- MONTE VISTA WDThis reportCA3610029 · 56,390 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 not detected
Every detected result
5 detected results, by distance from their limit
MONTE VISTA WD (EPA PWSID CA3610029) delivers surface water to 56,390 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 · 20254.0 ng/L federal MCL (2024)5.6ng/LAbove limit
- Perfluorohexanesulfonic acid (PFHxS)EPA UCMR 5 · 202510 ng/L federal MCL (2024)7.4ng/LWithin reference
- Perfluorohexanoic acid (PFHxA)EPA UCMR 5 · 2025400,000 ng/L Michigan EGLE state MCL (strictest US state)3.3ng/LWithin reference
- Perfluorobutanoic acid (PFBA)EPA UCMR 5 · 2025No federal or state limit; shown for transparency11ng/LDetected · no limit
- Perfluoropentanoic acid (PFPeA)EPA UCMR 5 · 2025No federal or state limit; shown for transparency3.5ng/LDetected · no limit
26 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
- PFHpA
- PFHpS
- PFMBA
- PFMPA
- PFNA
- PFOA
- 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 labHow to test your tap → - 02 · Treat PFASReverse osmosis, or carbon certified for PFAS
PFOS 5.6 ng/L, above the 4 ng/L limit (+4 more PFAS detected)
NSF/ANSI 58 or 53, with PFOS/PFHxA/PFHxS/PFBA/PFPeA named on the listingTreatment for PFAS →
Commercial
Certified for a concern found here
Each card names which Montclair 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: Perfluorohexanoic acid (PFHxA), PFHxS, Perfluorobutanoic acid (PFBA) and 1 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: Perfluorohexanoic acid (PFHxA), PFHxS, Perfluorobutanoic acid (PFBA) and 1 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 Montclair concern →
Countertop System
Aquasana Clean Water Machine Countertop Filter (AQ-CWM2)
- PFOS: eligible, evidence match
- Not established: Perfluorohexanoic acid (PFHxA), PFHxS, Perfluorobutanoic acid (PFBA) and 1 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: Perfluorohexanoic acid (PFHxA), PFHxS, Perfluorobutanoic acid (PFBA) and 1 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: Perfluorohexanoic acid (PFHxA), PFHxS, Perfluorobutanoic acid (PFBA) and 1 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: Perfluorohexanoic acid (PFHxA), PFHxS, Perfluorobutanoic acid (PFBA) and 1 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: Perfluorohexanoic acid (PFHxA), PFHxS, Perfluorobutanoic acid (PFBA) and 1 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: Perfluorohexanoic acid (PFHxA), PFHxS, Perfluorobutanoic acid (PFBA) and 1 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: Perfluorohexanoic acid (PFHxA), PFHxS, Perfluorobutanoic acid (PFBA) and 1 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 Montclair tap water safe to drink?
PurityMap does not give a safe/unsafe verdict; it shows what the public records measured. For Montclair, PFOS 5.6 ng/L was measured above the 4 ng/L federal limit in EPA's 2024 testing. MONTE VISTA WD (PWSID CA3610029) has a Purity Score of 70/100 (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 Montclair?
MONTE VISTA WD (PWS ID CA3610029) is the public water system on record for Montclair, California, serving about 56,390 people. Confirm the utility on your water bill before acting on a specific finding.
Where does Montclair get its drinking water?
Surface water (primary source of record in EPA SDWIS).
Are PFAS "forever chemicals" in Montclair's water?
Yes. In EPA's UCMR 5 testing (2025-03-18 to 2025-12-22), PFOS was measured at 5.6 ng/L against a 4 ng/L federal limit. PFHxA (3.3 ng/L, below the 400,000 ng/L state limit) and PFHxS (7.4 ng/L, below the 10 ng/L federal limit) were also detected. PFBA (11 ng/L) and PFPeA (3.5 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 Montclair's tap water?
Lead is not in Montclair'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 Montclair water report show?
PurityMap's current record for Montclair holds 31 findings: 1 above a reference, 2 detected within the reference, 2 detected with no limit and 26 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
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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) | 5.6 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2025-03-18 to 2025-12-22 | UCMR5 Analytical Results: MONTE VISTA WD (CA3610029) |
| Perfluorohexanesulfonic acid (PFHxS) | 7.4 ng/L | 10 ng/L federal MCL (2024) | Within a historical reference; current applicability unverified | 2025-03-18 to 2025-12-22 | UCMR5 Analytical Results: MONTE VISTA WD (CA3610029) |
| Perfluorohexanoic acid (PFHxA) | 3.3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Within a historical reference; current applicability unverified | 2025-03-18 to 2025-12-22 | UCMR5 Analytical Results: MONTE VISTA WD (CA3610029) |
| Perfluorobutanoic acid (PFBA) | 11 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2025-03-18 to 2025-12-22 | UCMR5 Analytical Results: MONTE VISTA WD (CA3610029) |
| Perfluoropentanoic acid (PFPeA) | 3.5 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2025-03-18 to 2025-12-22 | UCMR5 Analytical Results: MONTE VISTA WD (CA3610029) |
26 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 | 2025-03-18 to 2025-12-22 | UCMR5 Analytical Results: MONTE VISTA WD (CA3610029) |
| 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 | 2025-03-18 to 2025-12-22 | UCMR5 Analytical Results: MONTE VISTA WD (CA3610029) |
| 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 | 2025-03-18 to 2025-12-22 | UCMR5 Analytical Results: MONTE VISTA WD (CA3610029) |
| 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 | 2025-03-18 to 2025-12-22 | UCMR5 Analytical Results: MONTE VISTA WD (CA3610029) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-18 to 2025-12-22 | UCMR5 Analytical Results: MONTE VISTA WD (CA3610029) |
| 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 | 2025-03-18 to 2025-12-22 | UCMR5 Analytical Results: MONTE VISTA WD (CA3610029) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-18 to 2025-12-22 | UCMR5 Analytical Results: MONTE VISTA WD (CA3610029) |
| 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: MONTE VISTA WD (CA3610029) |
| 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 | 2025-03-18 to 2025-12-22 | UCMR5 Analytical Results: MONTE VISTA WD (CA3610029) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-18 to 2025-12-22 | UCMR5 Analytical Results: MONTE VISTA WD (CA3610029) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-18 to 2025-12-22 | UCMR5 Analytical Results: MONTE VISTA WD (CA3610029) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-18 to 2025-12-22 | UCMR5 Analytical Results: MONTE VISTA WD (CA3610029) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-18 to 2025-12-22 | UCMR5 Analytical Results: MONTE VISTA WD (CA3610029) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-18 to 2025-12-22 | UCMR5 Analytical Results: MONTE VISTA WD (CA3610029) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-18 to 2025-12-22 | UCMR5 Analytical Results: MONTE VISTA WD (CA3610029) |
| 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 | 2025-03-18 to 2025-12-22 | UCMR5 Analytical Results: MONTE VISTA WD (CA3610029) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-18 to 2025-12-22 | UCMR5 Analytical Results: MONTE VISTA WD (CA3610029) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-18 to 2025-12-22 | UCMR5 Analytical Results: MONTE VISTA WD (CA3610029) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-18 to 2025-12-22 | UCMR5 Analytical Results: MONTE VISTA WD (CA3610029) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-18 to 2025-12-22 | UCMR5 Analytical Results: MONTE VISTA WD (CA3610029) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-18 to 2025-12-22 | UCMR5 Analytical Results: MONTE VISTA WD (CA3610029) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-18 to 2025-12-22 | UCMR5 Analytical Results: MONTE VISTA WD (CA3610029) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-18 to 2025-12-22 | UCMR5 Analytical Results: MONTE VISTA WD (CA3610029) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-18 to 2025-12-22 | UCMR5 Analytical Results: MONTE VISTA WD (CA3610029) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-18 to 2025-12-22 | UCMR5 Analytical Results: MONTE VISTA WD (CA3610029) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-18 to 2025-12-22 | UCMR5 Analytical Results: MONTE VISTA WD (CA3610029) |
Perfluorooctanesulfonic acid (PFOS)
- Result
- 5.6 ng/L
- Benchmark
- 4.0 ng/L federal MCL (2024)
- Status
- Above a historical reference; current applicability unverified
- Sampled
- 2025-03-18 to 2025-12-22
Perfluorohexanesulfonic acid (PFHxS)
- Result
- 7.4 ng/L
- Benchmark
- 10 ng/L federal MCL (2024)
- Status
- Within a historical reference; current applicability unverified
- Sampled
- 2025-03-18 to 2025-12-22
Perfluorohexanoic acid (PFHxA)
- Result
- 3.3 ng/L
- Benchmark
- 400,000 ng/L Michigan EGLE state MCL (strictest US state)
- Status
- Within a historical reference; current applicability unverified
- Sampled
- 2025-03-18 to 2025-12-22
- Result
- 11 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Detected, no limit
- Sampled
- 2025-03-18 to 2025-12-22
Perfluoropentanoic acid (PFPeA)
- Result
- 3.5 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Detected, no limit
- Sampled
- 2025-03-18 to 2025-12-22
26 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
- 2025-03-18 to 2025-12-22
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
- 2025-03-18 to 2025-12-22
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
- 2025-03-18 to 2025-12-22
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
- 2025-03-18 to 2025-12-22
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
- 2025-03-18 to 2025-12-22
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
- 2025-03-18 to 2025-12-22
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
- 2025-03-18 to 2025-12-22
- Result
- Non-Detect (ND)
- Benchmark
- 15 µg/L federal action level
- Status
- Not detected above the reporting limit
- Sampled
- 2023–2025 monitoring period
- 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
- 2025-03-18 to 2025-12-22
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
- 2025-03-18 to 2025-12-22
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
- 2025-03-18 to 2025-12-22
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
- 2025-03-18 to 2025-12-22
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
- 2025-03-18 to 2025-12-22
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
- 2025-03-18 to 2025-12-22
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
- 2025-03-18 to 2025-12-22
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
- 2025-03-18 to 2025-12-22
- Result
- < 3 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2025-03-18 to 2025-12-22
Perfluorododecanoic acid (PFDoA)
- Result
- < 3 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2025-03-18 to 2025-12-22
Perfluoroheptanesulfonic acid (PFHpS)
- Result
- < 3 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2025-03-18 to 2025-12-22
Perfluoroheptanoic acid (PFHpA)
- Result
- < 3 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2025-03-18 to 2025-12-22
- Result
- < 4 ng/L
- Benchmark
- 10 ng/L federal MCL (2024)
- Status
- Not detected above the reporting limit
- Sampled
- 2025-03-18 to 2025-12-22
- Result
- < 4 ng/L
- Benchmark
- 4.0 ng/L federal MCL (2024)
- Status
- Not detected above the reporting limit
- Sampled
- 2025-03-18 to 2025-12-22
Perfluoropentanesulfonic acid (PFPeS)
- Result
- < 4 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2025-03-18 to 2025-12-22
Perfluorotetradecanoic acid (PFTA)
- Result
- < 8 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2025-03-18 to 2025-12-22
Perfluorotridecanoic acid (PFTrDA)
- Result
- < 7 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2025-03-18 to 2025-12-22
Perfluoroundecanoic acid (PFUnA)
- Result
- < 2 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2025-03-18 to 2025-12-22
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: MONTE VISTA WD (CA3610029)
US EPA
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: MONTE VISTA WD (CA3610029)
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 Monte Vista WD reported something related, it's shown below.
- Rotten-egg smell
- Cloudy or milky water
- Chlorine smell
- Brown or yellow water
- Metallic taste
Lead at Monte Vista WD: not detected (90th percentile, 2023–2025 monitoring period). Lead has no taste, so a taste neither shows nor rules it out.
ZIP codes in Montclair
A ZIP code is a postal area, not a water service area. Your water bill names your supplier.