PFOS
2.7× the limitPerfluorooctanesulfonic acid
10.7ng/L
Each block = 4.0 ng/L federal MCL (2024)
EPA UCMR 5 · sampled 2023Evidence
City water report · 2026
Is New Haven Tap Water Safe? 2026 Water Quality Report
Short answer: Two PFAS, PFOA and PFOS, are above their federal limits (2024 limits that water systems have until at least 2029 to meet); 1 more is detected with no federal limit, and everything else measured is within its reference or not detected. Regional Water Authority serves 418,900 residents.
Listed match
REGIONAL WATER AUTHORITY serves New Haven
EPA lists this system for the city. Your water bill or annual water quality report names your actual supplier.
- Source
- Surface water
Source: EPA SDWIS 2026Q2.
- REGIONAL WATER AUTHORITYThis reportCT0930011 · 418,900 served
Also supplies: West Haven, Milford, East Haven, North Haven, Ansonia, Orange, Derby, Woodmont
What stands out
Two PFAS above the 2024 federal limit
Each 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.
PFOA
1.8× the limitPerfluorooctanoic acid
7.1ng/L
Each block = 4.0 ng/L federal MCL (2024)
EPA UCMR 5 · sampled 2023Evidence
Coverage by group
31 results on record- PFAS (forever chemicals)2 above · 2 detected · 25 not detected
- Metals & lead1 not detected
- Disinfection by-productsNot monitored
- Other1 not detected
Every detected result
4 detected results, by distance from their limit
REGIONAL WATER AUTHORITY (EPA PWSID CT0930011) delivers surface water to 418,900 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 · 20234.0 ng/L federal MCL (2024)10.7ng/LAbove limit
- Perfluorooctanoic acid (PFOA)EPA UCMR 5 · 20234.0 ng/L federal MCL (2024)7.1ng/LAbove limit
- Perfluorobutanesulfonic acid (PFBS)EPA UCMR 5 · 20232,000 ng/L EPA health advisory (screening, not a legal limit)3.5ng/LWithin reference
- Perfluoropentanoic acid (PFPeA)EPA UCMR 5 · 2023No federal or state limit; shown for transparency3.1ng/LDetected · no limit
27 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
- PFDA
- PFDoA
- PFEESA
- PFHpA
- PFHpS
- PFHxA
- PFHxS
- 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 labHow to test your tap → - 02 · Treat PFASReverse osmosis, or carbon certified for PFAS
PFOS 10.7 ng/L, above the 4 ng/L limit (+3 more PFAS detected)
NSF/ANSI 58 or 53, with PFOA/PFOS/PFBS/PFPeA named on the listingTreatment for PFAS →
Commercial
Certified for a concern found here
Each card names which New Haven 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: Perfluorobutanesulfonic acid (PFBS), Perfluoropentanoic acid (PFPeA)
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)
- PFOA: eligible, evidence match
- PFOS: eligible, evidence match
- Not established: Perfluorobutanesulfonic acid (PFBS), Perfluoropentanoic acid (PFPeA)
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 New Haven concern →
Countertop System
Aquasana Clean Water Machine Countertop Filter (AQ-CWM2)
- PFOA: eligible, evidence match
- PFOS: eligible, evidence match
- Not established: Perfluorobutanesulfonic acid (PFBS), Perfluoropentanoic acid (PFPeA)
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
- PFOA: eligible, evidence match
- PFOS: eligible, evidence match
- Not established: Perfluorobutanesulfonic acid (PFBS), Perfluoropentanoic acid (PFPeA)
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)
- PFOA: eligible, evidence match
- PFOS: eligible, evidence match
- Not established: Perfluorobutanesulfonic acid (PFBS), Perfluoropentanoic acid (PFPeA)
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)
- PFOA: eligible, evidence match
- PFOS: eligible, evidence match
- Not established: Perfluorobutanesulfonic acid (PFBS), Perfluoropentanoic acid (PFPeA)
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
- PFOA: eligible, evidence match
- PFOS: eligible, evidence match
- Not established: Perfluorobutanesulfonic acid (PFBS), Perfluoropentanoic acid (PFPeA)
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
- PFOA: eligible, evidence match
- PFOS: eligible, evidence match
- Not established: Perfluorobutanesulfonic acid (PFBS), Perfluoropentanoic acid (PFPeA)
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)
- PFOA: eligible, evidence match
- PFOS: eligible, evidence match
- Not established: Perfluorobutanesulfonic acid (PFBS), Perfluoropentanoic acid (PFPeA)
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 New Haven tap water safe to drink?
PurityMap does not give a safe/unsafe verdict; it shows what the public records measured. For New Haven, PFOS 10.7 ng/L and PFOA 7.1 ng/L were measured above the 4 ng/L federal limit in EPA's 2024 testing. REGIONAL WATER AUTHORITY (PWSID CT0930011) 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 New Haven?
REGIONAL WATER AUTHORITY (PWS ID CT0930011) is the public water system on record for New Haven, Connecticut, serving about 418,900 people. Confirm the utility on your water bill before acting on a specific finding.
Where does New Haven get its drinking water?
Surface water (primary source of record in EPA SDWIS).
Are PFAS "forever chemicals" in New Haven's water?
Yes. In EPA's UCMR 5 testing (2023-09-18 to 2024-06-11), PFOS was measured at 10.7 ng/L against a 4 ng/L federal limit and PFOA was measured at 7.1 ng/L against a 4 ng/L federal limit. PFBS (3.5 ng/L, below the 2,000 ng/L EPA health advisory) was also detected. PFPeA (3.1 ng/L) was also detected; it has 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 New Haven's tap water?
Lead is not in New Haven'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 New Haven water report show?
PurityMap's current record for New Haven holds 31 findings: 2 above a reference, 1 detected within the reference, 1 detected with no limit and 27 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 New Haven'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 |
|---|---|---|---|---|---|
| Perfluorooctanesulfonic acid (PFOS) | 10.7 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2023-09-18 to 2024-06-11 | UCMR5 Analytical Results: REGIONAL WATER AUTHORITY (CT0930011) |
| Perfluorooctanoic acid (PFOA) | 7.1 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2023-09-18 to 2024-06-11 | UCMR5 Analytical Results: REGIONAL WATER AUTHORITY (CT0930011) |
| Perfluorobutanesulfonic acid (PFBS) | 3.5 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 | 2023-09-18 to 2024-06-11 | UCMR5 Analytical Results: REGIONAL WATER AUTHORITY (CT0930011) |
| Perfluoropentanoic acid (PFPeA) | 3.1 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2023-09-18 to 2024-06-11 | UCMR5 Analytical Results: REGIONAL WATER AUTHORITY (CT0930011) |
27 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 | 2023-09-18 to 2024-06-11 | UCMR5 Analytical Results: REGIONAL WATER AUTHORITY (CT0930011) |
| 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 | 2023-09-18 to 2024-06-11 | UCMR5 Analytical Results: REGIONAL WATER AUTHORITY (CT0930011) |
| 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 | 2023-09-18 to 2024-06-11 | UCMR5 Analytical Results: REGIONAL WATER AUTHORITY (CT0930011) |
| 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 | 2023-09-18 to 2024-06-11 | UCMR5 Analytical Results: REGIONAL WATER AUTHORITY (CT0930011) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-18 to 2024-06-11 | UCMR5 Analytical Results: REGIONAL WATER AUTHORITY (CT0930011) |
| 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 | 2023-09-18 to 2024-06-11 | UCMR5 Analytical Results: REGIONAL WATER AUTHORITY (CT0930011) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-09-18 to 2024-06-11 | UCMR5 Analytical Results: REGIONAL WATER AUTHORITY (CT0930011) |
| 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: REGIONAL WATER AUTHORITY (CT0930011) |
| 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 | 2023-09-18 to 2024-06-11 | UCMR5 Analytical Results: REGIONAL WATER AUTHORITY (CT0930011) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-18 to 2024-06-11 | UCMR5 Analytical Results: REGIONAL WATER AUTHORITY (CT0930011) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-18 to 2024-06-11 | UCMR5 Analytical Results: REGIONAL WATER AUTHORITY (CT0930011) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-18 to 2024-06-11 | UCMR5 Analytical Results: REGIONAL WATER AUTHORITY (CT0930011) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-18 to 2024-06-11 | UCMR5 Analytical Results: REGIONAL WATER AUTHORITY (CT0930011) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-18 to 2024-06-11 | UCMR5 Analytical Results: REGIONAL WATER AUTHORITY (CT0930011) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-18 to 2024-06-11 | UCMR5 Analytical Results: REGIONAL WATER AUTHORITY (CT0930011) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-18 to 2024-06-11 | UCMR5 Analytical Results: REGIONAL WATER AUTHORITY (CT0930011) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-18 to 2024-06-11 | UCMR5 Analytical Results: REGIONAL WATER AUTHORITY (CT0930011) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-18 to 2024-06-11 | UCMR5 Analytical Results: REGIONAL WATER AUTHORITY (CT0930011) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-18 to 2024-06-11 | UCMR5 Analytical Results: REGIONAL WATER AUTHORITY (CT0930011) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-18 to 2024-06-11 | UCMR5 Analytical Results: REGIONAL WATER AUTHORITY (CT0930011) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-09-18 to 2024-06-11 | UCMR5 Analytical Results: REGIONAL WATER AUTHORITY (CT0930011) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2023-09-18 to 2024-06-11 | UCMR5 Analytical Results: REGIONAL WATER AUTHORITY (CT0930011) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-09-18 to 2024-06-11 | UCMR5 Analytical Results: REGIONAL WATER AUTHORITY (CT0930011) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-18 to 2024-06-11 | UCMR5 Analytical Results: REGIONAL WATER AUTHORITY (CT0930011) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-18 to 2024-06-11 | UCMR5 Analytical Results: REGIONAL WATER AUTHORITY (CT0930011) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-18 to 2024-06-11 | UCMR5 Analytical Results: REGIONAL WATER AUTHORITY (CT0930011) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-18 to 2024-06-11 | UCMR5 Analytical Results: REGIONAL WATER AUTHORITY (CT0930011) |
Perfluorooctanesulfonic acid (PFOS)
- Result
- 10.7 ng/L
- Benchmark
- 4.0 ng/L federal MCL (2024)
- Status
- Above a historical reference; current applicability unverified
- Sampled
- 2023-09-18 to 2024-06-11
- Result
- 7.1 ng/L
- Benchmark
- 4.0 ng/L federal MCL (2024)
- Status
- Above a historical reference; current applicability unverified
- Sampled
- 2023-09-18 to 2024-06-11
Perfluorobutanesulfonic acid (PFBS)
- Result
- 3.5 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
- 2023-09-18 to 2024-06-11
Perfluoropentanoic acid (PFPeA)
- Result
- 3.1 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Detected, no limit
- Sampled
- 2023-09-18 to 2024-06-11
27 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
- 2023-09-18 to 2024-06-11
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
- 2023-09-18 to 2024-06-11
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
- 2023-09-18 to 2024-06-11
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
- 2023-09-18 to 2024-06-11
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
- 2023-09-18 to 2024-06-11
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
- 2023-09-18 to 2024-06-11
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
- 2023-09-18 to 2024-06-11
- 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)
- 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
- 2023-09-18 to 2024-06-11
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
- 2023-09-18 to 2024-06-11
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
- 2023-09-18 to 2024-06-11
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
- 2023-09-18 to 2024-06-11
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
- 2023-09-18 to 2024-06-11
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
- 2023-09-18 to 2024-06-11
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
- 2023-09-18 to 2024-06-11
- Result
- < 5 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2023-09-18 to 2024-06-11
- Result
- < 3 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2023-09-18 to 2024-06-11
Perfluorododecanoic acid (PFDoA)
- Result
- < 3 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2023-09-18 to 2024-06-11
Perfluoroheptanesulfonic acid (PFHpS)
- Result
- < 3 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2023-09-18 to 2024-06-11
Perfluoroheptanoic acid (PFHpA)
- Result
- < 3 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2023-09-18 to 2024-06-11
Perfluorohexanesulfonic acid (PFHxS)
- Result
- < 3 ng/L
- Benchmark
- 10 ng/L federal MCL (2024)
- Status
- Not detected above the reporting limit
- Sampled
- 2023-09-18 to 2024-06-11
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
- 2023-09-18 to 2024-06-11
- Result
- < 4 ng/L
- Benchmark
- 10 ng/L federal MCL (2024)
- Status
- Not detected above the reporting limit
- Sampled
- 2023-09-18 to 2024-06-11
Perfluoropentanesulfonic acid (PFPeS)
- Result
- < 4 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2023-09-18 to 2024-06-11
Perfluorotetradecanoic acid (PFTA)
- Result
- < 8 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2023-09-18 to 2024-06-11
Perfluorotridecanoic acid (PFTrDA)
- Result
- < 7 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2023-09-18 to 2024-06-11
Perfluoroundecanoic acid (PFUnA)
- Result
- < 2 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2023-09-18 to 2024-06-11
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: REGIONAL WATER AUTHORITY (CT0930011)
US EPA
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: REGIONAL WATER AUTHORITY (CT0930011)
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 Regional Water Authority reported something related, it's shown below.
- Rotten-egg smell
- Cloudy or milky water
- Chlorine smell
- Brown or yellow water
- Metallic taste
Lead at Regional Water Authority: not detected (90th percentile, 2024–2026 monitoring period (still open)). Lead has no taste, so a taste neither shows nor rules it out.
ZIP codes in New Haven
A ZIP code is a postal area, not a water service area. Your water bill names your supplier.