Is Norwalk tap water safe to drink?

Yes with good quality

Norwalk's tap water meets all EPA standards and scores well on our analysis. It is generally safe to drink though filtration can improve taste and provide extra precaution.

82/100
Purity Score
2
Issues Found
3.2 GPG
Hardness
Not detected
PFAS

2 Issues Detected in Norwalk

Moderate Chlorine Level

Chlorine within EPA limits but may affect taste.

Chlorine info for Norwalk

Arsenic Approaching Limit (0.2 mg/L)

EPA limit is 0.010 mg/L.

Arsenic info for Norwalk
Connecticut

68,500,685,106,853 · Norwalk Reservoir system

Water Quality in Norwalk, CT (2026)

Low Risk Updated March 2026 91,184 residents
See Best Filters for Norwalk
82
Purity Score

Residents of Norwalk draw from Norwalk Reservoir system infrastructure managed by South Norwalk Electric and Water. This 2026 analysis evaluates safety, identifies any concerns, and recommends the best home filtration options.

Contaminant Levels

PFAS
ND
Lead
5 ppb
Nitrate
0.4 mg/L
Arsenic
0.2 mg/L
Hardness
3.2 gpg

Health Insights

  • 1
    Chlorine levels may affect the taste of Norwalk's tap water. A carbon filter improves flavor.

Score

82 /100
Good
"Good" threshold (70)

Norwalk tap water is sourced from Norwalk Reservoir system and treated by South Norwalk Electric and Water. Overall purity score: 82/100 (Good). Updated for 2026.

Fix Your Water

Best filters matched to Norwalk's 2 issues.

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Explore Norwalk Water Data

Forever Chemicals in NorwalkPFAS water report
Lead Risk in NorwalkLead water report
Norwalk Hardness ReportScale and minerals
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Norwalk Water FAQ

Is Norwalk CT tap water safe to drink in 2026?
Norwalk tap water meets EPA federal drinking water standards and scores 82/100 (Good) on PurityMap for 2026. For most healthy adults the water is considered safe but point-of-use filtration adds an important layer of protection.
Does Norwalk CT use chlorine or chloramine for disinfection?
Norwalk uses chloramine as the primary disinfectant with a residual level of 1.3 ppm. Chloramine is harder to remove than free chlorine and requires a catalytic carbon or reverse osmosis filter. Standard Brita-style pitchers will NOT remove chloramine.
How hard is Norwalk CT water and what is the TDS level?
Norwalk water hardness is 3.2 grains per gallon (soft) with a TDS of 110 ppm (good). This level is unlikely to cause significant scale buildup in household plumbing.
Has PFAS been found in Norwalk CT drinking water?
Based on available EPA UCMR5 monitoring data as of 2026 PFAS have not been detected above EPA advisory levels in Norwalk drinking water.
What is the best water filter for Norwalk?
Based on Norwalk's water profile, we recommend the Clearly Filtered Water Pitcher. Norwalk has elevated chlorine residuals. An under-sink carbon filter removes chlorine and disinfection byproducts at the tap.

Nearby Reports

BridgeportConnecticut — 77/100WaterburyConnecticut — 77/100New HavenConnecticut — 82/100HartfordConnecticut — 82/100StamfordConnecticut — 82/100DanburyConnecticut — 82/100

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Data Sources

  • EPA SDWIS
  • EWG Tap Water Database
  • South Norwalk Electric and Water CCR
  • USGS monitoring data

PurityMap compiles public data. Updated March 2026.

© 2026 PurityMap. For informational purposes only.

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