New Canaan, CT · PWSID CT1030011
Norwalk First Taxing District lead service lines
195 lead or galvanized lines to replace
Norwalk First Taxing District reported 91 lead and 104 galvanized-requiring-replacement service lines out of 11,042 in its inventory. That's about 1 in 57 lines. Another 4,700 (43%) are still listed as unknown material.
Ranks #10 of 71 Connecticut systems with confirmed lead lines, and #1,273 nationally.
1.8% of Norwalk First Taxing District's service lines are lead or galvanized requiring replacement. That's about the same as the Connecticut average (1.6%) and lower than the national average (3.1%).
- Lead 0.8%
- Galvanized (replace) 0.9%
- Unknown 43%
- Non-lead 56%
Total service lines reported: 11,042. Reported all required service line types. Population served: 40,256; 11,042 connections.
Lead test results
Norwalk First Taxing District's most recent 90th-percentile lead result (2025) was not detected, below both the 15 ppb action level and the 10 ppb level that takes effect in 2027. This means 90% of homes sampled were at or below that level; individual homes, especially those with lead lines, can be higher.
Lead and Copper Rule 90th-percentile results reported to EPA, in parts per billion. Dashed lines: 15 ppb action level and the 10 ppb level from November 1, 2027.
Progress since 2025 Q1
Reported lead and galvanized-requiring-replacement lines went from 195 in 2025 Q1 to 195 in 2026 Q3: no change. Lines of unknown material went from 4,700 to 4,700, no change.
Quarterly counts reported to EPA. A drop usually means lines were replaced or confirmed non-lead; a rise usually means more lines were identified. Replacement progress rankings.
Lead rule violations
EPA's data lists 1 Lead and Copper Rule violation since 2015 for Norwalk First Taxing District. Health-based violations are treatment failures, such as corrosion control or public education; the rest are missed monitoring or reporting.
| Began | Violation | Status |
|---|---|---|
| Dec 2021 | Lead consumer notice not delivered or reported | Returned to compliance |
Source: EPA SDWIS violation records for the Lead and Copper Rule.
Where the water comes from
Norwalk First Taxing District's main water source is surface water (rivers, lakes or reservoirs). It buys treated water from Aquarion-Eastern Fairfield County. The seller treats the water, including corrosion control that keeps lead from dissolving out of pipes, while Norwalk First Taxing District is responsible for its own service line inventory and replacement program. It sells water to 1 other water system: Aquarion-Eastern Fairfield County.
Source: EPA SDWIS water system and facility records.
Check your own address
These counts cover the whole system. To see whether your line is lead, use the utility's address-level inventory. Utilities had to prepare one by October 16, 2024 and make it publicly accessible; systems serving more than 50,000 people must post it online.
No map yet? Do the 2-minute scratch and magnet test on the pipe where water enters your home.
Protect your drinking water now
If your line is lead, galvanized or unknown, filter water for drinking, cooking and baby formula. Use a filter certified to NSF/ANSI 53 for lead. Run cold water for a few minutes after it sits for hours, and never use hot tap water for cooking.
How to pick a lead-certified filter · How to test your water for lead
Getting the line replaced
EPA's Lead and Copper Rule Improvements require most systems to replace lead and galvanized-requiring-replacement lines by December 31, 2037. Ask Norwalk First Taxing District whether it replaces the private side for free or with a cost share before you hire anyone. If you want it done sooner, or your utility doesn't cover your side, a licensed plumber can quote it. What replacement costs.
County pages: Lead pipes in Fairfield County
ZIP codes served
ZIP codes whose center falls inside Norwalk First Taxing District's mapped service area (EPA service area boundaries). Neighboring utilities may serve parts of the same ZIP.
06851
Other water systems nearby
| System | Lead + galv. | Unknown |
|---|---|---|
| Aquarion-Eastern Fairfield County | 4,271 | 63,008 |
| Aquarion-Stamford | 116 | 15,227 |
| Aquarion-Greenwich | 1,686 | 13,162 |
| South Norwalk Electric & Water | 54 | 6,463 |
| Aquarion-Darien | 110 | 4,427 |
| Aquarion-New Milford Regional | 41 | 5,052 |
| Aquarion-New Canaan | 40 | 3,297 |
| Bethel Water Dept | 35 | 1,397 |
Check another water system
Questions
Does Norwalk First Taxing District have lead pipes?
Yes. Norwalk First Taxing District reported 91 lead service lines and 104 galvanized lines that must be replaced, out of 11,042 total. 4,700 more are of unknown material.
How do I check if my home's service line is lead?
Look up your address on Norwalk First Taxing District's official service line inventory, which utilities must make publicly available. You can also scratch the pipe where it enters your home: lead is soft, dull gray, scratches to shiny silver and does not attract a magnet.
When will Norwalk First Taxing District replace lead service lines?
Under EPA's Lead and Copper Rule Improvements, most systems must replace lead and galvanized-requiring-replacement lines by December 31, 2037, starting from November 1, 2027. The rule is being challenged in court, so dates could change. Many utilities run free or cost-share programs now.
Has Norwalk First Taxing District had lead violations?
EPA's data shows 1 Lead and Copper Rule violation since 2015 for Norwalk First Taxing District.
Which water filters remove lead?
Use a filter certified to NSF/ANSI Standard 53 for lead reduction, or NSF/ANSI 58 for reverse osmosis. Check the certification on NSF's listings, not just the box.
Embed or cite this data
Local news sites, blogs and community groups can embed this card. It updates when EPA releases new data.
Citation: Lead Pipe Map, "Norwalk First Taxing District lead service lines," https://leadpipemap.com/ct/norwalk-first-taxing-district/. Source: EPA SDWIS service line inventory, 2026 Q3. Download the full dataset on the data page.