Aquarion-Indian Spring, CT
Lead detected, under the action levels
Latest 90th-percentile lead: 1.3 ppb (monitoring period 2026-2026). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. Lead was measured in sampled homes but the 90th percentile is under both action levels. EPA's health goal for lead is zero, so test your own tap if your home was built before 1986 or anyone in it is pregnant or a young child.
Aquarion-Indian Spring at a glance
Aquarion-Indian Spring serves about 242 people through 91 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Fairfield County, Connecticut. EPA system ID: CT0340191; phone on file: 203-926-4320. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Every lead result on file
That is up 1.3 ppb from 0 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Aquarion-Indian Spring is 3 ppb across 9 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 1.3 ppb |
| 2025 | 0 (not detected) |
| 2024 | 2 ppb |
| 2023 | 2 ppb |
| 2022 | 2 ppb |
| 2021 | 2 ppb |
| 2021 | 2 ppb |
| 2020 | 3 ppb |
| 2017 | 3 ppb |
Against other Connecticut systems
Of the 493 Connecticut systems with a lead result, the median latest reading is 0.8 ppb; 2 are over 15 ppb right now and 49 have gone over at some point. Aquarion-Indian Spring's 1.3 ppb sits at the 63rd percentile in Connecticut and the 60th nationally (higher means more lead).
Neighbouring systems
58 other systems share Fairfield County; 25 of them have a higher latest lead result than Aquarion-Indian Spring. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Aquarion-Eastern Fairfield County | 351,756 | 0 (not detected) |
| Aquarion-Stamford | 119,214 | 0 (not detected) |
| Danbury Water Department | 62,055 | 0 (not detected) |
| Aquarion-Greenwich | 53,297 | 0 (not detected) |
| South Norwalk Electric & Water | 42,000 | 0 (not detected) |
| Norwalk First Taxing District | 40,256 | 0 (not detected) |
| Aquarion-Darien | 18,737 | 2 ppb |
| Aquarion-New Canaan | 10,097 | 0 (not detected) |
| Bethel Water Dept | 9,507 | 0 (not detected) |
| Aquarion-Ridgefield | 7,476 | 3.1 ppb |
Next steps for Shelton, CT
Test your own tap with a certified lab first-draw sample; Shelton, CT may offer free or low-cost kits through the utility. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Aquarion-Indian Spring whether it covers that cost before hiring anyone - many utilities now do.
These figures describe homes the utility sampled, not your tap. Only your service line record or a test of your own water answers the question for your house. Why sampled homes are the worst-case ones is in the guide to reading the number. The action level is dropping - the 10 ppb rule from 2027.