39 Hop Brook Rd - Apt Complex, CT
Lead detected, under the action levels
Latest 90th-percentile lead: 0.2 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.
About 39 Hop Brook Rd - Apt Complex
39 Hop Brook Rd - Apt Complex serves about 36 people through 12 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: CT0189971; phone on file: 203-241-5188. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Every lead result on file
Against the period ending 2025 (0.3 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for 39 Hop Brook Rd - Apt Complex is 1.6 ppb across 12 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0.2 ppb |
| 2025 | 0.3 ppb |
| 2025 | 0 (not detected) |
| 2024 | 0.53 ppb |
| 2024 | 0 (not detected) |
| 2023 | 0 (not detected) |
| 2023 | 0 (not detected) |
| 2022 | 1.6 ppb |
| 2021 | 0 (not detected) |
| 2018 | 0 (not detected) |
| 2017 | 1 ppb |
| 2016 | 0 (not detected) |
Where this result ranks
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. 39 Hop Brook Rd - Apt Complex's 0.2 ppb sits at the 42nd percentile in Connecticut and the 41st nationally (higher means more lead).
Neighbouring systems
58 other systems share Fairfield County; 37 of them have a higher latest lead result than 39 Hop Brook Rd - Apt Complex. 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 |
Your move
Test your own tap with a certified lab first-draw sample; Brookfield, 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 39 Hop Brook Rd - Apt Complex 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. What a 90th-percentile result does and does not tell you: how to read a lead result. The action level is dropping - the 10 ppb rule from 2027.