Aquarion-Simsbury Regional, CT
Lead detected, under the action levels
Latest 90th-percentile lead: 0.3 ppb (monitoring period 2025-2025). 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-Simsbury Regional at a glance
Aquarion-Simsbury Regional serves about 14,691 people through 5,747 service connections, which makes it a large system under EPA's size classes. It is privately owned and draws groundwater, in Hartford County, Connecticut. EPA system ID: CT1280021; phone on file: 203-926-4320. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Aquarion-Simsbury Regional's lead record
Against the period ending 2025 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Aquarion-Simsbury Regional is 4 ppb across 10 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0.3 ppb |
| 2025 | 0 (not detected) |
| 2024 | 0 (not detected) |
| 2024 | 0 (not detected) |
| 2023 | 0 (not detected) |
| 2023 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2019 | 4 ppb |
| 2016 | 4 ppb |
How Aquarion-Simsbury Regional compares
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-Simsbury Regional's 0.3 ppb sits at the 43rd percentile in Connecticut and the 42nd nationally (higher means more lead).
Other water systems in Hartford County
46 other systems share Hartford County; 20 of them have a higher latest lead result than Aquarion-Simsbury Regional. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Metropolitan District Commission | 390,887 | 0 (not detected) |
| Ctwc - Northern Reg-Western System | 101,313 | 0 (not detected) |
| New Britain Water Department | 73,534 | 0 (not detected) |
| Bristol Water Department | 52,079 | 0 (not detected) |
| Manchester Water Department | 51,198 | 0 (not detected) |
| Southington Water Department | 43,069 | 0 (not detected) |
| Hazardville Water Company | 18,544 | 0.7 ppb |
| Aquarion-Plainville Regional | 18,231 | 0 (not detected) |
| Ctwc - Unionville System | 14,693 | 2.4 ppb |
| Avon Water Co | 11,590 | 0 (not detected) |
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-Simsbury Regional 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.