Ctwc - Marlborough Gardens, CT
Lead detected, under the action levels
Latest 90th-percentile lead: 0.5 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.
Ctwc - Marlborough Gardens at a glance
Ctwc - Marlborough Gardens serves about 110 people through 38 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Hartford County, Connecticut. EPA system ID: CT0790031; phone on file: 860-944-9655. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
That is down 1.7 ppb from 2.2 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Ctwc - Marlborough Gardens is 8.5 ppb across 9 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0.5 ppb |
| 2025 | 2.2 ppb |
| 2025 | 0 (not detected) |
| 2024 | 0 (not detected) |
| 2024 | 2.5 ppb |
| 2023 | 2.7 ppb |
| 2023 | 8.5 ppb |
| 2021 | 4 ppb |
| 2018 | 6.9 ppb |
How Ctwc - Marlborough Gardens 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. Ctwc - Marlborough Gardens's 0.5 ppb sits at the 43rd percentile in Connecticut and the 43rd nationally (higher means more lead).
Nearby utilities
46 other systems share Hartford County; 18 of them have a higher latest lead result than Ctwc - Marlborough Gardens. 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 |
| Aquarion-Simsbury Regional | 14,691 | 0.3 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Clinton, 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 Ctwc - Marlborough Gardens 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. The lead result guide covers how utilities pick the homes they sample. Systems that went over once often dip back under; here is what that means.