Rumsey Hall School, CT
Lead detected, under the action levels
Latest 90th-percentile lead: 1 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.
Who runs the water here
Rumsey Hall School serves about 398 people through 15 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Litchfield County, Connecticut. EPA system ID: CT1501111; phone on file: 860-868-0535. They can tell you what your service line is made of and whether they pay to replace it.
Every lead result on file
Against the period ending 2025 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Rumsey Hall School is 5 ppb across 18 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 1 ppb |
| 2025 | 0 (not detected) |
| 2025 | 0 (not detected) |
| 2024 | 1 ppb |
| 2024 | 1 ppb |
| 2023 | 1 ppb |
| 2023 | 2.11 ppb |
| 2022 | 0.8 ppb |
| 2022 | 2 ppb |
| 2021 | 1.3 ppb |
| 2021 | 1.2 ppb |
| 2020 | 0.9 ppb |
| 2020 | 1 ppb |
| 2019 | 5 ppb |
| 2019 | 1 ppb |
| 2018 | 2 ppb |
| 2017 | 5 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. Rumsey Hall School's 1 ppb sits at the 57th percentile in Connecticut and the 53rd nationally (higher means more lead).
Neighbouring systems
72 other systems share Litchfield County; 36 of them have a higher latest lead result than Rumsey Hall School. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Torrington Water Company | 37,915 | 0 (not detected) |
| Watertown Water & Sewer Authority | 9,972 | 2 ppb |
| Winsted Water Works | 7,784 | 2.6 ppb |
| Watertown Fire District | 6,718 | 2.2 ppb |
| Ctwc - Naugatuck Reg-Terryville System | 5,607 | 0.6 ppb |
| Ctwc - Naugatuck Reg-Thomaston System | 3,789 | 2.8 ppb |
| Aquarion-Litchfield Regional | 3,097 | 2 ppb |
| Aquarion-Salisbury | 1,932 | 0 (not detected) |
| Aquarion-New Hartford | 1,872 | 1.4 ppb |
| Aquarion-North Canaan | 1,481 | 1.3 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Washington, 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 Rumsey Hall School whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1500 ppb (copper action level 1,300 ppb).
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. Size matters more than most people expect: small vs large water systems.