Photo: JERRYE AND ROY KLOTZ MD · CC BY-SA 3.0Living in Clear Lake, SD: what to set up and who to call
The Clear Lake water system has a clean five-year EPA record, but its latest lead result, 8.0 ppb, was higher than 97% of similar systems’ (the action level is 15). Fiber reaches 100% of addresses in Clear Lake.
I’m new in town
What to set up in Clear Lake, and who provides it. Tap an answer for the details and where they come from.
Power, water and internet
Who to call to start service at a new address in Clear Lake.
Power comes from NorthWestern Energy
NorthWestern Energy (NorthWestern Energy - (SD)), an investor-owned utility, serves all of Clear Lake. Its homes paid an average of 13.3¢ per kWh in 2025, about $125 a month (its average across South Dakota).
Start or move service: northwesternenergy.com · (800) 245-6977
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Clear Lake water system
The Clear Lake water system supplies Clear Lake: about 56% of residents live in its service area. Brookings-Deuel Rural Water System serves another 45%. About 14% of homes are outside any mapped community water system, most likely on private wells, which EPA doesn’t regulate. It buys treated ground water (EPA lists Brookings-Deuel Rural Water System as seller) and serves 1,218 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 78% of the 7,966 systems serving 1,001–3,300 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan–Dec 2023, was 8.0 ppb, below the 15 ppb action level that applied. That’s higher than 97% of similar systems’ latest results.
The system’s full record: EPA ECHO report
EPA SDWIS via Envirofacts (violations pulled Oct 9, 2026) and ECHO (lead samples, 2026Q3); service area: EPA Community Water System Service Area Boundaries v3.0. Violations are counted by the start of their compliance period. SD4600092.
2 home internet providers serve Clear Lake
100% of 580 addresses can get 100/20 Mbps; 100% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| ITC | Fiber | 100% | 1,000/1,000 |
| T-Mobile | Fixed wireless | 79% | 100/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Clear Lake’s trash rules yet
Pickup rules, the dump and recycling in Clear Lake.
Where your child goes to school
Public school districts and the school path by grade.
Clear Lake is in Deuel School District 19-4.
C+School gradeSee Schools →U.S. Department of Education, NCES Common Core of Data, 2024–25. Enrollment rules and registration are the district’s.
Town hall and registering to vote
Who to call, and how to register.
Election office: FVAP local election office directory, updated Sep 2025; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Aug 3, 2026.
Clear Lake is in ZIP code 57226
ZIP codes where Clear Lake residents live, with the share of the town in each.
| ZIP | Post office name | Share of Clear Lake | ZIP’s residents in Clear Lake |
|---|---|---|---|
| 57226 | Clear Lake, SD | 100% | 60% |
Census 2020 ZIP Code Tabulation Areas, by census block; post office names: GeoNames (CC BY 4.0). ZIPs created since 2020 are missing.
Getting around, the ER and the library
One line each; the subject pages have the rest.
ER: CMS hospital data. Library: IMLS Public Libraries Survey, FY2024.
Questions about living in Clear Lake
Who supplies Clear Lake’s drinking water, and has it had violations?
The Clear Lake water system (EPA ID SD4600092). It reported no health-based violations to EPA in the five years to October 2026; 78% of systems its size had none. Its latest lead 90th percentile was 8.0 ppb (Jan–Dec 2023), against a 15 ppb action level.
Who provides electricity in Clear Lake?
NorthWestern Energy (NorthWestern Energy - (SD)), an investor-owned utility. Its homes paid about 13.3¢ per kWh in 2025 (EIA).
What internet providers serve Clear Lake?
ITC, T-Mobile (FCC, as of December 2025).
What ZIP codes are in Clear Lake?
57226. Census 2020 ZIP Code Tabulation Areas.
What school district is Clear Lake in?
Deuel School District 19-4.
How do I register to vote in Clear Lake?
South Dakota has no online registration; you can register in person until 15 days before Election Day or by mail (received 15 days before). Elections here are run by the Deuel County Auditor. Check your registration at vip.sdsos.gov.
Sources & dates
Every answer above names its source. Here they are with their dates.
- Water: EPA SDWIS (Envirofacts, pulled Oct 9, 2026), ECHO SDWA 2026Q3, EPA CWS Service Area Boundaries v3.0.
- Power: HIFLD Electric Retail Service Territories (map Aug 2023); EIA-861 final 2025.
- Trash: OpenStreetMap, Geofabrik extract of Oct 9, 2026. © OpenStreetMap contributors (ODbL).
- ZIP codes: Census 2020 ZCTA relationship files; GeoNames postal codes (CC BY 4.0).
- Schools: NCES Common Core of Data, 2024–25.
- Registration: vote.gov, updated Aug 3, 2026 (read Oct 10, 2026). Official sites and area codes: Wikidata.
- Election office: FVAP local election office directory (fetched Oct 10, 2026; each record dated), EAC EAVS 2024 jurisdictions; registration and lookup links from vote.gov’s state data, checked Oct 10, 2026.
- Internet: FCC National Broadband Map, as of December 2025.