Photo: JERRYE AND ROY KLOTZ MD · CC BY-SA 3.0Living in Clark, SD: what to set up and who to call
Trash goes out on Fridays in Clark. Tap water in most of Clark comes from Clark Rural Water System, which has a clean five-year EPA record (about 22% of systems its size had a health-based violation) and a latest lead result below detection.
I’m new in town
What to set up in Clark, 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 Clark.
Power comes from NorthWestern Energy
NorthWestern Energy (NorthWestern Energy - (SD)), an investor-owned utility, serves all of Clark. 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 Clark Rural Water System
Clark Rural Water System supplies Clark: about 51% of residents live in its service area. About 49% of homes are outside any mapped community water system, most likely on private wells, which EPA doesn’t regulate. It draws ground water and serves 2,325 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 2025, was 0.0 ppb, below the 15 ppb action level that applied. The highest in five years was 1.0 ppb. Results below detection are reported as 0, so 0 doesn’t mean no lead at any tap.
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. SD4600881.
2 home internet providers serve Clark
100% of 633 addresses can get 100/20 Mbps; 100% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| ITC | Fiber | 99% | 1,000/1,000 |
| Verizon | Fixed wireless | 52% | 25/6 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
Trash day in Clark is Friday
Pickup days, the drop-off and recycling in Clark, from the town’s own site.
This month
- TrashEvery week
- RecyclingTwice a month, Fri · which week: cityofclark.com
Single-stream recycling
All your recyclables go in one bin, no sorting.
From cityofclark.com, the town’s official site, checked Oct 23, 2026; pages dated Copyright © 2025. Rules change: the town’s page is the last word. .
Where your child goes to school
Public school districts and the school path by grade.
Clark is in Clark School District 12-2.
DSchool 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 Jul 2023; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Aug 3, 2026.
Clark is in ZIP code 57225
ZIP codes where Clark residents live, with the share of the town in each.
| ZIP | Post office name | Share of Clark | ZIP’s residents in Clark |
|---|---|---|---|
| 57225 | Clark, SD | 100% | 66% |
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 Clark
Who supplies Clark’s drinking water, and has it had violations?
Clark Rural Water System (EPA ID SD4600881). 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 0.0 ppb (Jan–Dec 2025), against a 15 ppb action level.
Who provides electricity in Clark?
NorthWestern Energy (NorthWestern Energy - (SD)), an investor-owned utility. Its homes paid about 13.3¢ per kWh in 2025 (EIA).
What internet providers serve Clark?
ITC, Verizon (FCC, as of December 2025).
What ZIP codes are in Clark?
57225. Census 2020 ZIP Code Tabulation Areas.
What school district is Clark in?
Clark School District 12-2.
How do I register to vote in Clark?
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 Clark 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: Clark’s own website (cityofclark.com), read Oct 23, 2026, pickup and drop-off facts extracted and checked against the page they came from.
- 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.