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City water profile

Lake Poinsett water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Lake Poinsett, South Dakota.

Median indexed hardness

516PPM

3 indexed ZIPs

Range 516–516 PPM

State comparison
At state median
State hardness rank
#113 of 222
Matched utilities
8
Active health records
0

City summary

What the indexed records say

Lake Poinsett has 3 published ZIP profiles across Kingsbury County and Deuel County and Hamlin County. The indexed median is 516 PPM, compared with 516 PPM across South Dakota.

Among the 222 South Dakotacities with an indexed median, Lake Poinsett ranks #113from highest to lowest. Across all 246 state ZIP profiles, available estimates run from 20.5to 1330 PPM.

The 516–516 PPM range shows how much the available ZIP estimates vary within the city label. At least one estimate is marked low confidence, so observation distance and date deserve extra attention.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs
Moderately hard0 ZIPs
Hard0 ZIPs
Very hard3 ZIPs

3 of 3 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
38.8 miles
Profiles with evidence
3/3

Confidence labels

High: 0Moderate: 0Low: 3

Observation window: Apr 30, 2024 to Apr 30, 2024.

ZIP directory

Water reports in Lake Poinsett

Open a ZIP for site-level provenance and measurements.

ZIP code

57212

Very Hard

516 PPM

Nearest site
44.2 mi
Confidence
Low

View full ZIP evidence →

ZIP code

57234

Very Hard

516 PPM

Nearest site
25 mi
Confidence
Low

View full ZIP evidence →

ZIP code

57248

Very Hard

516 PPM

Nearest site
38.8 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

Kingbrook I Rural Water System

PWSID SD4600431

Groundwater
System population served
6,455
Last reported
Jun 17, 2026

EPA SDWIS explicitly lists this ZIP in the system's served geography.

Kingbrook Iii Rural Water System

PWSID SD4600874

Groundwater
System population served
2,888
Last reported
Jun 17, 2026

EPA SDWIS explicitly lists this ZIP in the system's served geography.

Kingbrook Ii Rural Water System

PWSID SD4600511

Groundwater
System population served
2,715
Last reported
Jun 17, 2026

EPA SDWIS explicitly lists this ZIP in the system's served geography.

Arlington

PWSID SD4600385

Groundwater
System population served
915
Last reported
Jun 17, 2026

EPA SDWIS explicitly lists this ZIP in the system's served geography.

Ramona

PWSID SD4600252

Groundwater
System population served
159
Last reported
Jun 17, 2026

EPA SDWIS explicitly lists this ZIP in the system's served geography.

Spring Lake Colony

PWSID SD4602076

Groundwater
System population served
114
Last reported
Jun 17, 2026

EPA SDWIS explicitly lists this ZIP in the system's served geography.

Estelline

PWSID SD4600119

Groundwater
System population served
749
Last reported
Jun 17, 2026

EPA SDWIS explicitly lists this ZIP in the system's served geography.

Lake Norden

PWSID SD4600187

Groundwater
System population served
554
Last reported
Jun 17, 2026

EPA SDWIS explicitly lists this ZIP in the system's served geography.

Compliance history

What EPA records show

No active health-based violation appears among the associated systems in the represented EPA reporting quarter. This does not mean every contaminant was tested at every tap.

RecordSystemPeriodStatus
Stage 1 Disinfectants and Disinfection Byproducts RuleSD4600119Mar 30, 2023Resolved · health-based

Practical next steps

Move from index to evidence

  1. 1. Open your ZIP. Check distance, dates, confidence, and the associated utility.
  2. 2. Read the current CCR. Confirm source water, detections, limits, ranges, and notices.
  3. 3. Test the tap when needed. Confirm health concerns or treatment sizing with the right method.

Questions people ask

About water in Lake Poinsett

Is the water hard?

The indexed city median is 516 PPM. Open the ZIP report to verify the distance and confidence behind that estimate.

Is the tap water safe?

Compliance history is utility-wide and cannot guarantee conditions at every tap. Check current notices and test when address-specific evidence is needed.

Do I need treatment?

Choose treatment only after confirming the problem at the property. A softener targets hardness; contaminant treatment requires a matching, verified performance claim.