Is tap water safe in Angostura?

EPA SDWIS shows no active health-based violation in this profile's reporting window. That is not the same as proving every contaminant is absent, and federal data can lag state and utility records.

How hard is the water in Angostura, SD?

Nearby USGS observations produce an estimate of 525.5 ppm (30.7 grains per gallon), classified as very hard. This is not a tap measurement.

Do I need a water softener in ZIP code 57747?

At 525.5 ppm, a correctly sized whole-house softener can reduce scale buildup and hard-water spotting. Treatment for hardness does not remove all health-related contaminants.

City water profile

Angostura water quality

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

Median indexed hardness

526PPM

One indexed ZIP

Range 525.5–525.5 PPM

State comparison: 10 PPM above
State hardness rank: #88 of 222
Matched utilities: 9
Active health records: 0

City summary

What the indexed records say

Angostura has 1 published ZIP profile across Fall River County. The indexed median is 526 PPM, compared with 516 PPM across South Dakota.

Among the 222 South Dakotacities with an indexed median, Angostura ranks #88from highest to lowest. Across all 246 state ZIP profiles, available estimates run from 20.5to 1330 PPM.

Because only one ZIP is represented, the city median and range are the same local estimate. It should not be read as multiple independent samples across the community. 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 hard1 ZIP

1 of 1 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance: 25.9 miles
Profiles with evidence: 1/1

Confidence labels

High: 0Moderate: 0Low: 1

Observation window: May 9, 2016 to Nov 20, 2024.

ZIP directory

Water reports in Angostura

Open a ZIP for site-level provenance and measurements.

ZIP code

57747

Very Hard

525.5 PPM

Nearest site: 25.9 mi
Confidence: Low

View full ZIP evidence →

Public water systems

Utilities associated with this city