City water profile

Water hardness in Buffalo Gap

Find official utility reports, understand hardness, and check the water system serving your home in Buffalo Gap, South Dakota.

Utility-reported hardness

Not yet available

Check your provider and source →

State comparison: Unavailable
Evidence comparison rank: —
Matched utilities: 1
Active health records: 1

Your tap water

What does the utility report?

Match the utility name to your water bill. These results describe the utility’s water, not a test at your home. A ZIP can include several water systems.

Utility hardness unavailable in this index

Nearby river or groundwater samples cannot tell us the hardness coming out of your tap. Ask your water provider for total hardness as CaCO₃, or test it at home.

Find an official utility report →

Convert a hardness result →Test your tap →

Match the name on your water bill

Your utility’s measurements and compliance records

These are possible serving systems. A record for one system does not apply to every home in this ZIP. Confirm your provider before interpreting a measurement or notice. Federal records can lag current utility notices.

EPA snapshot: 2026Q2. Historical window begins Jan 1, 2021.

Buffalo Gap

SD4600077 · Groundwater · 126 people served system-wide

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

1 reported active health-based record(s) for this system

Find this utility’s official report →

Measurements (1)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level

Reported level: 0.002 mg/L
Action level: 0.015 mg/L

13% of the listed benchmark

Monitoring period: Jan 1, 2024 to Dec 31, 2024

Violation history (9)

Imported violation history for Buffalo Gap
Rule	Status	Period
Stage 1 Disinfectants and Disinfection Byproducts RuleHealth-based	Unaddressed	Jul 7, 2025
Chlorine	Archived	Jul 1, 2025 to Sep 30, 2025
Stage 1 Disinfectants and Disinfection Byproducts RuleHealth-based	Resolved	May 21, 2024 to Jan 30, 2025
Revised Total Coliform Rule	Resolved	Dec 1, 2023 to Dec 31, 2023
Lead and Copper Rule	Resolved	Oct 1, 2023 to Aug 7, 2024
Revised Total Coliform Rule	Resolved	Oct 1, 2023 to Oct 31, 2023
Chlorine	Resolved	Apr 1, 2023 to Jun 30, 2023
Revised Total Coliform Rule	Resolved	Apr 1, 2023 to Apr 30, 2023
Chlorine	Resolved	Jan 1, 2023 to Mar 31, 2023

City summary

What the indexed records say

Buffalo Gap has 1 published ZIP profile across Oglala Lakota County. No qualifying nearby hardness observation is available for the city.

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.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs

Moderately hard0 ZIPs

Hard0 ZIPs

Very hard0 ZIPs

0 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: — miles
Profiles with evidence: 0/1

Confidence labels

High: 0Moderate: 0Low: 0

Observation window: unavailable to unavailable.

ZIP directory

Water reports in Buffalo Gap

Open a ZIP for site-level provenance and measurements.

ZIP code

57722

No estimate

—

Nearest site: — mi
Confidence: —

View full ZIP evidence →

Practical next steps

Move from index to evidence

1. Open your ZIP. Check distance, dates, confidence, and the associated utility.
2. Read the current CCR. Confirm source water, detections, limits, ranges, and notices.
3. Use a measured hardness result. Confirm health concerns or treatment sizing with the right method.

Continue comparing

Other South Dakota communities

Batesland

Oglala Lakota County

— No median

Armour

Douglas County

1330 PPM median

Avon

Bon Homme County

1115 PPM median

Blackhawk

Meade County

688 PPM median

Bon Homme Colony

Bon Homme County

1160 PPM median

Box Elder

Meade County

648 PPM median

Search all 234 South Dakota cities →

Questions people ask

About water in Buffalo Gap

Is the water hard?

Check the utility-reported result above when available. Nearby environmental samples cannot establish tap-water hardness. Ask your provider or test your tap.

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.