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WaterSafeCheck
Official EPA SDWIS Verified ReportWater Quality & Testing GuideStatus: Normal Operations

ZIP Code 57790 Water Quality & Testing Report

Wall, SD · Pennington County County · Updated for 2026

Quick EPA Verified Answer

Is Tap Water Safe to Drink in ZIP 57790 (Wall, SD)?

Yes, tap water in ZIP code 57790 (Wall, SD) is safe to drink under EPA Safe Drinking Water Act standards. Supplied by WR/LJ - CREIGHTON PROJECT, the area earns an EPA Safety Grade of B (83/100) with 0 health violations, 1.0 ppb lead, and very hard (243 mg/L / 14.2 GPG) water.

Safety Score
B

Water Safety Grade

Good — Minor issues on record

Health Violations

0

Total Violations

0

Lead Risk

High

Contaminants

0

About Tap Water in ZIP Code 57790

Tap water in ZIP code 57790 (Wall, SD) is distributed by WR/LJ - CREIGHTON PROJECT (EPA ID: SD4602156), serving approximately 1,170 residents. Based on EPA Safe Drinking Water Act compliance records, this system receives a water safety grade of B with a composite quality score of 83/100.

Water System

WR/LJ - CREIGHTON PROJECT

EPA ID: SD4602156

Water Source

Ground Water

Population Served

1,170 residents

County

Pennington County County, South Dakota

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Lead Levels in ZIP 57790

EPA action level: 15 ppb | Public health goal: 0 ppb

Lead Level: 1.0 ppb — Very Low

The 90th percentile lead level in 57790 is 1.0 ppb. This meets the EPA action level of 15 ppb. Health experts recommend a target of 0 ppb for optimal safety.

Lead exposure risk in 57790 is rated High. EPA models estimate a 59% exposure probability based on housing and infrastructure age.

Lead Level (90th percentile)
1.00 ppb (0.001 mg/L)
Lead Exposure Risk Rating
High
Lead Exposure Probability

EPA model estimate based on housing age and infrastructure

59%
Note: Lead levels above are the 90th percentile from EPA monitoring — meaning 90% of samples were at or below this level. Even "undetected" tap water lead doesn't account for lead leaching from home plumbing. If your home was built before 1986, individual tap testing is recommended.
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Water Hardness & Mineral Content

Grains per gallon (GPG) & Parts per million (PPM / mg/L)

Classification: Very Hard14.2 GPG · 243 mg/L

Water in ZIP 57790 is Very Hard (243 mg/L / 14.2 GPG). High concentrations of dissolved limestone minerals cause severe mineral buildup, stiff laundry, dry skin, and premature water heater wear.

Recommendation: A whole-home water softener system is strongly recommended to protect plumbing and home appliances.
Hardness (GPG)

Grains per gallon

14.2 GPG
Hardness (PPM / mg/L)

Parts per million CaCO3

243 mg/L
Appliance Scaling Risk
High / Severe

Official EPA SDWIS Database Entry

Utility: WR/LJ - CREIGHTON PROJECT · PWSID: SD4602156

Verify on EPA.gov
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Violation History

Past 5 years — EPA SDWIS data

WR/LJ - CREIGHTON PROJECT has recorded zero violations in the EPA compliance database over the past 5 years.

Total Violations (5 yr)
0
Health-Based Violations
0
Unresolved Violations
0
Boil Water Advisories
0
Compliance Risk
Low

Regulatory compliance risk for this utility is rated Low based on past reporting and enforcement records.

⚗️

Contaminants Detected

Contaminants with health-based violations on record

No health-based contaminant violations are on record for ZIP code 57790 under the Safe Drinking Water Act.

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Water Source & Environmental Factors

Ground Water

This system draws water from underground aquifers. Groundwater is naturally filtered through soil and rock, but can still contain naturally occurring minerals like arsenic, radium, or nitrates.

Water Source Type
Ground Water
EPA Radon Zone

Moderate potential

Zone 2
Energy Burden

% of household income spent on energy — indicator of older infrastructure

2.56%

EPA Radon Zone 2 — moderate radon potential. The EPA recommends testing your home regardless of zone designation.

Water Quality Testing in ZIP 57790

Tap Water & Well Testing Recommendations

Residents in ZIP code 57790 served by WR/LJ - CREIGHTON PROJECT can test tap water or private well systems to verify water purity. Testing detects hidden contaminants before they impact family health.

Tap Water Testing Steps

  • 1.Conduct a certified lead check if your home was constructed before 1986.
  • 2.Use certified lab testing kits rather than uncalibrated test strips for regulated compliance.
  • 3.Sample water from both your kitchen faucet and water heater to compare line purity.

Private Well Testing Steps

  • •Test for Coliform bacteria and Nitrates annually.
  • •Test for heavy metals, radon, and PFAS every 3 years.
  • •Send samples to a state-certified drinking water laboratory recognized by South Dakota Department of Agriculture and Natural Resources.
Certified Lab Testing: Always use an EPA-certified drinking water laboratory in SD for formal legal or real estate compliance testing.

🛡 What Should You Do? — ZIP 57790 Recommendations

  • ✓ Run cold water for 30 seconds each morning before use — especially if pipes are old
  • ✓ Request your annual Consumer Confidence Report from WR/LJ - CREIGHTON PROJECT
  • ✓ If your home was built before 1986, consider testing your own tap for lead
  • ✓ Use a pitcher filter (NSF/ANSI 42 certified) for improved taste

Recommended Taste & Safety Filter:

🚰

NSF/ANSI 53 Certified Pitcher Filter

Best for removing aesthetic chlorine, odors, and low-level heavy metals.

Filter Selection Guide →

Frequently Asked Questions — ZIP 57790 Water Quality

Is tap water safe to drink in ZIP code 57790?+
Yes — tap water in 57790 (Wall, SD) meets EPA standards with a water safety grade of B. No health-based violations are on record in the past 5 years.
How do I get my water tested in ZIP 57790 (Wall, SD)?+
To test water quality in ZIP 57790, you can order a certified drinking water test kit or send water samples to an EPA/NELAP certified laboratory in SD. Certified testing checks for lead, coliform bacteria, nitrates, hardness, and PFAS that standard test strips miss. Contact South Dakota Department of Agriculture and Natural Resources for a list of certified regional labs.
How hard is the tap water in 57790?+
Tap water in 57790 is classified as Very Hard with an estimated mineral hardness of 243 mg/L (14.2 GPG). A whole-home water softener system is strongly recommended to protect plumbing and home appliances.
Should I test private well water in 57790?+
Yes. Unlike municipal systems, private wells in 57790 are not regulated by the EPA or local utilities. Private well owners should test their water annually for coliform bacteria and nitrates, and every 3 to 5 years for heavy metals (lead, arsenic) and volatile organic compounds.
What is the lead level in 57790 tap water?+
The 90th percentile lead level in 57790 is 1.0 ppb. The EPA action level is 15 ppb. This is below the EPA action level.
Is there an active boil water notice in 57790?+
There are currently no active boil water advisories on record for 57790. Water treatment systems are operating within normal parameters.
Who provides tap water to 57790?+
Tap water in ZIP code 57790 is provided by WR/LJ - CREIGHTON PROJECT (EPA ID: SD4602156), serving approximately 1,170 residents.
What water filter should I use in 57790?+
Based on water metrics for 57790, we recommend Lead & Microplastic Filter. Look for certifications such as NSF/ANSI 53 (Lead Reduction), NSF/ANSI 42 (Particulate/Taste).

Data Sources & Methodology

Water quality data for ZIP code 57790 is compiled from the EPA Safe Drinking Water Information System (SDWIS), EPA ECHO enforcement database, UCMR5 unregulated contaminant monitoring, and Consumer Confidence Reports filed by WR/LJ - CREIGHTON PROJECT. Safety scores are composite metrics derived from violation history, lead levels, enforcement actions, and infrastructure risk indicators. Data reflects a 5-year monitoring window. Last dataset update: 2024. View EPA source data →