ZIP Code 57058 Water Quality & Testing Report
Salem, SD · McCook County County · Updated for 2026
Is Tap Water Safe to Drink in ZIP 57058 (Salem, SD)?
Caution / Filtration Recommended: Tap water in ZIP code 57058 (Salem, SD) has compliance concerns, earning an EPA Safety Grade of D (45/100) due to 0 health violation(s) and 28.0 ppb lead. While treated by Kingbrook I Rural Water System, residents are advised to use an NSF/ANSI 53 certified water filter for drinking and cooking.
Water Safety Grade
Poor — Multiple violations recorded
Health Violations
0
Total Violations
0
Lead Risk
Very High
Contaminants
0
About Tap Water in ZIP Code 57058
Tap water in ZIP code 57058 (Salem, SD) is distributed by Kingbrook I Rural Water System (EPA ID: SD4600431), serving approximately 6,455 residents. Based on EPA Safe Drinking Water Act compliance records, this system receives a water safety grade of D with a composite quality score of 45/100.
Water System
Kingbrook I Rural Water System
EPA ID: SD4600431
Water Source
Ground Water
Population Served
6,455 residents
County
McCook County County, South Dakota
Lead Levels in ZIP 57058
EPA action level: 15 ppb | Public health goal: 0 ppb
Lead Level: 28.0 ppb — EXCEEDS EPA Action Level
Lead exposure risk in 57058 is rated Very High. EPA models estimate a 82% exposure probability based on housing and infrastructure age.
EPA model estimate based on housing age and infrastructure
Water Hardness & Mineral Content
Grains per gallon (GPG) & Parts per million (PPM / mg/L)
Water in ZIP 57058 is Very Hard (246 mg/L / 14.4 GPG). High concentrations of dissolved limestone minerals cause severe mineral buildup, stiff laundry, dry skin, and premature water heater wear.
Grains per gallon
Parts per million CaCO3
Official EPA SDWIS Database Entry
Utility: Kingbrook I Rural Water System · PWSID: SD4600431
Violation History
Past 5 years — EPA SDWIS data
Kingbrook I Rural Water System has recorded zero violations in the EPA compliance database over the past 5 years.
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 57058 under the Safe Drinking Water Act.
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.
Highest potential
Estimated annual flood-related costs per property
% of household income spent on energy — indicator of older infrastructure
EPA Radon Zone 1 — highest potential for radon in indoor air. Homeowners should test their home for radon and consider mitigation if levels exceed 4 pCi/L.
Water Quality Testing in ZIP 57058
Tap Water & Well Testing Recommendations
Residents in ZIP code 57058 served by Kingbrook I Rural Water System 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.
🛡 What Should You Do? — ZIP 57058 Recommendations
Serious water quality concerns — action recommended
- 🚨 Install a certified NSF/ANSI 53 or 58 (reverse osmosis) filter immediately for drinking and cooking
- 🚨 Do not give unfiltered water to children, pregnant women, or immunocompromised individuals
- 🚨 Contact Kingbrook I Rural Water System to request the current violation status and corrective action plan
- 🚨 Report concerns to your state environmental agency or call the EPA hotline: 1-800-426-4791
- 🚨 Consider having your home's tap water independently tested by a certified lab
Recommended Water Treatment Systems:
NSF 53 Lead Pitcher Filter
Certified to remove lead. Recommended for immediate protection.
NSF 58 Under-Sink RO System
Reverse Osmosis system certified to remove PFAS, heavy metals, and viruses.
Frequently Asked Questions — ZIP 57058 Water Quality
Is tap water safe to drink in ZIP code 57058?+
How do I get my water tested in ZIP 57058 (Salem, SD)?+
How hard is the tap water in 57058?+
Should I test private well water in 57058?+
What is the lead level in 57058 tap water?+
Is there an active boil water notice in 57058?+
Who provides tap water to 57058?+
What water filter should I use in 57058?+
Data Sources & Methodology
Water quality data for ZIP code 57058 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 Kingbrook I Rural Water System. 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 →