Official EPA SDWIS Verified ReportWater Quality & Testing GuideHistorical Record: No Recorded SDWIS Violations

ZIP Code 57369 Water Quality & Testing Report

Platte, SD · Charles Mix County County · Updated for 2026

Compiled & verified by Sahajul Haque from official EPA SDWIS records

Public Health & Medical Notice: Drinking water quality data on this page reflects historical compliance records submitted under the Safe Drinking Water Act. This information does not constitute medical advice or a real-time safety guarantee. If you are pregnant, nursing, preparing infant formula, or immunocompromised, consult a healthcare provider. Boiling water kills biological pathogens, but does NOT remove chemical contaminants like lead, arsenic, or PFAS.

Quick EPA Verified Answer

Is Tap Water Safe to Drink in ZIP 57369 (Platte, SD)?

Caution / Filtration Recommended: Tap water in ZIP code 57369 (Platte, SD) has compliance concerns, earning an EPA Safety Grade of D (45/100) due to 0 health violation(s) and 14.0 ppb lead. While treated by RANDALL COMMUNITY WATER DISTRICT, residents are advised to use an NSF/ANSI 53 certified water filter for drinking and cooking.

Safety Score

Water Safety Grade

Poor — Multiple violations recorded

Health Violations

Total Violations

Lead Risk

Very High

Contaminants

About Tap Water in ZIP Code 57369

Tap water in ZIP code 57369 (Platte, SD) is distributed by RANDALL COMMUNITY WATER DISTRICT (EPA ID: SD4600433), serving approximately 6,248 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

RANDALL COMMUNITY WATER DISTRICT

EPA ID: SD4600433

Water Source

Surface Water

Population Served

6,248 residents

County

Charles Mix County County, South Dakota

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Lead Levels in ZIP 57369

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

Lead Level: 14.0 ppb — Moderate

The 90th percentile lead level in 57369 is 14.0 ppb. This is below the EPA action level of 15 ppb, but above ideal health goals. Consider a certified lead-reducing filter.

Lead exposure risk in 57369 is rated Very High. EPA models estimate a 77% exposure probability based on housing and infrastructure age.

Lead Level (90th percentile)

14.00 ppb (0.014 mg/L)

Lead Exposure Risk Rating

Very High

Lead Exposure Probability

EPA model estimate based on housing age and infrastructure

77%

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 Hard11.2 GPG · 192 mg/L

Water in ZIP 57369 is Very Hard (192 mg/L / 11.2 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

11.2 GPG

Hardness (PPM / mg/L)

Parts per million CaCO3

192 mg/L

Appliance Scaling Risk

High / Severe

Interactive Water Safety & Filter Matcher

Personalized for ZIP 57369 (Platte, SD)

Free Tool

1. When was your home or apartment building built?

2. What is your primary drinking water priority?

Official EPA SDWIS Database Entry

Utility: RANDALL COMMUNITY WATER DISTRICT · PWSID: SD4600433

Verify on EPA.gov

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Violation History

Past 5 years — EPA SDWIS data

RANDALL COMMUNITY WATER DISTRICT has recorded 1 violation, but none are health-based (e.g., administrative or monitoring infractions). 1 violation remains unresolved in EPA tracking records.

Total Violations (5 yr)

Health-Based Violations

Unresolved Violations

Boil Water Advisories

Compliance Risk

Moderate

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

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Contaminants Detected

Contaminants with health-based violations on record

No health-based contaminant violations are on record for ZIP code 57369 under the Safe Drinking Water Act.

⚖ Enforcement Actions

EPA or state regulators have issued 2 enforcement actions to address compliance lapses.

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Water Source & Environmental Factors

Surface Water

This system draws water from lakes, rivers, or reservoirs. Surface water is treated to remove sediment, microorganisms, and chemical contaminants before reaching taps.

Water Source Type

Surface Water

EPA Radon Zone

Highest potential

Zone 1

Annual Flood Risk Cost

Estimated annual flood-related costs per property

Energy Burden

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

2.46%

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 57369

Tap Water & Well Testing Recommendations

Residents in ZIP code 57369 served by RANDALL COMMUNITY WATER DISTRICT 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 57369 Recommendations

Serious water quality concerns — action recommended

Your water system has significant compliance issues. We strongly recommend protective measures.

🚨 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 RANDALL COMMUNITY WATER DISTRICT 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:

REQUIRED FOR SAFETY

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NSF 53 Lead Pitcher Filter

Certified to remove lead. Recommended for immediate protection.

Lead Filter Guide →

STRONGLY RECOMMENDED

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NSF 58 Under-Sink RO System

Reverse Osmosis system certified to remove PFAS, heavy metals, and viruses.

RO System Guide →

Frequently Asked Questions — ZIP 57369 Water Quality

Is tap water safe to drink in ZIP code 57369?+

Tap water in 57369 has a below-average safety grade of D due to compliance issues. We recommend using a certified water filter for drinking and cooking.

How do I get my water tested in ZIP 57369 (Platte, SD)?+

To test water quality in ZIP 57369, 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 57369?+

Tap water in 57369 is classified as Very Hard with an estimated mineral hardness of 192 mg/L (11.2 GPG). A whole-home water softener system is strongly recommended to protect plumbing and home appliances.

Should I test private well water in 57369?+

Yes. Unlike municipal systems, private wells in 57369 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 57369 tap water?+

The 90th percentile lead level in 57369 is 14.0 ppb. The EPA action level is 15 ppb. This is below the EPA action level.

Is there an active boil water notice in 57369?+

There are currently no active boil water advisories on record for 57369. Water treatment systems are operating within normal parameters.

Who provides tap water to 57369?+

Tap water in ZIP code 57369 is provided by RANDALL COMMUNITY WATER DISTRICT (EPA ID: SD4600433), serving approximately 6,248 residents.

What water filter should I use in 57369?+

Based on water metrics for 57369, 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 57369 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 RANDALL COMMUNITY WATER DISTRICT. 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 →