TapSafetyReport
B75/100

Mission Tap Water Quality: Is It Safe to Drink? (2026 Report)

Serving 1,500 residents · South Dakota

What's In Mission's Tap Water?

34
Contaminants Tested
0
Exceed EPA Limits
1
Above EPA Goals
1 contaminant above EPA health goals
ContaminantDetectedLimit (MCL)Status
Lead (90th percentile)
< 0.001 mg/L0.015 mg/LAbove Goal

EPA Violation History

9

Violations (last 5yr)

2

Unresolved

0

Health-Related

TIER 3Unresolved

Failed to complete routine monitoring

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: September 1, 2025 – September 30, 2025Rule: Surface Water Treatment RuleVerify on EPA.gov
TIER 3Unresolved

Monitoring Violation

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: September 1, 2025 – September 30, 2025Rule: Total Coliform RuleVerify on EPA.gov
TIER 3Resolved

Monitoring violation

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: March 11, 2024 – March 15, 2024Rule: Total Coliform RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved

Failed to issue ongoing public notification

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: January 1, 2023 – December 20, 2023Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved

Failed Level 2 Assessment under Revised Total Coliform Rule

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: September 1, 2022 – August 31, 2023Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved

Failed Level 2 Assessment under Revised Total Coliform Rule

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: September 1, 2022 – August 31, 2023Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved

Failed to issue ongoing public notification

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: July 1, 2022 – December 20, 2023Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved

Monitoring violation

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: October 11, 2021 – October 28, 2021Rule: Total Coliform RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved

Failed to issue ongoing public notification

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: October 1, 2021 – December 20, 2023Rule: Ground Water RuleEnforcement: Resolving — corrective action underway

Understanding violation severity

Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.

Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly

Water Utility Details

MISSION WATER SYSTEM
Population Served

1,500

Water Source

Purchased Surface Water

System ID

084690532

Frequently Asked Questions About Mission Water

Is Mission tap water safe to drink?

Mission, South Dakota tap water receives a grade of B (75/100), which is considered good. Out of 34 contaminants tested, none exceed EPA maximum contaminant levels (MCLs) and 1 exceed health guidelines (MCLGs). While the water meets federal standards, some residents may still choose to use a filter for additional peace of mind.

What contaminants are in Mission's water?

Of the 34 contaminants tested in Mission's water supply, the most notable include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.

Does Mission have any water quality violations?

Yes, Mission has 14 EPA violation(s) on record, with the most recent in 2025. Violation types include MR, MON, RPT. 2 of these are health-based violations, which are the most serious category.

Do I need a water filter in Mission?

Mission water meets EPA standards, so a filter is not strictly necessary. However, some residents prefer the added security of a water filter. EPA health goals (MCLGs) are stricter than legal limits and are set at levels with zero expected health risk. 1 contaminant(s) exceed these stricter goals.

Where does Mission's tap water come from?

Mission's drinking water is sourced from purchased surface water and supplied by MISSION WATER SYSTEM. The system serves approximately 1,500 people. Surface water sources include rivers, lakes, and reservoirs.

How often is Mission's water tested?

Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. Mission's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.

How does Mission's water compare to other cities in South Dakota?

Mission's water quality score of 75/100 earns a grade of B, which is considered good. This is an above-average score compared to many cities nationwide. Visit our South Dakota state page to see how all cities in the state compare.

What should I do if I'm concerned about Mission's water quality?

If you have concerns about Mission's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (MISSION WATER SYSTEM) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.

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