B
77

Good Water Quality

Faulkton, SD 57438

Faulk County · Population served: 21,580 · Data updated March 2026

Water Systems Serving This Area

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FAULKTON
Surface water · Pop. 693
PWSID: SD4600125
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WEB WATER DEVELOPMENT ASSOCIATION
Surface water · Pop. 20,750
PWSID: SD4601089
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BRENTWOOD COLONY
Groundwater · Pop. 137
PWSID: SD4602066

Contaminants Detected

ContaminantDetected LevelEPA MCLHealth GuidelineStatus
Lead
8.0
15 ppb 1 ppb Warning

Violation History (Last 5 Years)

3Total (5yr)
0Health-Based
3Major

Water Quality Summary

Understanding Your Water in Faulkton

Tap water quality in Faulkton, South Dakota (57438) receives an overall grade of B (Good) with a score of 77 out of 100, based on analysis of EPA compliance data, contaminant testing, and violation history. This is 7 points below the South Dakota state average of 84. The area is served by 3 water systems providing water to approximately 21,580 people, using surface water and groundwater sources. Testing has found elevated levels of Lead that warrant attention.

Your Score 77/100 B
vs State 7 pts below South Dakota avg (84)
vs National 2 pts above national avg (75)

What a Grade B Means

A score of 77/100 means the water in Faulkton, SD is generally good and meets EPA standards, with only minor areas of concern. There may be low levels of detectable contaminants or a small number of non-critical violations. Most residents can feel comfortable with their tap water quality, though basic filtration can provide an extra layer of protection.

Surface water: sourced from rivers, lakes, or reservoirs
Groundwater: drawn from underground aquifers via wells

Health Information

What These Contaminants Mean for You

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Lead in Your Water

Lead is a toxic metal that can leach from aging pipes and plumbing fixtures.

Health Effects

Even low levels of lead exposure can cause developmental delays in children, kidney damage, and cardiovascular effects in adults. The EPA action level is 15 ppb, but health experts recommend no safe level of lead in drinking water.

Common Sources

Lead enters water primarily through corrosion of lead service lines, lead solder, and brass fixtures — especially in homes built before 1986.

What You Can Do

If lead is detected above 1 ppb, consider using a certified lead-removal filter (NSF/ANSI 53) for drinking and cooking water. Run cold water for 30 seconds before use if water has been sitting in pipes.

Common Questions

Frequently Asked Questions

Based on EPA data, tap water in Faulkton, South Dakota receives a grade of B (Good) with a score of 77/100. This indicates the water meets federal standards and has relatively few concerns. However, individual homes may still have localized issues such as lead from old plumbing.

ZIP code 57438 is served by 3 water systems using surface water, groundwater sources, providing water to approximately 21,580 people. Multiple source types mean your water may come from a blend of surface and underground sources.

Lead was detected at 8.0 ppb in Faulkton, South Dakota. While this is below the EPA action level of 15 ppb, it exceeds the health guideline of 1 ppb recommended by health organizations. Consider a certified lead filter, especially if you have young children.

No PFAS ("forever chemicals") were detected in water systems serving Faulkton, South Dakota during the most recent EPA monitoring period (UCMR5). However, not all water systems have been tested for all PFAS compounds, and new contamination can occur over time.

Water systems serving Faulkton, South Dakota have received 3 violations in the last 5 years. Violations can range from paperwork issues (monitoring & reporting) to serious health-based violations where contaminant levels exceeded safe limits. Review the violation details above for specifics.

Based on detected contaminants (lead), residents in Faulkton, South Dakota should consider: NSF/ANSI 53 certified filter — specifically rated for lead reduction. Pitcher filters (like Brita Longlast or PUR) and under-sink systems both work. Always look for filters with NSF/ANSI certification for the specific contaminants you want to remove.

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