Lead In Drinking Water In South Dakota
What residents of South Dakota need to know about lead in drinking water — including how it enters water, which utilities have documented violations, and what steps to take.
Source: EPA SDWIS, South Dakota Department of Agriculture and Natural Resources (DANR), CDC · Last reviewed: 2025-01-01
Quick Answer
Is lead in drinking water a real concern in South Dakota?
Yes — Sioux Falls, Rapid City, Aberdeen, and Watertown have older city cores with pre-1986 housing where lead solder and older service connections may be present.
Is this mostly a public-water issue, a private-well issue, or both?
Primarily household plumbing and service connections in older South Dakota city neighborhoods; cold winters mean water sits in pipes longer, increasing contact time with lead materials.
What is the main reason residents should care?
South Dakota's older cities developed much of their housing stock before the 1986 federal lead ban. Cold winters mean water frequently sits in pipes overnight or through weekends, extending contact time with any lead-bearing plumbing materials and potentially elevating lead concentrations at the tap.
Key Facts
| Federal Lead Action Level | 15 µg/L — no safe level per CDC |
| Cold climate factor | Extended non-use in cold winters increases water-lead contact time in pipes |
| City risk | Older Sioux Falls, Rapid City, Aberdeen neighborhoods — pre-1940 housing |
| Federal MCLG | Zero |
| State oversight | South Dakota Department of Agriculture and Natural Resources (DANR) |
Why This Matters in South Dakota
Sioux Falls, South Dakota's largest city, has older neighborhoods in its downtown and near-downtown areas with pre-1940 housing. Rapid City, Aberdeen, and Watertown have similar older city cores. Like other northern Plains states, South Dakota's extreme cold winters mean water can sit in pipes for extended periods during cold nights and weekends without flow, increasing contact time with any lead-bearing plumbing materials. This cold-climate effect is a meaningful amplifier of lead risk in older South Dakota homes. DANR enforces the Lead and Copper Rule and requires utilities to complete service line inventories.
South Dakota Utilities With Lead Violation Records
The utilities listed below have at least one lead violation on record in EPA's SDWIS database. Violations may be open or resolved — see individual utility pages for current status and risk level.
How Lead Gets Into Drinking Water
Lead service lines
The pipe connecting a home to the water main may be made of lead, especially in pre-1986 construction. Water sitting in these lines can accumulate lead before it reaches the tap.
Lead solder
Lead solder at pipe joints was banned for potable water systems in 1986. Homes built before that date — including significant portions of older South Dakota cities — may still have lead solder throughout their plumbing.
Older brass fixtures
Faucets, valves, and fixtures with high lead content were common before the 2014 revision of 'lead-free' standards. Replacing older fixtures at kitchen and drinking taps can meaningfully reduce exposure.
Corrosive water chemistry
Soft, acidic, or low-alkalinity water dissolves lead from plumbing more readily. Utilities use orthophosphate and other corrosion control treatments, but household plumbing after the meter is not within their control.
Who Should Pay Closest Attention
Families with young children in older Sioux Falls and Rapid City neighborhoods should flush taps before drinking water after any extended non-use period and consider a certified filter for drinking and cooking water.
Families with children under six
Pregnant residents
Households in homes built before 1986
Renters who cannot inspect building plumbing
Residents on a confirmed lead service line
Households that had plumbing work done recently (disturbances dislodge protective scale)
How to Check Your Situation in South Dakota
- 1
Identify your water utility. Use the ZIP lookup below or browse the South Dakota utility directory on this site.
- 2
Read your utility's page on this site to see its current risk level and any open lead violations.
- 3
Contact your utility and ask for your address-level service line material status. Under the federal Lead and Copper Rule Revisions (LCRR), utilities must maintain and provide this information.
- 4
Review your utility's most recent Consumer Confidence Report (CCR) — mailed annually or available on the utility's website.
- 5
Consider testing your tap water at a South Dakota Department of Agriculture and Natural Resources (DANR)-certified lab. Your state health department or South Dakota Department of Agriculture and Natural Resources (DANR) maintains a list of certified labs.
- 6
If you have young children or are pregnant, install a certified NSF/ANSI 53 or 58 filter at the kitchen tap as a precautionary measure.
Treatment Options
Boiling does not remove lead. Use a certified filter for drinking and cooking water.
NSF/ANSI Standard 53 — Activated Carbon Block
Under-sink or pitcher filters certified to Standard 53 are independently verified to reduce lead. Replace filters on the manufacturer's schedule — an overdue filter may not perform as certified.
NSF/ANSI Standard 58 — Reverse Osmosis
RO systems certified to Standard 58 remove 95–99% of lead and a broad range of contaminants. Requires under-sink installation. More comprehensive than Standard 53 for households with multiple contaminant concerns.
Flushing — temporary mitigation only
EPA recommends flushing the cold tap for 30 seconds to 2 minutes if water has sat in pipes for 6+ hours. Not a substitute for certified filtration or service line replacement.
Frequently Asked Questions
Related Pages
Lead — National Overview
All U.S. utilities with lead records
South Dakota State Overview
All utilities and water quality data
Nitrate in Drinking Water
A separate but common concern
Reverse Osmosis Guide
Removes 95–99% of lead
Activated Carbon Filter Guide
NSF/ANSI 53 certified options
All Contaminants
Complete reference library
Data Sources & Provenance
All data on this page is sourced from official U.S. government or public datasets.