St. Lawrence
SD

Is St. Lawrence, SD Tap Water Safe to Drink?

St. Lawrence tap water meets federal Safe Drinking Water Act standards but 1 of 1 ZIP code show detections above EPA health guidelines, primarily for lithium. A certified filter is recommended for households that want an additional layer of protection.

1Water system
1ZIP codes
100%ZIPs above EPA guideline
Latest data2023-10-23

Where Does St. Lawrence Get Its Water?

Water in St. Lawrence, SD is provided by 1 public water system: MID-DAKOTA RURAL WATER.

How Is St. Lawrence Tap Water Treated?

Treated water is disinfected using free chlorine and chloramines. Treatment includes membrane filtration.

What's in St. Lawrence Tap Water?

The following contaminants were detected most frequently in St. Lawrence public water systems. 1 of 1 ZIP codes showed detections above EPA health guidelines.

ContaminantPeak detectedEPA guidelineZIPs detectedStatus
lithium 52 µg/L 10 µg/L 1 ZIP Above guideline
PFTrDA 0.007 µg/L — 0 ZIPs Within guideline
HFPO-DA 0.005 µg/L — 0 ZIPs Within guideline
11Cl-PF3OUdS 0.005 µg/L — 0 ZIPs Within guideline
PFBA 0.005 µg/L — 0 ZIPs Within guideline

Health Risk Profile for St. Lawrence

Based on EPA monitoring data, 1 of 1 ZIP codes in St. Lawrence have recorded detections above EPA health guidelines. Sensitive populations such as infants, pregnant individuals, and those with weakened immune systems may benefit from an additional layer of protection such as a certified point-of-use filter.

Best Filters for PFAS Water Profile

PFAS compounds are detected in this water supply. A reverse osmosis (RO) system or an activated-carbon filter specifically certified under NSF/ANSI P473 is required for reliable PFAS reduction. Standard pitcher and faucet filters without P473 certification do not remove PFAS.

Waterdrop G3P600 Reverse Osmosis System
Under-sink RO system

8-stage tankless RO system certified to NSF/ANSI 58, reduces 1,000+ contaminants including PFAS, lead, arsenic, fluoride, and nitrates.

Epic Pure XP Water Filter Pitcher
Pitcher filter

NSF-certified dual-layer filtration reduces 70+ contaminants including PFAS, lead, chlorine, microplastics, and bacteria.

See recommendations matched to your exact address: choose your ZIP code below.

Frequently Asked Questions about St. Lawrence Tap Water

Is St. Lawrence tap water safe to drink?

St. Lawrence tap water meets Safe Drinking Water Act requirements but 1 of 1 ZIP codes show contaminant levels above EPA health-based guidelines. A certified point-of-use filter adds an extra layer of protection.

What contaminants are in St. Lawrence tap water?

The most commonly detected contaminants in St. Lawrence water systems include: lithium, PFTrDA, HFPO-DA. See the ZIP-level reports for exact measurements and EPA guideline comparisons.

Where does St. Lawrence get its drinking water?

St. Lawrence receives water from one public water system, including MID-DAKOTA RURAL WATER.

Do I need a water filter in St. Lawrence?

If your ZIP code is among those with detections above EPA health guidelines, choose a filter certified for the specific contaminants shown in your ZIP report. Reverse osmosis is generally the broadest option for PFAS, lithium, and many other dissolved contaminants.

How often is St. Lawrence tap water tested?

Public water systems in St. Lawrence are required by the EPA to test for regulated contaminants on schedules ranging from daily (for microbials and disinfectants) to annual or triennial (for many chemical contaminants). Results are published in annual Consumer Confidence Reports (CCRs). The data on this page reflects the most recent available EPA monitoring results, with the latest sample date of 2023-10-23.

Tap water reports by ZIP in St. Lawrence

Water utilities serving St. Lawrence, SD

Service area boundaries are approximate and based on state filings or modeled estimates. Contact your utility to confirm exact service at a specific address.

Modeled boundaries are shown with a dashed outline. Outlines appear when service-area boundary data is available for this ZIP.

Also covers / overlaps with