Web Water Development Association
EPA ID: SD4601089 · 20,750 people served · 52 ZIP codes
Not yet resolved: 3 EPA violations at Web Water Development Association, affecting about 20,750 residents.
Data: EPA SDWIS Last verified: 2026-04-02
Compliance Trajectory
Stable · Risk tier: High · 95% chance of violation in next 12 months
Violations went from 3 (2022) to 4 (2025). Violation counts have remained relatively steady.
Service Area Map
Coverage area for Web Water Development Association Source: EPA SDWIS service area boundaries.
Service area boundary — Grade C
Service Area Demographics
The Web Water Development Association serves a community with a median household income of $68,750 and an estimated 68,299 residents across its service area. Approximately 74% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
🌊 Where Does Your Water Come From?
Web Water Development Association's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.
About 0% of homes in Day County, South Dakota rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Infrastructure Risk
Detected Contaminants
How Web Water Development Association compares to EPA limits
What This Means For You
Consumer Confidence Report Rule at 5 mg/L exceeds the EPA maximum of mg/L.
Revised Total Coliform Rule at 3 presence exceeds the EPA maximum of presence.
Stage 1 DBP Rule at 1 mg/L exceeds the EPA maximum of mg/L.
Lead and Copper Rule at 1 mg/L exceeds the EPA maximum of mg/L.
Contaminant 0700 at 1 mg/L exceeds the EPA maximum of mg/L.
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 2 detections recorded.
Comparable Water Systems
Similar-sized systems in South Dakota
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
Web Water Development Association (EPA ID: SD4601089) is a community water system in South Dakota that serves approximately 20,750 people from surface water sources.
This system provides water to 52 ZIP codes across 51 communities.
Average Home Safety Score: C (60/100)
Based on water quality violations, lead levels, and radon risk across all ZIP codes served by this system.
Violation History
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| August 1, 2025 | Consumer Confidence Report Rule | Monitoring | Unresolved |
| May 1, 2025 | Consumer Confidence Report Rule | Monitoring | Resolved |
| February 1, 2025 | Consumer Confidence Report Rule | Monitoring | Resolved |
| October 1, 2024 | Consumer Confidence Report Rule | Monitoring | Resolved |
| October 1, 2024 | Stage 1 DBP Rule | Monitoring | Resolved |
| May 21, 2024 | Chlorine residual | Health-based | Resolved |
| March 9, 2024 | Lead and Copper Rule | Monitoring | Resolved |
| February 28, 2024 | Chlorine residual | Health-based | Resolved |
| January 1, 2024 | Revised Total Coliform Rule | Monitoring | Unresolved |
| December 1, 2023 | Consumer Confidence Report Rule | Monitoring | Resolved |
| November 29, 2023 | Chlorine residual | Health-based | Resolved |
| October 1, 2023 | Stage 1 DBP Rule | Monitoring | Resolved |
| October 1, 2023 | Revised Total Coliform Rule | Monitoring | Resolved |
| July 1, 2023 | Revised Total Coliform Rule | Monitoring | Unresolved |
| June 1, 2023 | Consumer Confidence Report Rule | Monitoring | Resolved |
| May 4, 2023 | Contaminant 0700 | Health-based | Unresolved |
| April 1, 2023 | Revised Total Coliform Rule | Monitoring | Unresolved |
| February 1, 2023 | Consumer Confidence Report Rule | Monitoring | Resolved |
| January 1, 2023 | Revised Total Coliform Rule | Monitoring | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Consumer Confidence Report Rule | Reporting Failure | 5 | No |
| Revised Total Coliform Rule | Microbiological | 3 | No |
| Combined Radium | Radionuclides | 1 | No |
| Stage 1 DBP Rule | Treatment Failure | 1 | No |
| Lead and Copper Rule | Treatment Failure | 1 | No |
| Chlorine residual | Disinfectant | 1 | Yes |
| Contaminant 0700 | Other Violation | 1 | Yes |
Health Risk Details
Chlorine (Residual Disinfectant) (EPA limit: 4 mg/L (MRDL — Maximum Residual Disinfectant Level))
Irritation & DBP formation at high levels; protective at normal treatment levels At-risk groups: people with asthma or chemical sensitivities, kidney dialysis patients (water must be dechlorinated).
Removal methods: granular activated carbon (GAC), KDF media filter, carbon block filter. Find the right filter →
Lead & Copper
EPA Lead and Copper Rule sampling data for ZIP codes served by this system:
| ZIP Code | Lead Level | Exceeds Limit | Sample Date |
|---|---|---|---|
| 57436 | 0.009 mg/L | No | N/A |
| 57481 | 0.009 mg/L | No | N/A |
| 57442 | 0.005 mg/L | No | N/A |
| 57437 | 0.004 mg/L | No | N/A |
| 57468 | 0.004 mg/L | No | N/A |
| 57632 | 0.004 mg/L | No | N/A |
| 57273 | 0.003 mg/L | No | N/A |
| 57445 | 0.003 mg/L | No | N/A |
| 57448 | 0.003 mg/L | No | N/A |
| 57452 | 0.003 mg/L | No | N/A |
| 57428 | 0.002 mg/L | No | N/A |
| 57435 | 0.002 mg/L | No | N/A |
| 57438 | 0.002 mg/L | No | N/A |
| 57440 | 0.002 mg/L | No | N/A |
| 57441 | 0.002 mg/L | No | N/A |
| 57446 | 0.002 mg/L | No | N/A |
| 57451 | 0.002 mg/L | No | N/A |
| 57454 | 0.002 mg/L | No | N/A |
| 57471 | 0.002 mg/L | No | N/A |
| 57475 | 0.002 mg/L | No | N/A |
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 1 (High Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
ZIP Codes Served
Coverage: 51 ZIP codes confirmed via EPA Community Water System Service Area Boundaries v3 plus 1 additional ZIP inferred from SDWIS registry data. The EPA-confirmed set is the most reliable; SDWIS-inferred entries may be narrower than the real deployment area.
This system serves 52 ZIP codes:
57219 · 57239 · 57256 · 57261 · 57273 57274 · 57348 · 57401 · 57402 · 57422 57424 · 57427 · 57428 · 57432 · 57433 57434 · 57435 · 57436 · 57437 · 57438 57440 · 57441 · 57442 · 57445 · 57446 57448 · 57449 · 57450 · 57451 · 57452 57454 · 57456 · 57460 · 57461 · 57465 57466 · 57468 · 57469 · 57471 · 57472 57473 · 57474 · 57475 · 57476 · 57477 57479 · 57481 · 57601 · 57631 · 57632 57646 · 57648
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Web Water Development Association (SD4601089) on EPA.gov.
Frequently Asked Questions
Is Web Water Development Association water safe to drink?
Web Water Development Association has recorded 1 health-based violation in the past 5 years. While the system is required to treat water to meet federal standards, you may want to consider additional precautions such as a certified water filter.
How many people does Web Water Development Association serve?
Web Water Development Association serves approximately 20,750 people across 52 ZIP codes in South Dakota.
Where does Web Water Development Association get its water?
The primary water source is surface water.
Federal UCMR5 PFAS Monitoring: Tested Clean
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). No PFAS compounds were detected.
Current MCL reflects the lowest state-enforceable limit (NYS 10 ppt for PFOA/PFOS, effective August 2020). The federal final MCL of 4 ppt for PFOA/PFOS (EPA April 2024 rule) is not enforceable until April 2029. Detections above 4 ppt but below 10 ppt are below current MCL but above the future federal limit.
Source: U.S. EPA UCMR5 (Unregulated Contaminant Monitoring Rule, 5th cycle) — per-system federal sampling, 2023–2025. EPA UCMR5 monitoring program →
Lead Service Line Inventory
Service line breakdown reported under the federal Lead and Copper Rule Improvements (LCRI) inventory requirement:
This system reports zero confirmed lead service lines in its inventory. Unknown-material counts may still warrant verification.
Federal LCRI rule (effective October 2024) requires every public water system to inventory its service lines and complete lead-line replacement within 10 years.
Source: EPA SDWIS Federal Service Line Inventory (Phase 2) · Submitted 2026
ZipCheckup is not affiliated with the utility or state agency. Inventory figures render verbatim from the public LCRI submission cited above; ZipCheckup does not perform inspections or replacements.
How Water Systems Appear in Rankings
Water systems are evaluated by violation history, contaminant detections, and service population. Larger systems with more service connections appear in more rankings.
Frequently Asked Questions
What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Web Water Development Association (EPA ID: SD4601089) — request the latest Consumer Confidence Report or ask about specific contaminants.