Systems with a yearly average above an EPA comparison level
0.0%0 of 56 active community water systems
All 56 systems met the sampling requirement for a yearly average. Of those systems, 0 had at least one yearly average above an EPA comparison level and 56 did not.
EPA-based study benchmark: a fixed, unrounded research cutoff used to reproduce EPA’s final UCMR 5 technical-assistance classification based on the April 2024 federal levels. It is not a current federal or state standard. The label does not determine compliance, household exposure, or health risk.
State rules: The labels on this page use fixed research cutoffs based on the April 2024 federal levels. South Dakota may use different current standards or guidance. These UCMR 5 results do not determine current federal or state compliance. Find the official South Dakota drinking-water program →
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A ZIP code finds possible public water systems for an area; it cannot identify the supplier for a specific home. Confirm the provider using a water bill or utility record.
Compound summary
System counts in South Dakota
Each count shows how many included water systems had a yearly average above the named EPA comparison level.
| EPA rounding cutoff | Systems above comparison level | Water systems included | Percent |
|---|---|---|---|
| PFOA: 4 ppt level; unrounded average ≥4.05 ppt after applying EPA rounding | 0 | 56 | 0.0% |
| PFOS: 4 ppt level; unrounded average ≥4.05 ppt after applying EPA rounding | 0 | 56 | 0.0% |
| PFHxS: 10 ppt level; unrounded average ≥15 ppt after applying EPA rounding | 0 | 56 | 0.0% |
| PFNA: 10 ppt level; unrounded average ≥15 ppt after applying EPA rounding | 0 | 56 | 0.0% |
| HFPO-DA: 10 ppt level; unrounded average ≥15 ppt after applying EPA rounding | 0 | 56 | 0.0% |
| Hazard Index: 1 level; unrounded index ≥1.5 and at least two detected components | 0 | 56 | 0.0% |
System directory
Community water systems with complete monitoring
“Complete monitoring” means at least one sampling location had every required sample needed to calculate a yearly average. It does not mean every location or home was tested. Each PWSID appears once, preventing double counting across ZIP associations.
| Public water system | PWSID | Population served | Primary source | Sampling locations | EPA comparison result |
|---|---|---|---|---|---|
| ABERDEEN | SD4600020 | 27,989 | Surface water | 1 | No available average above comparison levels |
| BELLE FOURCHE | SD4600037 | 5,617 | Ground water | 3 | No available average above comparison levels |
| BIG SIOUX COMMUNITY WATER SYSTEM | SD4600429 | 5,800 | Ground water | 3 | No available average above comparison levels |
| BLACK HAWK WATER USER DISTRICT | SD4600043 | 4,500 | Ground water | 3 | No available average above comparison levels |
| BON HOMME-YANKTON RWS | SD4600865 | 13,320 | Surface water | 1 | No available average above comparison levels |
| BOX ELDER | SD4600046 | 14,000 | Ground water | 3 | No available average above comparison levels |
| BRANDON | SD4600048 | 11,048 | Ground water | 1 | No available average above comparison levels |
| BROOKINGS MUNICIPAL UTILITIES | SD4600071 | 23,377 | Ground water | 2 | No available average above comparison levels |
| BROOKINGS-DEUEL RURAL WATER SYSTEM | SD4600430 | 6,200 | Ground water | 2 | No available average above comparison levels |
| BROWN-DAY-MARSHALL RWS | SD4600882 | 5,673 | Ground water | 1 | No available average above comparison levels |
| CLAY RURAL WATER SYSTEM | SD4600626 | 4,780 | Ground water | 1 | No available average above comparison levels |
| DELL RAPIDS | SD4600105 | 3,633 | Ground water purchased | 1 | No available average above comparison levels |
| EAGLE BUTTE | SD4600010 | 4,000 | Surface water purchased | 1 | No available average above comparison levels |
| ELLSWORTH AFB | SD4680004 | 9,100 | Surface water purchased | 1 | No available average above comparison levels |
| GRANT-ROBERTS RURAL WATER SYSTEM | SD4600864 | 5,050 | Ground water | 1 | No available average above comparison levels |
| HARRISBURG, SD | SD4600148 | 10,297 | Ground water purchased | 2 | No available average above comparison levels |
| HOT SPRINGS | SD4600163 | 3,395 | Ground water | 2 | No available average above comparison levels |
| HURON | SD4600169 | 14,263 | Surface water purchased | 1 | No available average above comparison levels |
| KINGBROOK I RURAL WATER SYSTEM | SD4600431 | 6,455 | Ground water purchased | 1 | No available average above comparison levels |
| KYLE WATER SYSTEM | 084690474 | 6,526 | Surface water purchased | 2 | No available average above comparison levels |
| LINCOLN COUNTY RURAL WATER SYSTEM | SD4600304 | 5,965 | Ground water purchased | 2 | No available average above comparison levels |
| MADISON | SD4600199 | 6,191 | Ground water | 2 | No available average above comparison levels |
| MID-DAKOTA RURAL WATER | SD4602175 | 11,833 | Surface water | 1 | No available average above comparison levels |
| MINNEHAHA COMMUNITY WATER CORP | SD4600432 | 13,435 | Ground water | 2 | No available average above comparison levels |
| MISSION WATER SYSTEM | 084690532 | 1,500 | Surface water purchased | 1 | No available average above comparison levels |
| MITCHELL | SD4600214 | 15,651 | Surface water purchased | 1 | No available average above comparison levels |
| MOBRIDGE | SD4600215 | 3,261 | Surface water | 1 | No available average above comparison levels |
| OGLALA RWS PIPELINE | 084690480 | 3,562 | Ground water | 1 | No available average above comparison levels |
| PHILIP | SD4600238 | 759 | Surface water purchased | 1 | No available average above comparison levels |
| PIERRE | SD4600242 | 14,091 | Surface water | 1 | No available average above comparison levels |
| PINE RIDGE WATER SYSTEM | 084690475 | 7,482 | Ground water | 3 | No available average above comparison levels |
| RANDALL COMMUNITY WATER DISTRICT | SD4600433 | 6,248 | Surface water | 2 | No available average above comparison levels |
| RAPID CITY | SD4600406 | 72,009 | Surface water | 8 | No available average above comparison levels |
| RAPID VALLEY SANITARY DISTRICT | SD4600274 | 11,408 | Surface water | 1 | No available average above comparison levels |
| RENDEZVOUS RANCH | SD4602210 | 195 | Ground water | 1 | No available average above comparison levels |
| ROSEBUD RURAL WATER SYSTEM | 084690528 | 5,500 | Ground water | 1 | No available average above comparison levels |
| SICANGU MNI WICONI RURAL WATER SYSTEM | 084690516 | 5,610 | Surface water purchased | 1 | No available average above comparison levels |
| SIOUX FALLS | SD4600294 | 216,462 | Surface water | 2 | No available average above comparison levels |
| SIOUX RURAL WATER SYSTEM | SD4600866 | 4,280 | Ground water | 2 | No available average above comparison levels |
| SOUTH LINCOLN RURAL WATER SYSTEM | SD4600870 | 5,250 | Ground water | 2 | No available average above comparison levels |
| SPEARFISH | SD4600311 | 13,803 | Ground water | 7 | No available average above comparison levels |
| ST. FRANCIS | 084690020 | 2,450 | Ground water | 1 | No available average above comparison levels |
| STANDING ROCK RURAL WATER SYSTEM | 084690510 | 6,839 | Surface water | 1 | No available average above comparison levels |
| STURGIS | SD4600321 | 7,020 | Ground water | 1 | No available average above comparison levels |
| SUN VALLEY DEVELOPMENT | SD4602270 | 650 | Ground water | 1 | No available average above comparison levels |
| TEA | SD4600409 | 7,381 | Ground water purchased | 1 | No available average above comparison levels |
| TM RURAL WATER DISTRICT | SD4600999 | 4,250 | Surface water purchased | 3 | No available average above comparison levels |
| TMT, INC. | SD4602154 | 250 | Surface water purchased | 1 | No available average above comparison levels |
| TRI-COUNTY RURAL WATER SYSTEM | SD4600112 | 2,190 | Surface water | 1 | No available average above comparison levels |
| TRIPP COUNTY WATER USER DISTRICT | SD4600520 | 4,860 | Ground water | 2 | No available average above comparison levels |
| VERMILLION | SD4600342 | 11,695 | Ground water | 1 | No available average above comparison levels |
| WALL | SD4600417 | 699 | Ground water | 4 | No available average above comparison levels |
| WATERTOWN MUNICIPAL UTILITIES | SD4600356 | 23,230 | Ground water | 1 | No available average above comparison levels |
| WEB WATER DEVELOPMENT ASSOCIATION | SD4601089 | 20,750 | Surface water | 1 | No available average above comparison levels |
| WR/LJ - MNI WICONI | SD4602223 | 4,720 | Surface water purchased | 1 | No available average above comparison levels |
| YANKTON | SD4600423 | 15,411 | Ground water | 1 | No available average above comparison levels |
How the count works
What is included
Each active community water system with enough required samples for a yearly average is counted once, even if it is linked with several ZIP codes. Private wells are excluded, and UCMR 5 did not comprehensively monitor every small system.