Out of 283 ZIP codes with data in South Dakota, these are the highest-ranked areas for lead (ppb). See also: National Worst ZIP Codes for Lead in Water | All South Dakota Rankings
| Statistic | Value |
|---|---|
| ZIP codes ranked | 283 |
| Highest value | 13.0 ppb |
| Median value | 2.0 ppb |
| State | South Dakota |
Top 100 Worst ZIP Codes
| Rank | ZIP Code | City | State | Lead (ppb) | Safety Score |
|---|---|---|---|---|---|
| 1 | 57002 | Aurora | SD | 13.0 ppb | 67/100 |
| 2 | 57026 | Elkton | SD | 13.0 ppb | 66/100 |
| 3 | 57071 | Volga | SD | 13.0 ppb | — |
| 4 | 57212 | Arlington | SD | 13.0 ppb | — |
| 5 | 57213 | Astoria | SD | 13.0 ppb | — |
| 6 | 57218 | Brandt | SD | 13.0 ppb | — |
| 7 | 57220 | Bruce | SD | 13.0 ppb | 67/100 |
| 8 | 57226 | Clear Lake | SD | 13.0 ppb | — |
| 9 | 57237 | Gary | SD | 13.0 ppb | — |
| 10 | 57259 | Revillo | SD | 13.0 ppb | — |
| 11 | 57265 | Strandburg | SD | 13.0 ppb | — |
| 12 | 57268 | Toronto | SD | 13.0 ppb | — |
| 13 | 57276 | White | SD | 13.0 ppb | 67/100 |
| 14 | 57006 | Brookings | SD | 8.0 ppb | — |
| 15 | 57007 | Brookings | SD | 8.0 ppb | — |
| 16 | 57350 | Huron | SD | 6.0 ppb | — |
| 17 | 57469 | Redfield | SD | 6.0 ppb | — |
| 18 | 57701 | Rapid City | SD | 6.0 ppb | 83/100 |
| 19 | 57702 | Rapid City | SD | 6.0 ppb | 83/100 |
| 20 | 57703 | Rapid City | SD | 6.0 ppb | 62/100 |
| 21 | 57262 | Sisseton | SD | 5.0 ppb | — |
| 22 | 57362 | Miller | SD | 5.0 ppb | — |
| 23 | 57373 | Saint Lawrence | SD | 5.0 ppb | — |
| 24 | 57038 | Jefferson | SD | 4.0 ppb | — |
| 25 | 57049 | North Sioux City | SD | 4.0 ppb | — |
| 26 | 57201 | Watertown | SD | 4.0 ppb | 65/100 |
| 27 | 57221 | Bryant | SD | 4.0 ppb | — |
| 28 | 57223 | Castlewood | SD | 4.0 ppb | — |
| 29 | 57234 | Estelline | SD | 4.0 ppb | — |
| 30 | 57235 | Florence | SD | 4.0 ppb | — |
| 31 | 57238 | Goodwin | SD | 4.0 ppb | — |
| 32 | 57241 | Hayti | SD | 4.0 ppb | — |
| 33 | 57242 | Hazel | SD | 4.0 ppb | — |
| 34 | 57243 | Henry | SD | 4.0 ppb | — |
| 35 | 57248 | Lake Norden | SD | 4.0 ppb | — |
| 36 | 57263 | South Shore | SD | 4.0 ppb | 65/100 |
| 37 | 57271 | Vienna | SD | 4.0 ppb | — |
| 38 | 57313 | Armour | SD | 4.0 ppb | — |
| 39 | 57325 | Chamberlain | SD | 4.0 ppb | — |
| 40 | 57328 | Corsica | SD | 4.0 ppb | — |
| 41 | 57329 | Dante | SD | 4.0 ppb | — |
| 42 | 57330 | Delmont | SD | 4.0 ppb | — |
| 43 | 57331 | Dimock | SD | 4.0 ppb | — |
| 44 | 57341 | Gann Valley | SD | 4.0 ppb | — |
| 45 | 57342 | Geddes | SD | 4.0 ppb | — |
| 46 | 57344 | Harrison | SD | 4.0 ppb | — |
| 47 | 57355 | Kimball | SD | 4.0 ppb | — |
| 48 | 57356 | Lake Andes | SD | 4.0 ppb | — |
| 49 | 57368 | Plankinton | SD | 4.0 ppb | — |
| 50 | 57369 | Platte | SD | 4.0 ppb | — |
| 51 | 57370 | Pukwana | SD | 4.0 ppb | — |
| 52 | 57375 | Stickney | SD | 4.0 ppb | — |
| 53 | 57380 | Wagner | SD | 4.0 ppb | — |
| 54 | 57383 | White Lake | SD | 4.0 ppb | — |
| 55 | 57622 | Cherry Creek | SD | 4.0 ppb | — |
| 56 | 57623 | Dupree | SD | 4.0 ppb | — |
| 57 | 57625 | Eagle Butte | SD | 4.0 ppb | — |
| 58 | 57626 | Faith | SD | 4.0 ppb | 82/100 |
| 59 | 57633 | Isabel | SD | 4.0 ppb | — |
| 60 | 57644 | Meadow | SD | 4.0 ppb | — |
| 61 | 57652 | Ridgeview | SD | 4.0 ppb | — |
| 62 | 57656 | Timber Lake | SD | 4.0 ppb | — |
| 63 | 57718 | Black Hawk | SD | 4.0 ppb | 83/100 |
| 64 | 57748 | Howes | SD | 4.0 ppb | 83/100 |
| 65 | 57013 | Canton | SD | 3.0 ppb | — |
| 66 | 57016 | Chester | SD | 3.0 ppb | — |
| 67 | 57048 | Montrose | SD | 3.0 ppb | — |
| 68 | 57050 | Nunda | SD | 3.0 ppb | — |
| 69 | 57054 | Ramona | SD | 3.0 ppb | — |
| 70 | 57055 | Renner | SD | 3.0 ppb | 67/100 |
| 71 | 57058 | Salem | SD | 3.0 ppb | — |
| 72 | 57075 | Wentworth | SD | 3.0 ppb | — |
| 73 | 57076 | Winfred | SD | 3.0 ppb | — |
| 74 | 57103 | Sioux Falls | SD | 3.0 ppb | — |
| 75 | 57104 | Sioux Falls | SD | 3.0 ppb | 67/100 |
| 76 | 57105 | Sioux Falls | SD | 3.0 ppb | 67/100 |
| 77 | 57106 | Sioux Falls | SD | 3.0 ppb | 66/100 |
| 78 | 57107 | Sioux Falls | SD | 3.0 ppb | 67/100 |
| 79 | 57108 | Sioux Falls | SD | 3.0 ppb | — |
| 80 | 57110 | Sioux Falls | SD | 3.0 ppb | 62/100 |
| 81 | 57197 | Sioux Falls | SD | 3.0 ppb | — |
| 82 | 57216 | Big Stone City | SD | 3.0 ppb | — |
| 83 | 57227 | Corona | SD | 3.0 ppb | — |
| 84 | 57246 | Labolt | SD | 3.0 ppb | — |
| 85 | 57251 | Marvin | SD | 3.0 ppb | — |
| 86 | 57252 | Milbank | SD | 3.0 ppb | — |
| 87 | 57256 | Ortley | SD | 3.0 ppb | — |
| 88 | 57264 | Stockholm | SD | 3.0 ppb | — |
| 89 | 57266 | Summit | SD | 3.0 ppb | — |
| 90 | 57269 | Twin Brooks | SD | 3.0 ppb | — |
| 91 | 57274 | Webster | SD | 3.0 ppb | — |
| 92 | 57279 | Wilmot | SD | 3.0 ppb | — |
| 93 | 57349 | Howard | SD | 3.0 ppb | — |
| 94 | 57401 | Aberdeen | SD | 3.0 ppb | 55/100 |
| 95 | 57580 | Winner | SD | 3.0 ppb | — |
| 96 | 57717 | Belle Fourche | SD | 3.0 ppb | — |
| 97 | 57719 | Box Elder | SD | 3.0 ppb | 78/100 |
| 98 | 57747 | Hot Springs | SD | 3.0 ppb | — |
Methodology
Lead rankings are based on the 90th percentile lead testing value (PB90) reported by water systems under the Lead and Copper Rule. When CCR data is unavailable, EPA SDWIS lead sampling data is used. The EPA action level for lead is 15 ppb (0.015 mg/L). There is no safe level of lead exposure.
Data sources: EPA Safe Drinking Water Information System (SDWIS), FEMA National Flood Insurance Program, EPA radon zone maps, EIA electricity rates, and Consumer Confidence Reports. Last updated: 2026-10-14.
Frequently Asked Questions
What is a dangerous lead level in water?
The EPA action level is 15 parts per billion (ppb). The American Academy of Pediatrics recommends no more than 1 ppb for school drinking water. There is no safe level of lead exposure for children.
How is lead measured in water?
Water systems collect samples from homes with known lead service lines or lead solder. The 90th percentile value (PB90) means 90% of samples tested below that level. If PB90 exceeds 15 ppb, the system must take corrective action.
Explore More Rankings
- ZIP Codes with Most EPA Violations in South Dakota
- Lowest Home Safety Scores in South Dakota
- Highest Home Safety Scores in South Dakota
- Historical NFIP Claim Counts in South Dakota
- ZIP Codes with Highest Energy Costs in South Dakota
- EPA Radon Zone 1 ZIP Codes in South Dakota
- ZIP Codes with PFAS Detections in South Dakota
- Least Reliable Water Systems in South Dakota
- Environmental Justice Concern Areas in South Dakota
- Worst ZIP Codes for Homebuyers in South Dakota
- ZIP Codes with Worst CO & Gas Risk in South Dakota
- Safest ZIP Codes for Gas & CO Risk in South Dakota
- ZIP Codes with Worst Wildfire Smoke Risk in South Dakota
- Safest ZIP Codes for Wildfire Smoke in South Dakota
- All Rankings