2026 Rankings

Worst ZIP Codes for Lead in Water in South Dakota — ...

Last updated: June 4, 2026

244 ZIP codes ranked by Lead (mg/L) #1: ZIP 57058 (Salem, SD) — 28.0 ppb

Out of 244 ZIP codes with data in South Dakota, these are the highest-ranked areas for lead (mg/l). See also: National Worst ZIP Codes for Lead in Water | All South Dakota Rankings

Statistic Value
ZIP codes ranked 244
Highest value 28.0 ppb
Median value 2.0 ppb
State South Dakota

Top 100 Worst ZIP Codes

Rank ZIP Code City State Lead (mg/L) Safety Score
1 57058 Salem SD 28.0 ppb 45/100
2 57528 Colome SD 15.0 ppb 49/100
3 57369 Platte SD 14.0 ppb 45/100
4 57268 Toronto SD 13.0 ppb 40/100
5 57263 South Shore SD 10.0 ppb 48/100
6 57544 Kennebec SD 10.0 ppb 53/100
7 57436 Doland SD 9.0 ppb 53/100
8 57481 Westport SD 9.0 ppb 55/100
9 57006 Brookings SD 8.0 ppb 49/100
10 57007 Brookings SD 8.0 ppb 52/100
11 57014 Centerville SD 8.0 ppb 56/100
12 57226 Clear Lake SD 8.0 ppb 56/100
13 57249 Lake Preston SD 7.0 ppb 60/100
14 57279 Wilmot SD 7.0 ppb 65/100
15 57744 Hermosa SD 7.0 ppb 69/100
16 57004 Beresford SD 6.0 ppb 62/100
17 57045 Menno SD 6.0 ppb 68/100
18 57072 Volin SD 6.0 ppb 63/100
19 57315 Avon SD 6.0 ppb 58/100
20 57321 Canova SD 6.0 ppb 62/100
21 57350 Huron SD 6.0 ppb 62/100
22 57353 Iroquois SD 6.0 ppb 63/100
23 57363 Mount Vernon SD 6.0 ppb 68/100
24 57382 Wessington Springs SD 6.0 ppb 62/100
25 57385 Woonsocket SD 6.0 ppb 66/100
26 57399 Huron SD 6.0 ppb 62/100
27 57469 Redfield SD 6.0 ppb 63/100
28 57701 Rapid City SD 6.0 ppb 76/100
29 57702 Rapid City SD 6.0 ppb 76/100
30 57703 Rapid City SD 6.0 ppb 76/100
31 57709 Rapid City SD 6.0 ppb 80/100
32 57237 Gary SD 5.0 ppb 65/100
33 57262 Sisseton SD 5.0 ppb 70/100
34 57328 Corsica SD 5.0 ppb 65/100
35 57442 Gettysburg SD 5.0 ppb 66/100
36 57656 Timber Lake SD 5.0 ppb 83/100
37 57026 Elkton SD 4.0 ppb 66/100
38 57034 Hudson SD 4.0 ppb 66/100
39 57049 North Sioux City SD 4.0 ppb 55/100
40 57313 Armour SD 4.0 ppb 70/100
41 57349 Howard SD 4.0 ppb 62/100
42 57355 Kimball SD 4.0 ppb 64/100
43 57356 Lake Andes SD 4.0 ppb 66/100
44 57437 Eureka SD 4.0 ppb 66/100
45 57468 Pierpont SD 4.0 ppb 66/100
46 57632 Herreid SD 4.0 ppb 65/100
47 57751 Keystone SD 4.0 ppb 83/100
48 57013 Canton SD 3.0 ppb 65/100
49 57017 Colman SD 3.0 ppb 66/100
50 57020 Crooks SD 3.0 ppb 66/100
51 57055 Renner SD 3.0 ppb 40/100
52 57101 Sioux Falls SD 3.0 ppb 66/100
53 57103 Sioux Falls SD 3.0 ppb 61/100
54 57104 Sioux Falls SD 3.0 ppb 56/100
55 57105 Sioux Falls SD 3.0 ppb 56/100
56 57106 Sioux Falls SD 3.0 ppb 61/100
57 57107 Sioux Falls SD 3.0 ppb 61/100
58 57108 Sioux Falls SD 3.0 ppb 61/100
59 57109 Sioux Falls SD 3.0 ppb 61/100
60 57110 Sioux Falls SD 3.0 ppb 66/100
61 57117 Sioux Falls SD 3.0 ppb 61/100
62 57118 Sioux Falls SD 3.0 ppb 61/100
63 57186 Sioux Falls SD 3.0 ppb 61/100
64 57189 Sioux Falls SD 3.0 ppb 61/100
65 57192 Sioux Falls SD 3.0 ppb 61/100
66 57193 Sioux Falls SD 3.0 ppb 61/100
67 57194 Sioux Falls SD 3.0 ppb 61/100
68 57195 Sioux Falls SD 3.0 ppb 61/100
69 57196 Sioux Falls SD 3.0 ppb 61/100
70 57197 Sioux Falls SD 3.0 ppb 61/100
71 57198 Sioux Falls SD 3.0 ppb 61/100
72 57234 Estelline SD 3.0 ppb 59/100
73 57236 Garden City SD 3.0 ppb 64/100
74 57273 Waubay SD 3.0 ppb 55/100
75 57274 Webster SD 3.0 ppb 65/100
76 57317 Bonesteel SD 3.0 ppb 83/100
77 57332 Emery SD 3.0 ppb 66/100
78 57366 Parkston SD 3.0 ppb 69/100
79 57374 Spencer SD 3.0 ppb 70/100
80 57384 Wolsey SD 3.0 ppb 66/100
81 57445 Groton SD 3.0 ppb 63/100
82 57448 Hosmer SD 3.0 ppb 61/100
83 57452 Java SD 3.0 ppb 64/100
84 57533 Gregory SD 3.0 ppb 83/100
85 57623 Dupree SD 3.0 ppb 81/100
86 57717 Belle Fourche SD 3.0 ppb 75/100
87 57735 Edgemont SD 3.0 ppb 76/100
88 57738 Fairburn SD 3.0 ppb 82/100
89 57747 Hot Springs SD 3.0 ppb 83/100
90 57762 Nisland SD 3.0 ppb 73/100
91 57783 Spearfish SD 3.0 ppb 74/100
92 57799 Spearfish SD 3.0 ppb 78/100
93 57002 Aurora SD 2.0 ppb 70/100
94 57012 Canistota SD 2.0 ppb 66/100
95 57025 Elk Point SD 2.0 ppb 65/100
96 57042 Madison SD 2.0 ppb 55/100
97 57048 Montrose SD 2.0 ppb 63/100
98 57066 Tyndall SD 2.0 ppb 66/100
99 57068 Valley Springs SD 2.0 ppb 70/100
100 57070 Viborg SD 2.0 ppb 69/100

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: 2026-06-04.

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.

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How this ranking is calculated, data sources, and limitations: Rankings Methodology →


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Disclaimer: Rankings are based on EPA, FEMA, and federal agency data. They reflect historical patterns and risk indicators, not necessarily current conditions. For the most current information, contact your local water utility or request a Consumer Confidence Report.

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