critical Risk

Top 100 Cities with Highest Lead Levels

Toxic heavy metal causing brain damage, especially in children. Below are US cities ranked by their measured Lead levels compared to EPA limits. Higher percentages indicate greater concern.

EPA Limit (MCL)

0.015 ppm

Health Goal (MCLG)

0 ppm

Cities Above 50% of Limit

Cities Exceeding Limit

National Statistics for Lead

Cities Tested

752

Average Level

1.980 ppm

Highest Level

53.000 ppm

in Elgin, IL

People Affected (>50% of limit)

12.4M

Health Effects of Lead

Children

Brain damage and reduced IQ
Learning disabilities and behavioral problems
Slowed growth and development
Hearing and speech problems
Anemia and organ damage

Adults

High blood pressure and hypertension
Kidney damage and failure
Reproductive problems
Cardiovascular disease
Memory and concentration problems

Vulnerable Populations: There is no safe level of lead exposure. Children under 6 and pregnant women are at highest risk.

Top 100 Cities by Lead Level

Ranked by percentage of the EPA limit, using one real EPA measurement per water system (latest Lead and Copper Rule period per system (2016–2026)). Click any city for its full report.

Figure shown is the system's most recent Lead and Copper Rule 90th-percentile tap result; the period column gives its monitoring window.

Rank	City	State	Level	Period	EPA Limit	% of Limit	Status	Population
#1	Elgin	Illinois	53.00 ppbLead 90th percentile	2025-07-01 → 2025-12-31	15.00 ppb	353.3%	Exceeds Limit	114,797
#2	Aurora	Illinois	24.00 ppbLead 90th percentile	2025-07-01 → 2025-12-31	15.00 ppb	160.0%	Exceeds Limit	183,000
#3	Bartlett	Illinois	22.60 ppbLead 90th percentile	2025-07-01 → 2025-12-31	15.00 ppb	150.7%	Exceeds Limit	41,500
#4	Ashland	Kentucky	14.00 ppbLead 90th percentile	2021-01-01 → 2023-12-31	15.00 ppb	93.3%	Elevated	44,402
#5	DeKalb	Illinois	13.00 ppbLead 90th percentile	2026-01-01 → 2026-06-30	15.00 ppb	86.7%	Elevated	40,290
#6	Calumet City	Illinois	12.40 ppbLead 90th percentile	2026-01-01 → 2026-06-30	15.00 ppb	82.7%	Elevated	37,000
#7	Omaha	Nebraska	12.30 ppbLead 90th percentile	2023-01-01 → 2025-12-31	15.00 ppb	82.0%	Elevated	660,000
#8	Modesto	California	12.00 ppbLead 90th percentile	2025-01-01 → 2027-12-31	15.00 ppb	80.0%	Elevated	218,771
#9	Syracuse	New York	12.00 ppbLead 90th percentile	2025-07-01 → 2025-12-31	15.00 ppb	80.0%	Elevated	192,000
#10	Fall River	Massachusetts	12.00 ppbLead 90th percentile	2025-01-01 → 2025-12-31	15.00 ppb	80.0%	Elevated	94,000
#11	Lombard	Illinois	11.20 ppbLead 90th percentile	2026-01-01 → 2026-06-30	15.00 ppb	74.7%	Elevated	44,476
#12	Des Plaines	Illinois	11.10 ppbLead 90th percentile	2026-01-01 → 2026-06-30	15.00 ppb	74.0%	Elevated	60,675
#13	Olathe	Kansas	11.00 ppbLead 90th percentile	2021-01-01 → 2023-12-31	15.00 ppb	73.3%	Elevated	143,014
#14	New York	New York	10.00 ppbLead 90th percentile	2024-01-01 → 2024-12-31	15.00 ppb	66.7%	Elevated	8,271,000
#15	Glenview	Illinois	9.80 ppbLead 90th percentile	2025-07-01 → 2025-12-31	15.00 ppb	65.3%	Elevated	47,856
#16	Malden	Massachusetts	9.74 ppbLead 90th percentile	2026-01-01 → 2026-06-30	15.00 ppb	64.9%	Elevated	66,263
#17	Peoria	Illinois	9.00 ppbLead 90th percentile	2026-01-01 → 2026-06-30	15.00 ppb	60.0%	Elevated	137,575
#18	Waukegan	Illinois	9.00 ppbLead 90th percentile	2025-07-01 → 2025-12-31	15.00 ppb	60.0%	Elevated	87,149
#19	Holyoke	Massachusetts	9.00 ppbLead 90th percentile	2021-01-01 → 2023-12-31	15.00 ppb	60.0%	Elevated	37,838
#20	Mishawaka	Indiana	8.90 ppbLead 90th percentile	2021-01-01 → 2023-12-31	15.00 ppb	59.3%	Elevated	49,675
#21	Arlington Heights	Illinois	8.83 ppbLead 90th percentile	2025-07-01 → 2025-12-31	15.00 ppb	58.9%	Elevated	73,320
#22	Quincy	Massachusetts	8.74 ppbLead 90th percentile	2025-01-01 → 2025-12-31	15.00 ppb	58.3%	Elevated	106,000
#23	Reading	Massachusetts	8.39 ppbLead 90th percentile	2021-01-01 → 2023-12-31	15.00 ppb	55.9%	Elevated	26,262
#24	Medford	Massachusetts	8.35 ppbLead 90th percentile	2026-01-01 → 2026-06-30	15.00 ppb	55.7%	Elevated	61,700
#25	Marion	Iowa	8.30 ppbLead 90th percentile	2022-01-01 → 2024-12-31	15.00 ppb	55.3%	Elevated	41,623
#26	Sitka	Alaska	8.30 ppbLead 90th percentile	2026-01-01 → 2026-12-31	15.00 ppb	55.3%	Elevated	9,448
#27	Romeoville	Illinois	8.22 ppbLead 90th percentile	2025-01-01 → 2025-12-31	15.00 ppb	54.8%	Elevated	50,458
#28	Grand Junction	Colorado	8.20 ppbLead 90th percentile	2023-01-01 → 2025-12-31	15.00 ppb	54.7%	Elevated	26,000
#29	Oak Lawn	Illinois	8.10 ppbLead 90th percentile	2026-01-01 → 2026-06-30	15.00 ppb	54.0%	Elevated	58,362
#30	Revere	Massachusetts	8.05 ppbLead 90th percentile	2025-01-01 → 2025-12-31	15.00 ppb	53.7%	Elevated	62,186
#31	Cambridge	Massachusetts	8.00 ppbLead 90th percentile	2021-01-01 → 2023-12-31	15.00 ppb	53.3%	Elevated	118,214
#32	Evanston	Illinois	8.00 ppbLead 90th percentile	2025-07-01 → 2025-12-31	15.00 ppb	53.3%	Elevated	74,486
#33	Skokie	Illinois	7.99 ppbLead 90th percentile	2026-01-01 → 2026-06-30	15.00 ppb	53.3%	Elevated	66,422
#34	Lauderhill	Florida	8.00 ppbLead 90th percentile	2025-01-01 → 2025-12-01	15.00 ppb	53.3%	Elevated	55,000
#35	Crystal Lake	Illinois	7.70 ppbLead 90th percentile	2025-07-01 → 2025-12-31	15.00 ppb	51.3%	Elevated	40,661
#36	Detroit	Michigan	7.50 ppbLead 90th percentile	2025-01-01 → 2025-12-31	15.00 ppb	50.0%	Elevated	633,218
#37	Kansas City	Kansas	7.50 ppbLead 90th percentile	2021-01-01 → 2023-12-31	15.00 ppb	50.0%	Elevated	152,960
#38	Palatine	Illinois	7.50 ppbLead 90th percentile	2026-01-01 → 2026-06-30	15.00 ppb	50.0%	Elevated	70,875
#39	Livermore	California	7.50 ppbLead 90th percentile	2022-01-01 → 2024-12-31	15.00 ppb	50.0%	Elevated	60,414
#40	Bangor	Maine	7.45 ppbLead 90th percentile	2023-01-01 → 2025-12-31	15.00 ppb	49.7%	Within Limit	27,298
#41	Rockford	Illinois	7.30 ppbLead 90th percentile	2026-01-01 → 2026-06-30	15.00 ppb	48.7%	Within Limit	147,051
#42	Elmhurst	Illinois	7.21 ppbLead 90th percentile	2025-07-01 → 2025-12-31	15.00 ppb	48.1%	Within Limit	45,000
#43	Yonkers	New York	7.14 ppbLead 90th percentile	2024-01-01 → 2026-12-31	15.00 ppb	47.6%	Within Limit	211,569
#44	Naperville	Illinois	7.10 ppbLead 90th percentile	2025-07-01 → 2025-12-31	15.00 ppb	47.3%	Within Limit	156,406
#45	Chicago	Illinois	7.00 ppbLead 90th percentile	2026-01-01 → 2026-06-30	15.00 ppb	46.7%	Within Limit	2,721,308
#46	Allentown	Pennsylvania	7.00 ppbLead 90th percentile	2025-06-01 → 2025-09-30	15.00 ppb	46.7%	Within Limit	118,000
#47	Miami Beach	Florida	7.00 ppbLead 90th percentile	2025-01-01 → 2025-12-01	15.00 ppb	46.7%	Within Limit	100,000
#48	Winter Haven	Florida	7.00 ppbLead 90th percentile	2023-01-01 → 2023-12-01	15.00 ppb	46.7%	Within Limit	87,537
#49	Grand Rapids	Michigan	6.98 ppbLead 90th percentile	2025-01-01 → 2025-12-31	15.00 ppb	46.5%	Within Limit	306,901
#50	Rochester	New York	6.80 ppbLead 90th percentile	2025-07-01 → 2025-12-31	15.00 ppb	45.3%	Within Limit	210,000
#51	Park Ridge	Illinois	6.79 ppbLead 90th percentile	2026-01-01 → 2026-06-30	15.00 ppb	45.3%	Within Limit	39,800
#52	Carrollton	Georgia	6.80 ppbLead 90th percentile	2021-01-01 → 2023-12-31	15.00 ppb	45.3%	Within Limit	25,200
#53	Joliet	Illinois	6.47 ppbLead 90th percentile	2026-01-01 → 2026-06-30	15.00 ppb	43.1%	Within Limit	160,000
#54	Annapolis	Maryland	6.30 ppbLead 90th percentile	2021-01-01 → 2023-12-31	15.00 ppb	42.0%	Within Limit	35,000
#55	Auburn	Maine	6.20 ppbLead 90th percentile	2021-01-01 → 2023-12-31	15.00 ppb	41.3%	Within Limit	17,245
#56	New Orleans	Louisiana	6.00 ppbLead 90th percentile	2023-01-01 → 2025-12-31	15.00 ppb	40.0%	Within Limit	334,903
#57	Elizabethtown	Kentucky	6.00 ppbLead 90th percentile	2022-01-01 → 2024-12-31	15.00 ppb	40.0%	Within Limit	76,326
#58	Fountain Valley	California	6.00 ppbLead 90th percentile	2022-01-01 → 2024-12-31	15.00 ppb	40.0%	Within Limit	56,747
#59	Granite City	Illinois	6.00 ppbLead 90th percentile	2025-07-01 → 2025-12-31	15.00 ppb	40.0%	Within Limit	33,572
#60	Daphne	Alabama	6.00 ppbLead 90th percentile	2021-01-01 → 2023-12-31	15.00 ppb	40.0%	Within Limit	33,372
#61	Boston	Massachusetts	5.80 ppbLead 90th percentile	2026-01-01 → 2026-06-30	15.00 ppb	38.7%	Within Limit	675,647
#62	Windsor	Colorado	5.80 ppbLead 90th percentile	2023-01-01 → 2025-12-31	15.00 ppb	38.7%	Within Limit	23,500
#63	Colorado Springs	Colorado	5.70 ppbLead 90th percentile	2023-01-01 → 2025-12-31	15.00 ppb	38.0%	Within Limit	464,111
#64	Everett	Massachusetts	5.67 ppbLead 90th percentile	2025-01-01 → 2025-12-31	15.00 ppb	37.8%	Within Limit	49,075
#65	Rock Island	Illinois	5.60 ppbLead 90th percentile	2025-07-01 → 2025-12-31	15.00 ppb	37.3%	Within Limit	39,018
#66	Valparaiso	Indiana	5.60 ppbLead 90th percentile	2021-01-01 → 2023-12-31	15.00 ppb	37.3%	Within Limit	36,000
#67	Normal	Illinois	5.50 ppbLead 90th percentile	2025-07-01 → 2025-12-31	15.00 ppb	36.7%	Within Limit	52,736
#68	Manhattan Beach	California	5.40 ppbLead 90th percentile	2023-01-01 → 2025-12-31	15.00 ppb	36.0%	Within Limit	32,697
#69	Milwaukee	Wisconsin	5.30 ppbLead 90th percentile	2023-06-01 → 2023-09-30	15.00 ppb	35.3%	Within Limit	626,000
#70	Indianapolis	Indiana	5.18 ppbLead 90th percentile	2023-01-01 → 2025-12-31	15.00 ppb	34.5%	Within Limit	880,345
#71	Bloomington	Indiana	5.10 ppbLead 90th percentile	2023-01-01 → 2025-12-31	15.00 ppb	34.0%	Within Limit	83,000
#72	Bloomington	Illinois	5.10 ppbLead 90th percentile	2025-07-01 → 2025-12-31	15.00 ppb	34.0%	Within Limit	77,610
#73	Oak Park	Illinois	5.08 ppbLead 90th percentile	2025-07-01 → 2025-12-31	15.00 ppb	33.9%	Within Limit	54,583
#74	Mesa	Arizona	5.01 ppbLead 90th percentile	2022-01-01 → 2024-12-31	15.00 ppb	33.4%	Within Limit	466,000
#75	Houston	Texas	5.00 ppbLead 90th percentile	2024-01-01 → 2024-06-30	15.00 ppb	33.3%	Within Limit	2,970,543
#76	Cicero	Illinois	5.00 ppbLead 90th percentile	2026-01-01 → 2026-06-30	15.00 ppb	33.3%	Within Limit	83,000
#77	Dubuque	Iowa	5.00 ppbLead 90th percentile	2021-01-01 → 2023-12-31	15.00 ppb	33.3%	Within Limit	59,667
#78	Pocatello	Idaho	5.00 ppbLead 90th percentile	2026-01-01 → 2026-06-30	15.00 ppb	33.3%	Within Limit	58,231
#79	Englewood	Colorado	5.00 ppbLead 90th percentile	2025-01-01 → 2025-06-30	15.00 ppb	33.3%	Within Limit	57,332
#80	Noblesville	Indiana	5.00 ppbLead 90th percentile	2021-01-01 → 2023-12-31	15.00 ppb	33.3%	Within Limit	45,575
#81	Georgetown	Kentucky	5.00 ppbLead 90th percentile	2022-01-01 → 2024-12-31	15.00 ppb	33.3%	Within Limit	44,608
#82	Fitchburg	Massachusetts	5.00 ppbLead 90th percentile	2024-01-01 → 2026-12-31	15.00 ppb	33.3%	Within Limit	41,946
#83	Needham	Massachusetts	5.00 ppbLead 90th percentile	2021-01-01 → 2023-12-31	15.00 ppb	33.3%	Within Limit	31,664
#84	Norwood	Massachusetts	5.00 ppbLead 90th percentile	2025-01-01 → 2025-12-31	15.00 ppb	33.3%	Within Limit	29,909
#85	Jeffersonville	Indiana	5.00 ppbLead 90th percentile	2021-01-01 → 2023-12-31	15.00 ppb	33.3%	Within Limit	15,750
#86	Fort Lauderdale	Florida	4.90 ppbLead 90th percentile	2023-01-01 → 2023-12-01	15.00 ppb	32.7%	Within Limit	185,163
#87	Portland	Oregon	4.89 ppbLead 90th percentile	2025-01-01 → 2025-12-31	15.00 ppb	32.6%	Within Limit	666,200
#88	Braintree	Massachusetts	4.80 ppbLead 90th percentile	2025-01-01 → 2025-12-31	15.00 ppb	32.0%	Within Limit	39,143
#89	Memphis	Tennessee	4.73 ppbLead 90th percentile	2023-01-01 → 2025-12-31	15.00 ppb	31.5%	Within Limit	659,500
#90	South Bend	Indiana	4.70 ppbLead 90th percentile	2023-01-01 → 2025-12-31	15.00 ppb	31.3%	Within Limit	115,000
#91	Westminster	California	4.70 ppbLead 90th percentile	2022-01-01 → 2024-12-31	15.00 ppb	31.3%	Within Limit	90,911
#92	Addison	Illinois	4.70 ppbLead 90th percentile	2025-07-01 → 2025-12-31	15.00 ppb	31.3%	Within Limit	38,017
#93	Port St. Lucie	Florida	4.60 ppbLead 90th percentile	2023-01-01 → 2023-12-01	15.00 ppb	30.7%	Within Limit	224,485
#94	Eugene	Oregon	4.50 ppbLead 90th percentile	2022-01-01 → 2024-12-31	15.00 ppb	30.0%	Within Limit	176,000
#95	Tempe	Arizona	4.40 ppbLead 90th percentile	2022-01-01 → 2024-12-31	15.00 ppb	29.3%	Within Limit	165,000
#96	Boynton Beach	Florida	4.40 ppbLead 90th percentile	2025-01-01 → 2025-12-01	15.00 ppb	29.3%	Within Limit	112,000
#97	San Mateo	California	4.40 ppbLead 90th percentile	2023-01-01 → 2025-12-31	15.00 ppb	29.3%	Within Limit	102,348
#98	Fountain	Colorado	4.40 ppbLead 90th percentile	2025-01-01 → 2025-12-31	15.00 ppb	29.3%	Within Limit	25,130
#99	Provo	Utah	4.30 ppbLead 90th percentile	2023-01-01 → 2025-12-31	15.00 ppb	28.7%	Within Limit	116,288
#100	Mount Prospect	Illinois	4.27 ppbLead 90th percentile	2025-07-01 → 2025-12-31	15.00 ppb	28.5%	Within Limit	41,000

Common Sources of Lead

Lead service lines connecting homes to water mains
Lead solder in copper pipes (pre-1986 homes)
Brass fixtures and faucets
Corroded plumbing in older buildings

How to Remove Lead from Drinking Water

Reverse Osmosis

95-99% effective

Most effective option for removing lead. Point-of-use under-sink systems.

NSF 53 Certified Filters

95%+ effective

Carbon block filters specifically certified for lead. Available as pitchers, faucet-mount, or under-sink.

Distillation

99%+ effective

Very effective but slow. Good for drinking water only.

View Filter Recommendations

Frequently Asked Questions About Lead

Is any level of lead safe?

No. EPA and health experts agree there is no safe level of lead, especially for children. The action level of 15 ppb triggers required treatment, not a safety threshold.

How does lead get into my water?

Lead typically enters water from your home plumbing, not the water source. Corrosion of lead pipes, solder, and fixtures dissolves lead into water, especially when water sits overnight.

Does boiling water remove lead?

No. Boiling actually concentrates lead by evaporating water. Only filtration can remove lead.

Browse Other Contaminants

Arsenic PFAS (Forever Chemicals)Nitrates Chromium-6 (Hexavalent Chromium)Fluoride Chlorine Copper Mercury View All Contaminants

Back to All Contaminant Rankings

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Top 100 Cities by Lead Level

Ranked by percentage of the EPA limit, using one real EPA measurement per water system (latest Lead and Copper Rule period per system (2016–2026)). Click any city for its full report.

Figure shown is the system's most recent Lead and Copper Rule 90th-percentile tap result; the period column gives its monitoring window.

Rank

City

State

Level

Period

EPA Limit

% of Limit

Status

Population

Elgin

Illinois

53.00 ppbLead 90th percentile

2025-07-01 → 2025-12-31

15.00 ppb

353.3%

Exceeds Limit

114,797

Aurora

Illinois

24.00 ppbLead 90th percentile

2025-07-01 → 2025-12-31

15.00 ppb

160.0%

Exceeds Limit

183,000

Bartlett

Illinois

22.60 ppbLead 90th percentile

2025-07-01 → 2025-12-31

15.00 ppb

150.7%

Exceeds Limit

41,500

Ashland

Kentucky

14.00 ppbLead 90th percentile

2021-01-01 → 2023-12-31

15.00 ppb

93.3%

Elevated

44,402

DeKalb

Illinois

13.00 ppbLead 90th percentile

2026-01-01 → 2026-06-30

15.00 ppb

86.7%

Elevated

40,290

Calumet City

Illinois

12.40 ppbLead 90th percentile

2026-01-01 → 2026-06-30

15.00 ppb

82.7%

Elevated

37,000

Omaha

Nebraska

12.30 ppbLead 90th percentile

2023-01-01 → 2025-12-31

15.00 ppb

82.0%

Elevated

660,000

Modesto

California

12.00 ppbLead 90th percentile

2025-01-01 → 2027-12-31

15.00 ppb

80.0%

Elevated

218,771

Syracuse

New York

12.00 ppbLead 90th percentile

2025-07-01 → 2025-12-31

15.00 ppb

80.0%

Elevated

192,000

#10

Fall River

Massachusetts

12.00 ppbLead 90th percentile

2025-01-01 → 2025-12-31

15.00 ppb

80.0%

Elevated

94,000

#11

Lombard

Illinois

11.20 ppbLead 90th percentile

2026-01-01 → 2026-06-30

15.00 ppb

74.7%

Elevated

44,476

#12

Des Plaines

Illinois

11.10 ppbLead 90th percentile

2026-01-01 → 2026-06-30

15.00 ppb

74.0%

Elevated

60,675

#13

Olathe

Kansas

11.00 ppbLead 90th percentile

2021-01-01 → 2023-12-31

15.00 ppb

73.3%

Elevated

143,014

#14

New York

10.00 ppbLead 90th percentile

2024-01-01 → 2024-12-31

15.00 ppb

66.7%

Elevated

8,271,000

#15

Glenview

Illinois

9.80 ppbLead 90th percentile

2025-07-01 → 2025-12-31

15.00 ppb

65.3%

Elevated

47,856

#16

Malden

Massachusetts

9.74 ppbLead 90th percentile

2026-01-01 → 2026-06-30

15.00 ppb

64.9%

Elevated

66,263

#17

Peoria

Illinois

9.00 ppbLead 90th percentile

2026-01-01 → 2026-06-30

15.00 ppb

60.0%

Elevated

137,575

#18

Waukegan

Illinois

9.00 ppbLead 90th percentile

2025-07-01 → 2025-12-31

15.00 ppb

60.0%

Elevated

87,149

#19

Holyoke

Massachusetts

9.00 ppbLead 90th percentile

2021-01-01 → 2023-12-31

15.00 ppb

60.0%

Elevated

37,838

#20

Mishawaka

Indiana

8.90 ppbLead 90th percentile

2021-01-01 → 2023-12-31

15.00 ppb

59.3%

Elevated

49,675

#21

Arlington Heights

Illinois

8.83 ppbLead 90th percentile

2025-07-01 → 2025-12-31

15.00 ppb

58.9%

Elevated

73,320

#22

Quincy

Massachusetts

8.74 ppbLead 90th percentile

2025-01-01 → 2025-12-31

15.00 ppb

58.3%

Elevated

106,000

#23

Reading

Massachusetts

8.39 ppbLead 90th percentile

2021-01-01 → 2023-12-31

15.00 ppb

55.9%

Elevated

26,262

#24

Medford

Massachusetts

8.35 ppbLead 90th percentile

2026-01-01 → 2026-06-30

15.00 ppb

55.7%

Elevated

61,700

#25

Marion

Iowa

8.30 ppbLead 90th percentile

2022-01-01 → 2024-12-31

15.00 ppb

55.3%

Elevated

41,623

#26

Sitka

Alaska

8.30 ppbLead 90th percentile

2026-01-01 → 2026-12-31

15.00 ppb

55.3%

Elevated

9,448

#27

Romeoville

Illinois

8.22 ppbLead 90th percentile

2025-01-01 → 2025-12-31

15.00 ppb

54.8%

Elevated

50,458

#28

Grand Junction

Colorado

8.20 ppbLead 90th percentile

2023-01-01 → 2025-12-31

15.00 ppb

54.7%

Elevated

26,000

#29

Oak Lawn

Illinois

8.10 ppbLead 90th percentile

2026-01-01 → 2026-06-30

15.00 ppb

54.0%

Elevated

58,362

#30

Revere

Massachusetts

8.05 ppbLead 90th percentile

2025-01-01 → 2025-12-31

15.00 ppb

53.7%

Elevated

62,186

#31

Cambridge

Massachusetts

8.00 ppbLead 90th percentile

2021-01-01 → 2023-12-31

15.00 ppb

53.3%

Elevated

118,214

#32

Evanston

Illinois

8.00 ppbLead 90th percentile

2025-07-01 → 2025-12-31

15.00 ppb

53.3%

Elevated

74,486

#33

Skokie

Illinois

7.99 ppbLead 90th percentile

2026-01-01 → 2026-06-30

15.00 ppb

53.3%

Elevated

66,422

#34

Lauderhill

Florida

8.00 ppbLead 90th percentile

2025-01-01 → 2025-12-01

15.00 ppb

53.3%

Elevated

55,000

#35

Crystal Lake

Illinois

7.70 ppbLead 90th percentile

2025-07-01 → 2025-12-31

15.00 ppb

51.3%

Elevated

40,661

#36

Detroit

Michigan

7.50 ppbLead 90th percentile

2025-01-01 → 2025-12-31

15.00 ppb

50.0%

Elevated

633,218

#37

Kansas City

Kansas

7.50 ppbLead 90th percentile

2021-01-01 → 2023-12-31

15.00 ppb

50.0%

Elevated

152,960

#38

Palatine

Illinois

7.50 ppbLead 90th percentile

2026-01-01 → 2026-06-30

15.00 ppb

50.0%

Elevated

70,875

#39

Livermore

California

7.50 ppbLead 90th percentile

2022-01-01 → 2024-12-31

15.00 ppb

50.0%

Elevated

60,414

#40

Bangor

Maine

7.45 ppbLead 90th percentile

2023-01-01 → 2025-12-31

15.00 ppb

49.7%

Within Limit

27,298

#41

Rockford

Illinois

7.30 ppbLead 90th percentile

2026-01-01 → 2026-06-30

15.00 ppb

48.7%

Within Limit

147,051

#42

Elmhurst

Illinois

7.21 ppbLead 90th percentile

2025-07-01 → 2025-12-31

15.00 ppb

48.1%

Within Limit

45,000

#43

Yonkers

New York

7.14 ppbLead 90th percentile

2024-01-01 → 2026-12-31

15.00 ppb

47.6%

Within Limit

211,569

#44

Naperville

Illinois

7.10 ppbLead 90th percentile

2025-07-01 → 2025-12-31

15.00 ppb

47.3%

Within Limit

156,406

#45

Chicago

Illinois

7.00 ppbLead 90th percentile

2026-01-01 → 2026-06-30

15.00 ppb

46.7%

Within Limit

2,721,308

#46

Allentown

Pennsylvania

7.00 ppbLead 90th percentile

2025-06-01 → 2025-09-30

15.00 ppb

46.7%

Within Limit

118,000

#47

Miami Beach

Florida

7.00 ppbLead 90th percentile

2025-01-01 → 2025-12-01

15.00 ppb

46.7%

Within Limit

100,000

#48

Winter Haven

Florida

7.00 ppbLead 90th percentile

2023-01-01 → 2023-12-01

15.00 ppb

46.7%

Within Limit

87,537

#49

Grand Rapids

Michigan

6.98 ppbLead 90th percentile

2025-01-01 → 2025-12-31

15.00 ppb

46.5%

Within Limit

306,901

#50

Rochester

New York

6.80 ppbLead 90th percentile

2025-07-01 → 2025-12-31

15.00 ppb

45.3%

Within Limit

210,000

#51

Park Ridge

Illinois

6.79 ppbLead 90th percentile

2026-01-01 → 2026-06-30

15.00 ppb

45.3%

Within Limit

39,800

#52

Carrollton

Georgia

6.80 ppbLead 90th percentile

2021-01-01 → 2023-12-31

15.00 ppb

45.3%

Within Limit

25,200

#53

Joliet

Illinois

6.47 ppbLead 90th percentile

2026-01-01 → 2026-06-30

15.00 ppb

43.1%

Within Limit

160,000

#54

Annapolis

Maryland

6.30 ppbLead 90th percentile

2021-01-01 → 2023-12-31

15.00 ppb

42.0%

Within Limit

35,000

#55

Auburn

Maine

6.20 ppbLead 90th percentile

2021-01-01 → 2023-12-31

15.00 ppb

41.3%

Within Limit

17,245

#56

New Orleans

Louisiana

6.00 ppbLead 90th percentile

2023-01-01 → 2025-12-31

15.00 ppb

40.0%

Within Limit

334,903

#57

Elizabethtown

Kentucky

6.00 ppbLead 90th percentile

2022-01-01 → 2024-12-31

15.00 ppb

40.0%

Within Limit

76,326

#58

Fountain Valley

California

6.00 ppbLead 90th percentile

2022-01-01 → 2024-12-31

15.00 ppb

40.0%

Within Limit

56,747

#59

Granite City

Illinois

6.00 ppbLead 90th percentile

2025-07-01 → 2025-12-31

15.00 ppb

40.0%

Within Limit

33,572

#60

Daphne

Alabama

6.00 ppbLead 90th percentile

2021-01-01 → 2023-12-31

15.00 ppb

40.0%

Within Limit

33,372

#61

Boston

Massachusetts

5.80 ppbLead 90th percentile

2026-01-01 → 2026-06-30

15.00 ppb

38.7%

Within Limit

675,647

#62

Windsor

Colorado

5.80 ppbLead 90th percentile

2023-01-01 → 2025-12-31

15.00 ppb

38.7%

Within Limit

23,500

#63

Colorado Springs

Colorado

5.70 ppbLead 90th percentile

2023-01-01 → 2025-12-31

15.00 ppb

38.0%

Within Limit

464,111

#64

Everett

Massachusetts

5.67 ppbLead 90th percentile

2025-01-01 → 2025-12-31

15.00 ppb

37.8%

Within Limit

49,075

#65

Rock Island

Illinois

5.60 ppbLead 90th percentile

2025-07-01 → 2025-12-31

15.00 ppb

37.3%

Within Limit

39,018

#66

Valparaiso

Indiana

5.60 ppbLead 90th percentile

2021-01-01 → 2023-12-31

15.00 ppb

37.3%

Within Limit

36,000

#67

Normal

Illinois

5.50 ppbLead 90th percentile

2025-07-01 → 2025-12-31

15.00 ppb

36.7%

Within Limit

52,736

#68

Manhattan Beach

California

5.40 ppbLead 90th percentile

2023-01-01 → 2025-12-31

15.00 ppb

36.0%

Within Limit

32,697

#69

Milwaukee

Wisconsin

5.30 ppbLead 90th percentile

2023-06-01 → 2023-09-30

15.00 ppb

35.3%

Within Limit

626,000

#70

Indianapolis

Indiana

5.18 ppbLead 90th percentile

2023-01-01 → 2025-12-31

15.00 ppb

34.5%

Within Limit

880,345

#71

Bloomington

Indiana

5.10 ppbLead 90th percentile

2023-01-01 → 2025-12-31

15.00 ppb

34.0%

Within Limit

83,000

#72

Bloomington

Illinois

5.10 ppbLead 90th percentile

2025-07-01 → 2025-12-31

15.00 ppb

34.0%

Within Limit

77,610

#73

Oak Park

Illinois

5.08 ppbLead 90th percentile

2025-07-01 → 2025-12-31

15.00 ppb

33.9%

Within Limit

54,583

#74

Mesa

Arizona

5.01 ppbLead 90th percentile

2022-01-01 → 2024-12-31

15.00 ppb

33.4%

Within Limit

466,000

#75

Houston

Texas

5.00 ppbLead 90th percentile

2024-01-01 → 2024-06-30

15.00 ppb

33.3%

Within Limit

2,970,543

#76

Cicero

Illinois

5.00 ppbLead 90th percentile

2026-01-01 → 2026-06-30

15.00 ppb

33.3%

Within Limit

83,000

#77

Dubuque

Iowa

5.00 ppbLead 90th percentile

2021-01-01 → 2023-12-31

15.00 ppb

33.3%

Within Limit

59,667

#78

Pocatello

Idaho

5.00 ppbLead 90th percentile

2026-01-01 → 2026-06-30

15.00 ppb

33.3%

Within Limit

58,231

#79

Englewood

Colorado

5.00 ppbLead 90th percentile

2025-01-01 → 2025-06-30

15.00 ppb

33.3%

Within Limit

57,332

#80

Noblesville

Indiana

5.00 ppbLead 90th percentile

2021-01-01 → 2023-12-31

15.00 ppb

33.3%

Within Limit

45,575

#81

Georgetown

Kentucky

5.00 ppbLead 90th percentile

2022-01-01 → 2024-12-31

15.00 ppb

33.3%

Within Limit

44,608

#82

Fitchburg

Massachusetts

5.00 ppbLead 90th percentile

2024-01-01 → 2026-12-31

15.00 ppb

33.3%

Within Limit

41,946

#83

Needham

Massachusetts

5.00 ppbLead 90th percentile

2021-01-01 → 2023-12-31

15.00 ppb

33.3%

Within Limit

31,664

#84

Norwood

Massachusetts

5.00 ppbLead 90th percentile

2025-01-01 → 2025-12-31

15.00 ppb

33.3%

Within Limit

29,909

#85

Jeffersonville

Indiana

5.00 ppbLead 90th percentile

2021-01-01 → 2023-12-31

15.00 ppb

33.3%

Within Limit

15,750

#86

Fort Lauderdale

Florida

4.90 ppbLead 90th percentile

2023-01-01 → 2023-12-01

15.00 ppb

32.7%

Within Limit

185,163

#87

Portland

Oregon

4.89 ppbLead 90th percentile

2025-01-01 → 2025-12-31

15.00 ppb

32.6%

Within Limit

666,200

#88

Braintree

Massachusetts

4.80 ppbLead 90th percentile

2025-01-01 → 2025-12-31

15.00 ppb

32.0%

Within Limit

39,143

#89

Memphis

Tennessee

4.73 ppbLead 90th percentile

2023-01-01 → 2025-12-31

15.00 ppb

31.5%

Within Limit

659,500

#90

South Bend

Indiana

4.70 ppbLead 90th percentile

2023-01-01 → 2025-12-31

15.00 ppb

31.3%

Within Limit

115,000

#91

Westminster

California

4.70 ppbLead 90th percentile

2022-01-01 → 2024-12-31

15.00 ppb

31.3%

Within Limit

90,911

#92

Addison

Illinois

4.70 ppbLead 90th percentile

2025-07-01 → 2025-12-31

15.00 ppb

31.3%

Within Limit

38,017

#93

Port St. Lucie

Florida

4.60 ppbLead 90th percentile

2023-01-01 → 2023-12-01

15.00 ppb

30.7%

Within Limit

224,485

#94

Eugene

Oregon

4.50 ppbLead 90th percentile

2022-01-01 → 2024-12-31

15.00 ppb

30.0%

Within Limit

176,000

#95

Tempe

Arizona

4.40 ppbLead 90th percentile

2022-01-01 → 2024-12-31

15.00 ppb

29.3%

Within Limit

165,000

#96

Boynton Beach

Florida

4.40 ppbLead 90th percentile

2025-01-01 → 2025-12-01

15.00 ppb

29.3%

Within Limit

112,000

#97

San Mateo

California

4.40 ppbLead 90th percentile

2023-01-01 → 2025-12-31

15.00 ppb

29.3%

Within Limit

102,348

#98

Fountain

Colorado

4.40 ppbLead 90th percentile

2025-01-01 → 2025-12-31

15.00 ppb

29.3%

Within Limit

25,130

#99

Provo

Utah

4.30 ppbLead 90th percentile

2023-01-01 → 2025-12-31

15.00 ppb

28.7%

Within Limit

116,288

#100

Mount Prospect

Illinois

4.27 ppbLead 90th percentile

2025-07-01 → 2025-12-31

15.00 ppb

28.5%

Within Limit

41,000