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California Blood Lead Data, 2022

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Number of Individual Children Screened for Lead, by California Local Health Jurisdiction and Highest Level, 2022 (Table)

Blood Lead Maps and Data

Number of Individual Children Screened for Lead, by California Local Health Jurisdiction and Highest Level, 2022 (Table)​

Local Health JurisdictionAge Group (Years)Blood Lead Level (B​LL) <​ 3.5 nBLL < 3.5 % (row)BLL ≥ 3.5 nBLL ≥ 3.5% (row)Total Number of Children with a BLL
AlamedaAge < 614,150​

96.86%4583.14%14,608
​Age 6 to 212,67095.49%1264.51%2,796
​Local Total age < 2116,82096.64%5843.36%17,404
AlpineAge < 6SuppressedSuppressedSuppressedSuppressed1
​Age 6 to 21SuppressedSuppressedSuppressedSuppressed0
​Local Total age < 21SuppressedSuppressedSuppressedSuppressed1
AmadorAge < 6SuppressedSuppressedSuppressedSuppressed197
​Age 6 to 21SuppressedSuppressedSuppressedSuppressed13
​Local Total age < 21SuppressedSuppressedSuppressedSuppressed210
BerkeleyAge < 657695.52%274.48%603
​Age 6 to 216095.24%34.76%63
​Local Total age < 2163695.50%304.50%666
ButteAge < 61,43697.75%332.25%1,469
​Age 6 to 2110097.09%32.91%103
​Local Total age < 211,53697.71%362.29%1,572
CalaverasAge < 6SuppressedSuppressedSuppressedSuppressed228
​Age 6 to 21SuppressedSuppressedSuppressedSuppressed27
​Local Total age < 21SuppressedSuppressedSuppressedSuppressed255
ColusaAge < 6SuppressedSuppressedSuppressedSuppressed355
​Age 6 to 21SuppressedSuppressedSuppressedSuppressed20
​Local Total age < 21SuppressedSuppressedSuppressedSuppressed375
Contra CostaAge < 67,16797.74%1662.26%7,333
​Age 6 to 2182293.09%616.91%883
​Local Total age < 217,98997.24%2272.76%8,216
Del NorteAge < 6SuppressedSuppressedSuppressedSuppressed220
​Age 6 to 21SuppressedSuppressedSuppressedSuppressed9
​Local Total age < 21SuppressedSuppressedSuppressedSuppressed229
El DoradoAge < 660397.42%162.58%619
​Age 6 to 213997.50%12.50%40
​Local Total age < 2164297.42%172.58%659
FresnoAge < 610,15195.91%4334.09%10,584
​Age 6 to 2162898.28%111.72%639
​Local Total age < 2110,77996.04%4443.96%11,223
GlennAge < 6SuppressedSuppressedSuppressedSuppressed347
​Age 6 to 21SuppressedSuppressedSuppressedSuppressed14
​Local Total age < 21SuppressedSuppressedSuppressedSuppressed361
HumboldtAge < 61,54092.16%1317.84%1,671
​Age 6 to 214090.91%49.09%44
​Local Total age < 211,58092.13%1357.87%1,715
ImperialAge < 62,55298.99%261.01%2,578
​Age 6 to 2125898.10%51.90%263
​Local Total age < 212,81098.91%311.09%2,841
InyoAge < 6SuppressedSuppressedSuppressedSuppressed150
​Age 6 to 21SuppressedSuppressedSuppressedSuppressed8
​Local Total age < 21SuppressedSuppressedSuppressedSuppressed158
KernAge < 612,65297.89%2732.11%12,925
​Age 6 to 2195497.75%222.25%976
​Local Total age < 2113,60697.88%2952.12%13,901
KingsAge < 61,45297.71%342.29%1,486
​Age 6 to 213995.12%24.88%41
​Local Total age < 211,49197.64%362.36%1,527
LakeAge < 6SuppressedSuppressedSuppressedSuppressed472
​Age 6 to 21SuppressedSuppressedSuppressedSuppressed29
​Local Total age < 21SuppressedSuppressedSuppressedSuppressed501
LassenAge < 6SuppressedSuppressedSuppressedSuppressed231
​Age 6 to 21SuppressedSuppressedSuppressedSuppressed12
​Local Total age < 21SuppressedSuppressedSuppressedSuppressed243
Long BeachAge < 63,93398.08%771.92%4,010
​Age 6 to 2147699.37%30.63%479
​Local Total age < 214,40998.22%801.78%4,489
Los AngelesAge < 688,30198.40%1,4381.60%89,739
​Age 6 to 2113,07097.90%2802.10%13,350
​Local Total age < 21101,37198.33%1,7181.67%103,089
MaderaAge < 63,13297.94%662.06%3,198
​Age 6 to 2126997.46%72.54%276
​Local Total age < 213,40197.90%732.10%3,474
MarinAge < 61,79098.57%261.43%1,816
​Age 6 to 2133397.08%102.92%343
​Local Total age < 212,12398.33%361.67%2,159
MariposaAge < 6SuppressedSuppressedSuppressedSuppressed68
​Age 6 to 21SuppressedSuppressedSuppressedSuppressed19
​Local Total age < 21SuppressedSuppressedSuppressedSuppressed87
MendocinoAge < 686196.96%273.04%888
​Age 6 to 2129100.00%00.00%29
​Local Total age < 2189097.06%272.94%917
MercedAge < 62,89198.30%501.70%2,941
​Age 6 to 2115198.05%31.95%154
​Local Total age < 213,04298.29%531.71%3,095
ModocAge < 6SuppressedSuppressedSuppressedSuppressed102
​Age 6 to 21SuppressedSuppressedSuppressedSuppressed6
​Local Total age < 21SuppressedSuppressedSuppressedSuppressed108
MonoAge < 6SuppressedSuppressedSuppressedSuppressed19
​Age 6 to 21SuppressedSuppressedSuppressedSuppressed5
​Local Total age < 21SuppressedSuppressedSuppressedSuppressed24
MontereyAge < 66,09497.08%1832.92%6,277
​Age 6 to 2162493.13%466.87%670
​Local Total age < 216,71896.70%2293.30%6,947
NapaAge < 688997.37%242.63%913
​Age 6 to 2149100.00%00.00%49
​Local Total age < 2193897.51%242.49%962
NevadaAge < 621491.45%208.55%234
​Age 6 to 2122100.00%00.00%22
​Local Total age < 2123692.19%207.81%256
OrangeAge < 624,68098.12%4721.88%25,152
​Age 6 to 212,35998.01%481.99%2,407
​Local Total age < 2127,03998.11%5201.89%27,559
PasadenaAge < 699998.04%201.96%1,019
​Age 6 to 2110497.20%32.80%107
​Local Total age < 211,10397.96%232.04%1,126
PlacerAge < 61,53098.52%231.48%1,553
​Age 6 to 2125196.54%93.46%260
​Local Total age < 211,78198.23%321.77%1,813
PlumasAge < 6SuppressedSuppressedSuppressedSuppressed79
​Age 6 to 21SuppressedSuppressedSuppressedSuppressed2
​Local Total age < 21SuppressedSuppressedSuppressedSuppressed81
RiversideAge < 629,08498.94%3111.06%29,395
​Age 6 to 211,93098.17%361.83%1,966
​Local Total age < 2131,01498.89%3471.11%31,361
SacramentoAge < 615,55696.83%5103.17%16,066
​Age 6 to 212,89490.30%3119.70%3,205
​Local Total age < 2118,45095.74%8214.26%19,271
San BenitoAge < 6SuppressedSuppressedSuppressedSuppressed642
​Age 6 to 21SuppressedSuppressedSuppressedSuppressed41
​Local Total age < 21SuppressedSuppressedSuppressedSuppressed683
San BernardinoAge < 624,89498.75%3161.25%25,210
​Age 6 to 212,72498.52%411.48%2,765
​Local Total age < 2127,61898.72%3571.28%27,975
San DiegoAge < 632,11997.97%6662.03%32,785
​Age 6 to 212,20491.83%1968.17%2,400
​Local Total age < 2134,32397.55%8622.45%35,185
San FranciscoAge < 66,94997.78%1582.22%7,107
​Age 6 to 2183798.70%111.30%848
​Local Total age < 217,78697.88%1692.12%7,955
San JoaquinAge < 69,17398.32%1571.68%9,330
​Age 6 to 2192697.47%242.53%950
​Local Total age < 2110,09998.24%1811.76%10,280
San Luis ObispoAge < 61,07596.50%393.50%1,114
​Age 6 to 214989.09%610.91%55
​Local Total age < 211,12496.15%453.85%1,169
San MateoAge < 64,81799.24%370.76%4,854
​Age 6 to 2160398.21%111.79%614
​Local Total age < 215,42099.12%480.88%5,468
Santa BarbaraAge < 65,38998.12%1031.88%5,492
​Age 6 to 2133494.62%195.38%353
​Local Total age < 215,72397.91%1222.09%5,845
Santa ClaraAge < 616,52498.27%2911.73%16,815
​Age 6 to 212,21895.19%1124.81%2,330
​Local Total age < 2118,74297.90%4032.10%19,145
Santa CruzAge < 61,94996.68%673.32%2,016
​Age 6 to 2126896.40%103.60%278
​Local Total age < 212,21796.64%773.36%2,294
ShastaAge < 61,15794.45%685.55%1,225
​Age 6 to 216496.97%23.03%66
​Local Total age < 211,22194.58%705.42%1,291
SierraAge < 6SuppressedSuppressedSuppressedSuppressed6
​Age 6 to 21SuppressedSuppressedSuppressedSuppressed5
​Local Total age < 21SuppressedSuppressedSuppressedSuppressed11
SiskiyouAge < 6SuppressedSuppressedSuppressedSuppressed59
​Age 6 to 21SuppressedSuppressedSuppressedSuppressed10
​Local Total age < 21SuppressedSuppressedSuppressedSuppressed69
SolanoAge < 63,77395.98%1584.02%3,931
​Age 6 to 2127496.48%103.52%284
​Local Total age < 214,04796.01%1683.99%4,215
SonomaAge < 62,56297.19%742.81%2,636
​Age 6 to 2135594.92%195.08%374
​Local Total age < 212,91796.91%933.09%3,010
StanislausAge < 65,86398.41%951.59%5,958
​Age 6 to 2185693.45%606.55%916
​Local Total age < 216,71997.75%1552.25%6,874
SutterAge < 61,09598.29%191.71%1,114
​Age 6 to 21SuppressedSuppressedSuppressedSuppressed113
​Local Total age < 21SuppressedSuppressedSuppressedSuppressed1,227
TehamaAge < 690097.72%212.28%921
​Age 6 to 21SuppressedSuppressedSuppressedSuppressed45
​Local Total age < 21SuppressedSuppressedSuppressedSuppressed966
TrinityAge < 6SuppressedSuppressedSuppressedSuppressed65
​Age 6 to 21SuppressedSuppressedSuppressedSuppressed4
​Local Total age < 21SuppressedSuppressedSuppressedSuppressed69
TulareAge < 64,63296.92%1473.08%4,779
​Age 6 to 2125098.04%51.96%255
​Local Total age < 214,88296.98%1523.02%5,034
TuolumneAge < 624494.94%135.06%257
​Age 6 to 2113100.00%00.00%13
​Local Total age < 2125795.19%134.81%270
VenturaAge < 67,34898.83%871.17%7,435
​Age 6 to 2142898.17%81.83%436
​Local Total age < 217,77698.79%951.21%7,871
YoloAge < 61,88996.62%663.38%1,955
​Age 6 to 2112693.33%96.67%135
​Local Total age < 212,01596.41%753.59%2,090
YubaAge < 673897.88%162.12%754
​Age 6 to 21SuppressedSuppressedSuppressedSuppressed55
​Local Total age < 21SuppressedSuppressedSuppressedSuppressed809
 CLPPBAge < 61100.00%00.00%1
​Age 6 to 2100.00%00.00%0
​Local Total age < 211100.00%00.00%1
California TotalsAge < 6368,49398.00%7,5142.00%376,007
 Age 6 to 2141,11996.36%1,5553.64%42,674
 
Local Total age < 21409,61297.83%9,0692.17%418,681

  • Data are from the RASSCLE surveillance database archive of 07/03/2023.
  • As of October 2021, the Centers for Disease Control and Prevention uses a blood lead reference value (BLRV) of 3.5 µg/dL to identify children with blood lead levels that are higher than most children's levels.
  • Each individual is counted only once, using their highest BLL during 2022.
  • Measures are in µg/dL of whole blood and include arterial, cord, venous, capillary, and unknown samples. Not all elevated capillary samples are confirmed by a follow-up venous sample.
  • Results later determined to be false positives or errors have been excluded.
  • All results of blood lead analyses are reportable under California law, and the State works to ensure complete reporting. Results that are not submitted to the State, however, would not be included here.
  • Patient jurisdiction is determined by geocoding the address associated with the child's highest BLL using Esri's StreetMap Premium North America locator.
  • Data are suppressed for local health jurisdictions that did not have enough blood lead tests in 2022 to meet the California Health and Human Services Agency's Data De-Identification Guidelines for public release.

Blood Lead Maps and Data

Map 1: Percent of Children Under 6 Years Old with a Blood Lead Level of 3.5 micrograms per deciliter (µg/dL) or Greater, by California Local Health Jurisdiction, 2022​

Map of children exposed to lead in California. See data in Table 1. 

  • Data are from the RASSCLE surveillance database archive of 07/03/2023.
  • Each individual is counted only once, using their highest blood lead level (BLL) during 2022.
  • Measures are in micrograms per deciliter (µg/dL) of whole blood and include arterial, cord, venous, capillary, and unknown samples. Not all elevated capillary samples are confirmed by a follow-up venous sample.
  • Results later determined to be false positives or errors have been excluded.
  • All results of blood lead analyses are reportable under California law, and the State works to ensure complete reporting. Results that are not submitted to the State, however, would not be included here.
  • Patient jurisdiction is determined by geocoding the address associated with the child's highest BLL using Esri's StreetMap Premium North America locator.
  • Data are suppressed for local health jurisdictions that did not have enough blood lead tests in 2022 to meet the California Health and Human Services Agency's Data De-Identification Guidelines for public release. Therefore, not all jurisdictions are shown in this map.
  • Refer to Table 1 for data.​​​​

Table 1. California Local Health Jurisd​ictions, by Percent of Children Under 6 Years Old with a Blood Lead Level of 3.5 micrograms per deciliter (µg/dL) or Greater, in Descending Order, 2022

Local Health JurisdictionBlood Lead Level (BLL) < 3.5​​ nBLL < 3.5% (row)

BLL ≥ 3.5

n

BLL ≥ 3.5% (row)Total Number of Children Under 6 with a BLL
Nevada214 91.45%20 8.55%234
Humboldt1,540 92.16%131 7.84%1,671
Shasta1,157 94.45%68 5.55%1,225
Tuolumne244 94.94%13 5.06%257
Berkeley576 95.52%27 4.48%603
Fresno10,151 95.91%433 4.09%10,584
Solano3,773 95.98%158 4.02%3,931
San Luis Obispo1,075 96.50%39 3.50%1,114
Yolo1,889 96.62%66 3.38%1,955
Santa Cruz1,949 96.68%67 3.32%2,016
Sacramento15,556 96.83%510 3.17%16,066
Alameda14,150 96.86%458 3.14%14,608
Tulare4,632 96.92%147 3.08%4,779
Mendocino861 96.96%27 3.04%888
Monterey6,094 97.08%183 2.92%6,277
Sonoma2,562 97.19%74 2.81%2,636
Napa889 97.37%24 2.63%913
El Dorado603 97.42%16 2.58%619
Kings1,452 97.71%34 2.29%1,486
Tehama900 97.72%21 2.28%921
Contra Costa7,167 97.74%166 2.26%7,333
Butte1,436 97.75%33 2.25%1,469
Suppressed Jurisdictions3,169 97.78%72 2.22%3,241
San Francisco6,949 97.78%158 2.22%7,107
Yuba738 97.88%16 2.12%754
Kern12,652 97.89%273 2.11%12,925
Madera3,132 97.94%66 2.06%3,198
San Diego32,119 97.97%666 2.03%32,785
Pasadena999 98.04%20 1.96%1,019
Long Beach3,933 98.08%77 1.92%4,010
Orange24,680 98.12%472 1.88%25,152
Santa Barbara5,389 98.12%103 1.88%5,492
Santa Clara16,524 98.27%291 1.73%16,815
Sutter1,095 98.29%19 1.71%1,114
Merced2,891 98.30%50 1.70%2,941
San Joaquin9,173 98.32%157 1.68%9,330
Los Angeles88,301 98.40%1,438 1.60%89,739
Stanislaus5,863 98.41%95 1.59%5,958
Placer1,530 98.52%23 1.48%1,553
Marin1,790 98.57%26 1.43%1,816
San Bernardino24,894 98.75%316 1.25%25,210
Ventura7,348 98.83%87 1.17%7,435
Riverside29,084 98.94%311 1.06%29,395
Imperial2,552 98.99%26 1.01%2,578
San Mateo4,817 99.24%37 0.76%4,854
CLPPB1 100.00%0 0.00%1 
  • Data are from the RASSCLE surveillance database archive of 07/03/2023.
  • Each individual is counted only once, using their highest blood lead level (BLL) during 2022.
  • Measures are in micrograms per deciliter (µg/dL) of whole blood and include arterial, cord, venous, capillary, and unknown samples. Not all elevated capillary samples are confirmed by a follow-up venous sample.
  • Results later determined to be false positives or errors have been excluded.
  • All results of blood lead analyses are reportable under California law, and the State works to ensure complete reporting. Results that are not submitted to the State, however​, would not be included here.
  • Patient jurisdiction is determined by geocoding the address associated with the child's highest BLL using Esri's StreetMap Premium North America locator.
  • Data are suppressed for local health jurisdictions that did not have enough blood lead tests in 2022 to meet the California Health and Human Services Agency's Data De-Identification Guidelines for public release. Therefore, not all jurisdictions are shown in this table. Suppressed jurisdictions include Alpine, Amador, Calaveras, Colusa, Del Norte, Glenn, Inyo, Lake, Lassen, Mariposa, Modoc, Mono, Plumas, San Benito, Sierra, Siskiyou, and Trinity.​
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