Estimated median house or condo value in 2019: $933,600 (it was $301,400 in 2000)
Irvine:
$933,600
CA:
$568,500
Mean prices in 2019:all housing units: over $1,000,000; detached houses: over $1,000,000; townhouses or other attached units: $769,070; in 2-unit structures: over $1,000,000; in 3-to-4-unit structures: $675,705; in 5-or-more-unit structures: $652,080; mobile homes: $383,343
Median gross rent in 2019: $2,480.
March 2019 cost of living index in Irvine: 89.3 (less than average, U.S. average is 100)
Percentage of residents living in poverty in 2019: 13.8%
(10.8% for White Non-Hispanic residents, 21.8% for Black residents, 17.8% for Hispanic or Latino residents, 4.8% for American Indian residents, 19.1% for Native Hawaiian and other Pacific Islander residents, 20.4% for other race residents, 7.2% for two or more races residents)
According to our research of California and other state lists, there were 47 registered sex offenders living in Irvine, California as of June 09, 2023. The ratio of all residents to sex offenders in Irvine is 5,662 to 1. The ratio of registered sex offenders to all residents in this city is much lower than the state average.
Crime rates in Irvine by year
Type
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
Murders (per 100,000)
4 (2.1)
4 (2.0)
1 (0.5)
3 (1.4)
0 (0.0)
2 (0.9)
2 (0.9)
2 (0.8)
0 (0.0)
2 (0.8)
3 (1.1)
2 (0.7)
0 (0.0)
1 (0.3)
Rapes (per 100,000)
17 (9.0)
19 (9.4)
18 (8.6)
28 (13.0)
24 (11.1)
11 (5.1)
8 (3.7)
12 (5.1)
28 (11.5)
27 (10.5)
41 (15.4)
46 (16.7)
40 (13.9)
52 (17.8)
Robberies (per 100,000)
50 (26.5)
44 (21.8)
54 (25.8)
55 (25.5)
40 (18.4)
40 (18.6)
29 (13.3)
38 (16.1)
36 (14.8)
57 (22.1)
52 (19.5)
55 (19.9)
53 (18.4)
66 (22.6)
Assaults (per 100,000)
55 (29.2)
76 (37.6)
56 (26.8)
67 (31.1)
56 (25.8)
67 (31.2)
71 (32.6)
61 (25.9)
56 (23.0)
58 (22.5)
56 (21.0)
66 (23.9)
67 (23.3)
69 (23.6)
Burglaries (per 100,000)
634 (336.3)
637 (315.5)
452 (216.0)
481 (223.0)
480 (221.0)
513 (238.7)
570 (262.0)
583 (247.2)
575 (236.7)
523 (202.6)
640 (240.0)
627 (227.1)
621 (215.6)
574 (196.1)
Thefts (per 100,000)
2,147 (1,139)
2,404 (1,191)
2,556 (1,221)
2,365 (1,097)
2,197 (1,012)
2,649 (1,233)
2,599 (1,195)
2,553 (1,083)
2,344 (964.7)
3,144 (1,218)
2,918 (1,094)
2,814 (1,019)
2,840 (985.9)
3,086 (1,054)
Auto thefts (per 100,000)
253 (134.2)
215 (106.5)
203 (97.0)
150 (69.5)
121 (55.7)
118 (54.9)
135 (62.1)
149 (63.2)
126 (51.9)
201 (77.8)
179 (67.1)
194 (70.3)
198 (68.7)
163 (55.7)
Arson (per 100,000)
35 (18.6)
53 (26.3)
44 (21.0)
32 (14.8)
23 (10.6)
17 (7.9)
22 (10.1)
10 (4.2)
8 (3.3)
8 (3.1)
9 (3.4)
10 (3.6)
9 (3.1)
9 (3.1)
City-Data.com crime index
105.1
103.8
92.7
92.1
79.9
88.2
86.4
81.4
77.6
90.1
90.5
87.8
81.3
86.7
The City-Data.com crime index weighs serious crimes and violent crimes more heavily. Higher means more crime, U.S. average is 270.6. It adjusts for the number of visitors and daily workers commuting into cities.
- means the value is smaller than the state average. - means the value is about the same as the state average. - means the value is bigger than the state average.
Ancestries: Iranian (6.0%), American (2.5%), German (2.3%), Irish (1.9%), English (1.8%), European (1.7%).
Current Local Time: PST time zone
Elevation: 70 feet
Land area: 46.2 square miles.
Population density: 6,223 people per square mile (high).
114,791 residents are foreign born (12.7% Asia).
This city:
41.9%
California:
26.8%
Median real estate property taxes paid for housing units with mortgages in 2019: $8,816 (0.9%) Median real estate property taxes paid for housing units with no mortgage in 2019: $6,089 (0.7%)
Nearest city with pop. 200,000+: Santa Ana, CA (6.4 miles , pop. 337,977).
Nearest city with pop. 1,000,000+: Los Angeles, CA (43.5 miles , pop. 3,694,820).
Air Quality Index (AQI) level in 2018 was 119. This is significantly worse than average.
City:
119
U.S.:
74
Carbon Monoxide (CO) [ppm] level in 2018 was 0.253. This is about average.Closest monitor was 4.7 miles away from the city center.
City:
0.253
U.S.:
0.267
Nitrogen Dioxide (NO2) [ppb] level in 2018 was 13.5. This is significantly worse than average.Closest monitor was 4.7 miles away from the city center.
City:
13.5
U.S.:
5.6
Sulfur Dioxide (SO2) [ppb] level in 2016 was 0.113. This is significantly better than average.Closest monitor was 4.7 miles away from the city center.
City:
0.113
U.S.:
1.789
Ozone [ppb] level in 2018 was 31.5. This is about average.Closest monitor was 6.4 miles away from the city center.
City:
31.5
U.S.:
33.3
Particulate Matter (PM10) [µg/m3] level in 2018 was 27.5. This is significantly worse than average.Closest monitor was 5.7 miles away from the city center.
City:
27.5
U.S.:
19.6
Particulate Matter (PM2.5) [µg/m3] level in 2018 was 12.5. This is significantly worse than average.Closest monitor was 7.7 miles away from the city center.
City:
12.5
U.S.:
8.5
Lead (Pb) [µg/m3] level in 2013 was 0.00274. This is significantly better than average.Closest monitor was 6.4 miles away from the city center.
City:
0.00274
U.S.:
0.00984
Earthquake activity:
Irvine-area historical earthquake activity is significantly above California state average. It is 6801% greater than the overall U.S. average.
On 6/28/1992 at 11:57:34, a magnitude 7.6 (6.2 MB, 7.6 MS, 7.3 MW, Depth: 0.7 mi, Class: Major, Intensity: VIII - XII) earthquake occurred 80.2 miles away from the city center, causing 3 deaths (1 shaking deaths, 2 other deaths) and 400 injuries, causing $100,000,000 total damage and $40,000,000 insured losses On 7/21/1952 at 11:52:14, a magnitude 7.7 (7.7 UK) earthquake occurred 114.2 miles away from the city center, causing $50,000,000 total damage On 10/16/1999 at 09:46:44, a magnitude 7.4 (6.3 MB, 7.4 MS, 7.2 MW, 7.3 ML) earthquake occurred 96.7 miles away from the city center On 4/21/1918 at 22:32:30, a magnitude 6.8 (6.8 UK, Class: Strong, Intensity: VII - IX) earthquake occurred 22.1 miles away from the city center On 5/19/1940 at 04:36:40, a magnitude 7.2 (7.2 UK) earthquake occurred 125.1 miles away from the city center, causing $33,000,000 total damage On 11/4/1927 at 13:51:53, a magnitude 7.5 (7.5 UK) earthquake occurred 203.7 miles away from the city center Magnitude types: body-wave magnitude (MB), local magnitude (ML), surface-wave magnitude (MS), moment magnitude (MW)
Natural disasters:
The number of natural disasters in Orange County (32) is a lot greater than the US average (15). Major Disasters (Presidential) Declared: 22 Emergencies Declared: 2
Causes of natural disasters: Floods: 15, Fires: 13, Storms: 9, Landslides: 6, Winter Storms: 6, Mudslides: 5, Earthquakes: 2, Heavy Rain: 1, Hurricane: 1, Snow: 1, Tornado: 1, Wind: 1, Other: 1 (Note: some incidents may be assigned to more than one category).
Main business address for: GRADCO SYSTEMS INC (OFFICE MACHINES, NEC), INTRALASE CORP (ELECTROMEDICAL & ELECTROTHERAPEUTIC APPARATUS), WNC HOUSING TAX CREDIT FUND VI LP SERIES 11 (OPERATORS OF APARTMENT BUILDINGS), LANTRONIX INC (COMPUTER COMMUNICATIONS EQUIPMENT), CONSUMER PORTFOLIO SERVICES INC (FINANCE SERVICES), ISTA PHARMACEUTICALS INC (IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES), WNC HOUSING TAX CREDIT FUND VI LP SERIES 9 (OPERATORS OF APARTMENT BUILDINGS), WNC HOUSING TAX CREDIT FUND VI LP SERIES 7 (OPERATORS OF APARTMENT BUILDINGS) and 57 other public companies.
Stanbridge College (Full-time enrollment: 1,312; Location: 2041 Business Ctr Dr Ste 107; Private, for-profit; Website: www.stanbridge.edu; Offers Master's degree)
Fashion Institute of Design & Merchandising-Orange County (Full-time enrollment: 269; Location: 17590 Gillette Avenue; Private, for-profit; Website: FIDM.edu)
The Chicago School of Professional Psychology at Irvine (Full-time enrollment: 87; Location: 4199 Campus Dr; Private, not-for-profit; Website: www.thechicagoschool.edu; Offers Doctor's degree)
Other colleges/universities with over 2000 students near Irvine:
University of Phoenix-Southern California Campus (about 6 miles; Costa Mesa, CA; Full-time enrollment: 8,110)
Vanguard University of Southern California (about 7 miles; Costa Mesa, CA; FT enrollment: 2,104)
Coastline Community College (about 7 miles; Fountain Valley, CA; FT enrollment: 4,591)
Orange Coast College (about 7 miles; Costa Mesa, CA; FT enrollment: 12,918)
Santa Ana College (about 8 miles; Santa Ana, CA; FT enrollment: 11,756)
Santiago Canyon College (about 8 miles; Orange, CA; FT enrollment: 6,050)
Chapman University (about 9 miles; Orange, CA; FT enrollment: 7,089)
Public high schools in Irvine:
UNIVERSITY HIGH(Students: 1,713, Location: 4771 CAMPUS DR., Grades: 9-12)
I have an addition to the category "biggest private primary/middle schools in Irvine": LePort Upper Elementary and Montessori PreSchool/Lower Elementary(Students: 120; Location: 26 Lake Road & 4712 Barranca Parkway; Grades 18 months through Grade 8)
Notable locations in Irvine: Irvine Ranch (A), South Coast Gun Club (B), Rancho San Joaquin Golf Course (C), International Raceway (D), Heritage Park Library (E), Orange County Public Library - University Park Branch (F), Orange County Fire Authority Station 55 (G), Orange County Fire Authority Station 51 (H), Orange County Fire Authority Station 6 (I), Orange County Fire Authority Station 4 (J), Orange County Fire Authority Station 26 (K), Orange County Fire Authority Station 28 (L), Orange County Fire Authority Station 47 (M), Orange County Fire Authority Station 38 (N), Orange County Fire Authority Station 36 (O). Display/hide their locations on the map
Shopping Centers: Northpark Plaza Shopping Center (1), Walnut Village Shopping Center (2), Parkview Shopping Center (3), Orange Tree Square Shopping Center (4), Irvine Village Shopping Center (5), Heritage Plaza Shopping Center (6), Culver Plaza Shopping Center (7), Arbor Village Shopping Center (8), Woodbridge Village Shopping Center (9). Display/hide their locations on the map
Main business address in Irvine include: GRADCO SYSTEMS INC (A), INTRALASE CORP (B), WNC HOUSING TAX CREDIT FUND VI LP SERIES 11 (C), LANTRONIX INC (D), CONSUMER PORTFOLIO SERVICES INC (E), ISTA PHARMACEUTICALS INC (F), WNC HOUSING TAX CREDIT FUND VI LP SERIES 9 (G), WNC HOUSING TAX CREDIT FUND VI LP SERIES 7 (H). Display/hide their locations on the map
Streams, rivers, and creeks: Hicks Canyon Wash (A), Bee Canyon Wash (B), Agua Chinon Wash (C), Borrego Canyon Wash (D), Serrano Creek (E), Sand Canyon Wash (F), Rattlesnake Canyon Wash (G). Display/hide their locations on the map
Parks in Irvine include: Crestwood Park (1), William R Mason Regional Park (2), San Joaquin Freshwater Marsh Reserve (3), Brywood Park (4), Culverdale Wilderness Park (5), Culverwood Wilderness Park (6), Northwood Community Park (7), Silkwood Park (8), Aldrich Park (9). Display/hide their locations on the map
Tourist attractions: Wild Rivers Water Park (Water Parks & Slides; 8770 Irvine Center Drive) (1), Boomers (Amusement & Theme Parks; 3405 Michelson Drive) (2). Display/hide their approximate locations on the map
Birthplace of: Aaron Peirsol - Athlete, Rebecca Black - Singer, Will Ferrell - (born 1967), comedian, Ezra Klein - Journalist, Jason Lezak - International swimmer, Tim Commerford - Heavy metal bass guitarist, Dylan Axelrod - Baseball player, Greg Behrendt - Television writer, Nicole Parker - Comedian, Adam Keefe (basketball) - Basketball player.
Orange County has a predicted average indoor radon screening level less than 2 pCi/L (pico curies per liter) - Low Potential
Drinking water stations with addresses in Irvine and their reported violations in the past:
BIG VALLEY WOODS WATER CORP (Serves OR,Population served: 350, Groundwater):
Past monitoring violations:
Failure to Conduct Assessment Monitoring - Between JAN-2012 and DEC-2012, Contaminant: COLIPHAGE. Follow-up actions: St Violation/Reminder Notice (FEB-04-2013), St Compliance achieved (FEB-25-2013)
Monitoring and Reporting (DBP) - Between JAN-2010 and DEC-2010, Contaminant: Total Haloacetic Acids (HAA5). Follow-up actions: St Violation/Reminder Notice (FEB-22-2011), St Compliance achieved (APR-27-2012)
Monitoring and Reporting (DBP) - Between JAN-2010 and DEC-2010, Contaminant: TTHM. Follow-up actions: St Violation/Reminder Notice (FEB-22-2011), St Compliance achieved (APR-27-2012)
Monitoring and Reporting (DBP) - Between JAN-2008 and DEC-2008, Contaminant: TTHM. Follow-up actions: St Compliance achieved (SEP-10-2009)
Monitoring and Reporting (DBP) - Between JAN-2008 and DEC-2008, Contaminant: Total Haloacetic Acids (HAA5). Follow-up actions: St Compliance achieved (SEP-10-2009)
One minor monitoring violation
96 regular monitoring violations
ARROWHEAD MOBILE HOME PARK (Serves OR,Population served: 220, Groundwater):
Past monitoring violations:
Monitoring, Source Water (GWR) - In AUG-17-2012, Contaminant: E. COLI. Follow-up actions: St Violation/Reminder Notice (OCT-01-2012)
One routine major monitoring violation
FIRST AMERICAN STORAGE (Serves TX,Population served: 200, Groundwater):
Monitoring and Reporting (DBP) - Between JUL-2012 and SEP-2012, Contaminant: Chlorine. Follow-up actions: St Formal NOV issued (FEB-13-2013), St AO (w/penalty) issued (NOV-16-2013), St Compliance achieved (DEC-30-2013)
Monitoring and Reporting (DBP) - Between JAN-2012 and MAR-2012, Contaminant: Chlorine. Follow-up actions: St Formal NOV issued (FEB-13-2013), St AO (w/penalty) issued (NOV-16-2013), St Compliance achieved (DEC-30-2013)
Monitoring and Reporting (DBP) - Between JAN-2008 and DEC-2010, Contaminant: Total Haloacetic Acids (HAA5). Follow-up actions: St Formal NOV issued (FEB-13-2013), St Compliance achieved (AUG-30-2013), St AO (w/penalty) issued (NOV-16-2013)
Monitoring and Reporting (DBP) - Between JAN-2008 and DEC-2010, Contaminant: TTHM. Follow-up actions: St Formal NOV issued (FEB-13-2013), St Compliance achieved (AUG-09-2013), St AO (w/penalty) issued (NOV-16-2013)
52 regular monitoring violations
Average household size:
This city:
2.6 people
California:
2.9 people
Percentage of family households:
This city:
65.1%
Whole state:
68.7%
Percentage of households with unmarried partners:
This city:
4.7%
Whole state:
7.2%
Likely homosexual households (counted as self-reported same-sex unmarried-partner households)
Lesbian couples: 0.3% of all households
Gay men: 0.3% of all households
People in group quarters in Irvine in 2010:
5,705 people in college/university student housing
526 people in local jails and other municipal confinement facilities
206 people in group homes intended for adults
55 people in nursing facilities/skilled-nursing facilities
31 people in other noninstitutional facilities
22 people in workers' group living quarters and job corps centers
7 people in group homes for juveniles (non-correctional)
4 people in emergency and transitional shelters (with sleeping facilities) for people experiencing homelessness
People in group quarters in Irvine in 2000:
6,852 people in college dormitories (includes college quarters off campus)
130 people in other noninstitutional group quarters
103 people in nursing homes
13 people in homes for the mentally retarded
12 people in other group homes
2 people in other nonhousehold living situations
Arena or stadium:
Bren Events Center. University of California, Irvine.
Banks with most branches in Irvine (2011 data):
Wells Fargo Bank, National Association: 12 branches. Info updated 2011/04/05: Bank assets: $1,161,490.0 mil, Deposits: $905,653.0 mil, headquarters in Sioux Falls, SD, positive income, 6395 total offices, Holding Company: Wells Fargo & Company
JPMorgan Chase Bank, National Association: 10 branches. Info updated 2011/11/10: Bank assets: $1,811,678.0 mil, Deposits: $1,190,738.0 mil, headquarters in Columbus, OH, positive income, International Specialization, 5577 total offices, Holding Company: Jpmorgan Chase & Co.
Bank of America, National Association: 9 branches. Info updated 2009/11/18: Bank assets: $1,451,969.3 mil, Deposits: $1,077,176.8 mil, headquarters in Charlotte, NC, positive income, 5782 total offices, Holding Company: Bank Of America Corporation
Union Bank, National Association: 7 branches. Info updated 2011/09/01: Bank assets: $88,967.5 mil, Deposits: $65,286.4 mil, headquarters in San Francisco, CA, positive income, Commercial Lending Specialization, 403 total offices, Holding Company: Mitsubishi Ufj Financial Group, Inc.
U.S. Bank National Association: Irvine Albertsons Branch, Irvine Yale Avenue Branch, Irvine Branch, Culver & Portola Pavilions Branch, Woodbridge Ralphs Office, Michelson Branch. Info updated 2012/01/30: Bank assets: $330,470.8 mil, Deposits: $236,091.5 mil, headquarters in Cincinnati, OH, positive income, 3121 total offices, Holding Company: U.S. Bancorp
East West Bank: 99 Irvine Walnut Branch, Irvine Branch, Irvine Branch, Irvine Branch, 99 Irvine-Culver Branch. Info updated 2010/06/14: Bank assets: $21,962.4 mil, Deposits: $17,501.8 mil, headquarters in Pasadena, CA, positive income, Commercial Lending Specialization, 131 total offices, Holding Company: East West Bancorp, Inc.
City National Bank: South Orange County Banking Office B, Orange County Airport Branch, Irvine Branch. Info updated 2011/04/11: Bank assets: $23,303.6 mil, Deposits: $20,475.9 mil, headquarters in Los Angeles, CA, positive income, Commercial Lending Specialization, 86 total offices, Holding Company: City National Corporation
Bank of the West: Irvine Branch at 18022 Culver Drive, branch established on 1966/10/07; Central Irvine Branch at 14477 Culver Drive, branch established on 2000/02/01. Info updated 2009/11/16: Bank assets: $62,408.3 mil, Deposits: $43,995.2 mil, headquarters in San Francisco, CA, positive income, 647 total offices, Holding Company: Bnp Paribas
Citibank, National Association: Irvine Woodbury Branch at 6436 Irvine Blvd, branch established on 2006/12/20; Irvine Branch at 3996 Barranca Parkway, branch established on 2006/10/01. Info updated 2012/01/10: Bank assets: $1,288,658.0 mil, Deposits: $882,541.0 mil, headquarters in Sioux Falls, SD, positive income, International Specialization, 1048 total offices, Holding Company: Citigroup Inc.
Religion statistics for Irvine, CA (based on Orange County data)
Religion
Adherents
Congregations
Catholic
797,473
67
Evangelical Protestant
345,893
894
Other
141,815
329
Mainline Protestant
76,574
202
Orthodox
13,406
19
Black Protestant
2,424
8
None
1,632,647
-
Source: Clifford Grammich, Kirk Hadaway, Richard Houseal, Dale E.Jones, Alexei Krindatch, Richie Stanley and Richard H.Taylor. 2012. 2010 U.S.Religion Census: Religious Congregations & Membership Study. Association of Statisticians of American Religious Bodies. Jones, Dale E., et al. 2002. Congregations and Membership in the United States 2000. Nashville, TN: Glenmary Research Center. Graphs represent county-level data
2005 - 2018 National Fire Incident Reporting System (NFIRS) incidents
According to the data from the years 2005 - 2018 the average number of fires per year is 241. The highest number of reported fires - 327 took place in 2005, and the least - 163 in 2012. The data has a dropping trend.
When looking into fire subcategories, the most reports belonged to: Outside Fires (36.1%), and Structure Fires (28.9%).
Fire incident types reported to NFIRS in Irvine, CA
#9 on the list of "Top 101 cities that people commute into (largest positive percentage daily daytime population change due to commuting) (population 50,000+)"
#14 on the list of "Top 100 cities with highest median household income and median resident age less than 35 (pop. 50,000+)"
#18 on the list of "Top 101 cities with the lowest city-data.com crime index (population 50,000+)"
#19 on the list of "Top 101 cities with largest percentage of females in occupations: management occupations (population 50,000+)"
#23 on the list of "Top 101 cities with the lowest number of assaults per 100,000 residents (population 50,000+)"
#26 on the list of "Top 101 cities with the lowest number of burglaries per 100,000 residents (population 50,000+)"
#27 on the list of "Top 101 larger cities with the highest increase in house/condo value from 2000 (population 50,000+)"
#28 on the list of "Top 101 cities with the most residents born in Other South Eastern Asia (population 500+)"
#30 on the list of "Top 100 safest cities (lowest city-data.com crime index) (pop. 50,000+)"
#33 on the list of "Top 100 cities with highest median house value (pop. 50,000+)"
#34 on the list of "Top 101 cities with largest percentage of males in occupations: computer and mathematical occupations (population 50,000+)"
#36 on the list of "Top 101 cities with largest percentage of males in occupations: business and financial operations occupations (population 50,000+)"
#36 on the list of "Top 101 cities with the smallest temperature differences during a year (population 50,000+)"
#37 on the list of "Top 101 cities with largest percentage of males in occupations: health diagnosing and treating practitioners and other technical occupations (population 50,000+)"
#37 on the list of "Top 101 cities with the lowest number of police officers per 1000 residents (population 50,000+)"
#39 on the list of "Top 101 cities with the most residents born in Iran (population 500+)"
#39 on the list of "Top 101 cities with the most residents born in Taiwan (population 500+)"
#39 on the list of "Top 101 cities with largest percentage of males in industries: professional, scientific, and technical services (population 50,000+)"
#42 on the list of "Top 101 cities with the most people having professional degrees (population 50,000+)"
#43 on the list of "Top 100 best educated cities (highest percentage of bachelor degree holding residents) (pop. 50,000+)"
#28 (92618) on the list of "Top 101 zip codes with the most medium-big companies in 2005 (at least 100 employees)"
#29 (92618) on the list of "Top 101 zip codes with the most Internet business establishments in 2005"
#54 (92612) on the list of "Top 101 zip codes with the most finance and insurance companies in 2005"
#90 (92618) on the list of "Top 101 zip codes with the largest percentage of Arab first ancestries (pop 5,000+)"
#91 (92612) on the list of "Top 101 zip codes with the most offices of lawyers in 2005"
#4 on the list of "Top 101 counties with the highest total withdrawal of fresh water for public supply"
#5 on the list of "Top 101 counties with the most Catholic adherents"
#6 on the list of "Top 101 counties with the highest ground withdrawal of fresh water for public supply"
#7 on the list of "Top 101 counties with the most Evangelical Protestant adherents"
#8 on the list of "Top 101 counties with the highest Particulate Matter (PM2.5) Annual air pollution readings in 2012 (µg/m3)"