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FundersCA

Grants paid by California Air Pollution Control Officers Association

EIN 77-0058264 · Sacramento, CA · Form 990, Schedule I

California Air Pollution Control Officers Association of Sacramento, CA (EIN 77-0058264) reported 180 grants paid totaling $19,271,646 to 46 recipients in tax years 2018–2025, on Form 990, Schedule I. Derived from IRS e-file data, dataset version 2026.09.0, built 2026-09-03.

Grants paid

$19,271,646

180 grants

Recipients

46

distinct organizations

Tax years

2018–2025

8 filings in the corpus

By tax year

Grants by tax year, as the same figures
Tax yearGrants paidAmount paidApproved for future
201826$4,757,436
201922$1,645,548
202025$1,466,996
202117$1,215,596
202219$1,849,456
202328$1,759,740
202422$1,288,233
202521$5,288,641

Top recipients

The 46 recipients receiving the most from California Air Pollution Control Officers Association, by grants paid, out of 46 distinct recipients.

Recipients ranked by total grants paid
RecipientMatchLocationGrantsTotal paidLatest year
San Luis Obispo County Apcd 77-0413132ASan Luis Obispo, CA8$1,853,3572025
Mojave Desert Aqmd 33-0567447AVictorville, CA8$1,734,7022025
Northern Sierra Aqmd 68-0124279AGrass Valley, CA8$1,572,4822025
Great Basin Unified Apcd 95-6005445ABishop, CA8$1,326,9142025
Yolo-Solano Aqmd 90-0833440ADavis, CA8$1,243,8882025
Placer County Apcd 94-6000527AAuburn, CA8$1,099,1472025
Imperial County Apcd 95-6000924AEl Centro, CA8$1,057,3642025
Butte County Aqmd 91-1765957AChico, CA8$1,054,3002025
San Joaquin Valley Apcd 77-0262563AFresno, CA8$823,8852025
Eastern Kern County Apcd 95-6000925ABakersfield, CA8$821,6962025
North Coast Unified Aqmd 71-0936768AEureka, CA8$705,1812025
Mendocino County Aqmd 94-6000520AUkiah, CA8$631,4062025
Siskiyou County Apcd 94-6000537AYreka, CA8$577,9222025
El Dorado County Aqmd 94-6000511APlacerville, CA3$561,9302020
Santa Barbara County Apcd 77-0384167ASanta Barbara, CA8$516,6422025
Shasta County Aqmd 94-6000535ARedding, CA8$504,9372025
Lake County Aqmd 94-6000825ALakeport, CA7$461,8852024
Tehama County Apcd 94-6000543ARed Bluff, CA7$410,9502025
Monterey Bay Ard 94-2301821AMonterey, CA4$408,8562025
Russel Sigler Inc 86-0223222ASacramento, CA1$247,0432023
Feather River Aqmd 68-0271857AYuba City, CA1$192,6622018
Glenn County Apcd 94-6000691AWillows, CA2$186,6872020
Bay Area Aqmd 94-1622746ASan Francisco, CA3$182,2442023
Lassen County Apcd 94-6000439ASusanville, CA1$135,0002018
Tuolumne County Apcd 94-6000547ASonora, CA1$135,0002018
Smarter HepaUHeber City, UT1$132,3032023
Colusa County Apcd 94-6000508AColusa, CA1$112,5002018
Mariposa County Aqmd 94-6000880AMariposa, CA2$99,5002020
Antelope Valley Aqmd 56-2538501ALancaster, CA3$92,8322024
Calaveras County Apcd 94-6000507ASan Andreas, CA1$90,0002018
Genesis Air Inc 85-0484538AAndrews, TX1$65,8842023
Sacramento Metro Aqmd 68-0382186ASacramento, CA4$36,3492024
Siskiyou County ApcdUDavis, CA1$29,4102024
South Coast Aqmd 68-1234567ADiamond Bar, CA2$25,6492019
California Air Resources Board 68-0822069ASacramento, CA1$24,8442024
El Dorado County AqmdUPlacerville, CA2$21,5782025
Ventura County Apcd 95-6000944AVentura, CA2$17,9942020
US Air Purifiers LLC 45-4626824APeoria, IL1$12,9162023
San Diego County ApcdUSacramento, CA1$12,6062024
Feather River AqmdUYuba City, CA1$11,8642025
Irobot CorporationUBedford, MA1$8,3372023
Ca Air Resources Board 68-0288069ASacramento, CA1$7,4092020
Alen Corporation 94-6000334ADallas, TX1$6,5212023
Calaveras County ApcdUSan Andreas, CA1$5,7882025
Glenn County Apcd 68-0071760DWillows, CA1$5,7032025
Medify Air 82-3035883ABoca Raton, FL1$5,5792023

Match tier: A Reported EIN · B Exact name and place · C Strong name match · D Probable name match · U Unresolved. Tiers C and D are inferred, not reported; see how matching works.

Every grant

All 180 grant rows this organization reported, most recent first.

Grants reported by California Air Pollution Control Officers Association
Tax yearRecipientMatchAmountTypePurposeSource filing
2025Mojave Desert Aqmd Victorville, CAA$783,212paidGRANT202621769349301007
2025San Luis Obispo County Apcd San Luis Obispo, CAA$743,501paidGRANT202621769349301007
2025San Joaquin Valley Apcd Fresno, CAA$567,703paidGRANT202621769349301007
2025Northern Sierra Aqmd Grass Valley, CAA$566,634paidGRANT202621769349301007
2025Yolo-Solano Aqmd Davis, CAA$382,615paidGRANT202621769349301007
2025Siskiyou County Apcd Yreka, CAA$357,431paidGRANT202621769349301007
2025Placer County Apcd Auburn, CAA$290,610paidGRANT202621769349301007
2025Butte County Aqmd Chico, CAA$240,608paidGRANT202621769349301007
2025North Coast Unified Apcd Eureka, CAA$227,769paidGRANT202621769349301007
2025Shasta County Aqmd Redding, CAA$227,256paidGRANT202621769349301007
2025Eastern Kern Apcd Bakersfield, CAA$224,002paidGRANT202621769349301007
2025Santa Barbara County Apcd Santa Barbara, CAA$157,476paidGRANT202621769349301007
2025Tehama County Apcd Red Bluff, CAA$157,432paidGRANT202621769349301007
2025Mendocino County Aqmd Ukiah, CAA$157,431paidGRANT202621769349301007
2025Imperial County Apcd El Centro, CAA$89,980paidGRANT202621769349301007
2025Great Basin Unified Apcd Bishop, CAA$74,948paidGRANT202621769349301007
2025Feather River Aqmd Yuba City, CAU$11,864paidGRANT202621769349301007
2025Monterey Bay Ard Monterey, CAA$10,234paidGRANT202621769349301007
2025El Dorado County Aqmd Placerville, CAU$6,444paidGRANT202621769349301007
2025Calaveras County Apcd San Andreas, CAU$5,788paidGRANT202621769349301007
2025Glenn County Apcd Willows, CAD$5,703paidGRANT202621769349301007
2024Great Basin Unified Apcd Bishop, CAA$177,615paid202511829349301716
2024Placer County Apcd Grass Valley, CAA$158,515paid202511829349301716
2024Mojave Desert Aqmd Victorville, CAA$122,217paid202511829349301716
2024Yolo-Solano Aqmd Ventura, CAA$122,130paid202511829349301716
2024Imperial County Apcd El Centro, CAA$119,298paid202511829349301716
2024San Luis Obispo County Apcd Fresno, CAA$118,848paid202511829349301716
2024Eastern Kern Apcd Bakersfield, CAA$82,504paid202511829349301716
2024Butte County Aqmd Chico, CAA$73,594paid202511829349301716
2024Northern Sierra Aqmd Eureka, CAA$57,381paid202511829349301716
2024San Joaquin Valley Apcd San Diego, CAA$40,462paid202511829349301716
2024Mendocino County Aqmd Ukiah, CAA$33,000paid202511829349301716
2024Siskiyou County Apcd Davis, CAU$29,410paid202511829349301716
2024California Air Resources Board Sacramento, CAA$24,844paid202511829349301716
2024North Coast Unified Apcd Eureka, CAA$24,093paid202511829349301716
2024Shasta County Aqmd Santa Barbara, CAA$18,000paid202511829349301716
2024Lake County Aqmd Lakeport, CAA$14,740paid202511829349301716
2024Santa Barbara County Apcd San Luis Obispo, CAA$14,483paid202511829349301716
2024Siskiyou County Apcd Redding, CAA$13,202paid202511829349301716
2024Tehama County Apcd Yreka, CAA$12,957paid202511829349301716
2024San Diego County Apcd Sacramento, CAU$12,606paid202511829349301716
2024Antelope Valley Aqmd Lancaster, CAA$12,000paid202511829349301716
2024Sacramento Metropolitan Aqmd Auburn, CAA$6,334paid202511829349301716
2023Russel Sigler Inc Sacramento, CAA$247,043paidAGENCY GRANT202441919349300434
2023Great Basin Unified Apcd Bishop, CAA$157,300paidAGENCY GRANT202441919349300434
2023San Luis Obispo County Apcd San Luis Obispo, CAA$134,812paidAGENCY GRANT202441919349300434
2023Smarter Hepa Heber City, UTU$132,303paidAGENCY GRANT202441919349300434
2023Mojave Desert Aqmd Victorville, CAA$116,871paidAGENCY GRANT202441919349300434
2023Placer County Apcd Auburn, CAA$109,904paidAGENCY GRANT202441919349300434
2023Imperial County Apcd El Centro, CAA$105,130paidAGENCY GRANT202441919349300434
2023Yolo-Solano Aqmd Davis, CAA$89,855paidAGENCY GRANT202441919349300434
2023Northern Sierra Aqmd Grass Valley, CAA$76,855paidAGENCY GRANT202441919349300434
2023Eastern Kern Apcd Bakersfield, CAA$73,941paidAGENCY GRANT202441919349300434
2023Bay Area Aqmd San Francisco, CAA$72,222paidAGENCY GRANT202441919349300434
2023Butte County Aqmd Chico, CAA$67,825paidAGENCY GRANT202441919349300434
2023Genesis Air Inc Andrews, TXA$65,884paidAGENCY GRANT202441919349300434
2023Mendocino County Aqmd Ukiah, CAA$61,518paidAGENCY GRANT202441919349300434
2023San Joaquin Valley Apcd Fresno, CAA$47,644paidAGENCY GRANT202441919349300434
2023Lake County Aqmd Lakeport, CAA$33,590paidAGENCY GRANT202441919349300434
2023Siskiyou County Apcd Yreka, CAA$24,370paidAGENCY GRANT202441919349300434
2023Santa Barbara County Apcd Santa Barbara, CAA$21,843paidAGENCY GRANT202441919349300434
2023North Coast Unified Aqmd Eureka, CAA$17,278paidAGENCY GRANT202441919349300434
2023Antelope Valley Aqmd Lancaster, CAA$16,850paidAGENCY GRANT202441919349300434
2023Sacramento Metropolitan Aqmd Sacramento, CAA$16,215paidAGENCY GRANT202441919349300434
2023El Dorado County Aqmd Placerville, CAU$15,134paidAGENCY GRANT202441919349300434
2023Shasta County Aqmd Redding, CAA$14,000paidAGENCY GRANT202441919349300434
2023US Air Purifiers LLC Peoria, ILA$12,916paidAGENCY GRANT202441919349300434
2023Irobot Corporation Bedford, MAU$8,337paidAGENCY GRANT202441919349300434
2023Tehama County Apcd Red Bluff, CAA$8,000paidAGENCY GRANT202441919349300434
2023Alen Corporation Dallas, TXA$6,521paidAGENCY GRANT202441919349300434
2023Medify Air Boca Raton, FLA$5,579paidAGENCY GRANT202441919349300434
2022Imperial County Apcd El Centro, CAA$223,172paidAIR QUALITY MO202301919349301305
2022Mojave Desert Aqmd Victorville, CAA$211,108paidAIR QUALITY MO202301919349301305
2022San Luis Obispo County Apcd San Luis Obispo, CAA$201,801paidAIR QUALITY MO202301919349301305
2022Northern Sierra Aqmd Grass Valley, CAA$188,113paidAIR QUALITY MO202301919349301305
2022Yolo-Solano Aqmd Davis, CAA$162,888paidAIR QUALITY MO202301919349301305
2022Placer County Apcd Auburn, CAA$147,194paidAIR QUALITY MO202301919349301305
2022Great Basin Unified Apcd Bishop, CAA$136,462paidAIR QUALITY MO202301919349301305
2022Lake County Aqmd Lakeport, CAA$122,988paidAIR QUALITY MO202301919349301305
2022Mendocino County Aqmd Ukiah, CAA$122,800paidAIR QUALITY MO202301919349301305
2022Eastern Kern County Apcd Bakersfield, CAA$70,437paidAIR QUALITY MO202301919349301305
2022Butte County Aqmd Chico, CAA$66,824paidAIR QUALITY MO202301919349301305
2022Antelope Valley Aqmd Lancaster, CAA$63,982paidAIR QUALITY MO202301919349301305
2022Siskiyou County Apcd Yreka, CAA$33,030paidAIR QUALITY MO202301919349301305
2022Santa Barbara County Apcd Santa Barbara, CAA$32,438paidAIR QUALITY MO202301919349301305
2022Tehama County Apcd Red Bluff, CAA$26,649paidAIR QUALITY MO202301919349301305
2022San Joaquin Valley Apcd Fresno, CAA$15,700paidAIR QUALITY MO202301919349301305
2022North Coast Unified Aqmd Eureka, CAA$11,100paidAIR QUALITY MO202301919349301305
2022Shasta County Aqmd Redding, CAA$7,100paidAIR QUALITY MO202301919349301305
2022Sacramento Metro Aqmd Sacramento, CAA$5,670paidAIR QUALITY MO202301919349301305
2021Great Basin Unified Apcd Bishop, CAA$170,374paidAIR QUALITY MO202231809349300243
2021San Luis Obispo County Apcd San Luis Obispo, CAA$132,554paidAIR QUALITY MO202231809349300243
2021Imperial County Apcd El Centro, CAA$130,342paidAIR QUALITY MO202231809349300243
2021Mojave Desert Aqmd Victorville, CAA$125,839paidAIR QUALITY MO202231809349300243
2021Northern Sierra Aqmd Grass Valley, CAA$103,000paidAIR QUALITY MO202231809349300243
2021Placer County Apcd Auburn, CAA$102,429paidAIR QUALITY MO202231809349300243
2021Yolo-Solano Aqmd Davis, CAA$93,890paidAIR QUALITY MO202231809349300243
2021Bay Area Aqmd San Francisco, CAA$71,700paidAIR QUALITY MO202231809349300243
2021Eastern Kern County Apcd Bakersfield, CAA$69,470paidAIR QUALITY MO202231809349300243
2021Butte County Aqmd Chico, CAA$59,651paidAIR QUALITY MO202231809349300243
2021Mendocino County Aqmd Ukiah, CAA$39,523paidAIR QUALITY MO202231809349300243
2021North Coast Unified Aqmd Eureka, CAA$32,418paidAIR QUALITY MO202231809349300243
2021San Joaquin Valley Apcd Fresno, CAA$30,366paidAIR QUALITY MO202231809349300243
2021Santa Barbara County Apcd Santa Barbara, CAA$18,830paidAIR QUALITY MO202231809349300243
2021Siskiyou County Apcd Yreka, CAA$15,000paidAIR QUALITY MO202231809349300243
2021Shasta County Aqmd Redding, CAA$10,600paidAIR QUALITY MO202231809349300243
2021Lake County Aqmd Lakeport, CAA$9,610paidAIR QUALITY MO202231809349300243
2020Yolo-Solano Aqmd Davis, CAA$209,523paidAIR QUALITY MO202132119349301568
2020Great Basin Unified Apcd Bishop, CAA$157,760paidAIR QUALITY MO202132119349301568
2020Placer County Apcd Auburn, CAA$138,434paidAIR QUALITY MO202132119349301568
2020San Luis Obispo County Apcd San Luis Obispo, CAA$119,651paidAIR QUALITY MO202132119349301568
2020Imperial County Apcd El Centro, CAA$114,802paidAIR QUALITY MO202132119349301568
2020San Joaquin Valley Apcd Fresno, CAA$103,906paidAIR QUALITY MO202132119349301568
2020Mojave Desert Aqmd Victorville, CAA$100,827paidAIR QUALITY MO202132119349301568
2020Butte County Aqmd Chico, CAA$72,580paidAIR QUALITY MO202132119349301568
2020Northern Sierra Aqmd Grass Valley, CAA$71,566paidAIR QUALITY MO202132119349301568
2020Eastern Kern County Apcd Bakersfield, CAA$70,909paidAIR QUALITY MO202132119349301568
2020Mendocino County Aqmd Ukiah, CAA$43,250paidAIR QUALITY MO202132119349301568
2020Bay Area Aqmd San Francisco, CAA$38,322paidAIR QUALITY MO202132119349301568
2020Santa Barbara County Apcd Santa Barbara, CAA$38,010paidAIR QUALITY MO202132119349301568
2020El Dorado County Aqmd Placerville, CAA$31,774paidAIR QUALITY MO202132119349301568
2020North Coast Unified Aqmd Eureka, CAA$26,925paidAIR QUALITY MO202132119349301568
2020Siskiyou County Apcd Yreka, CAA$22,475paidAIR QUALITY MO202132119349301568
2020Shasta County Aqmd Redding, CAA$20,348paidAIR QUALITY MO202132119349301568
2020Lake County Aqmd Lakeport, CAA$16,669paidAIR QUALITY MO202132119349301568
2020Monterey Bay Ard Monterey, CAA$15,372paidAIR QUALITY MO202132119349301568
2020Ventura County Apcd Ventura, CAA$12,708paidAIR QUALITY MO202132119349301568
2020Mariposa County Aqmd Mariposa, CAA$9,500paidAIR QUALITY MO202132119349301568
2020Tehama County Apcd Red Bluff, CAA$9,459paidAIR QUALITY MO202132119349301568
2020Sacramento Metro Aqmd Sacramento, CAA$8,130paidAIR QUALITY MO202132119349301568
2020Ca Air Resources Board Sacramento, CAA$7,409paidAIR QUALITY MO202132119349301568
2020Glenn County Apcd Willows, CAA$6,687paidAIR QUALITY MO202132119349301568
2019Mendocino County Aqmd Ukiah, CAA$160,684paidAIR QUALITY MO202032119349301258
2019Monterey Bay Ard Monterey, CAA$157,500paidAIR QUALITY MO202032119349301258
2019San Luis Obispo County Apcd San Luis Obispo, CAA$147,022paidAIR QUALITY MO202032119349301258
2019Imperial County Apcd El Centro, CAA$137,932paidAIR QUALITY MO202032119349301258
2019Great Basin Unified Apcd Bishop, CAA$132,121paidAIR QUALITY MO202032119349301258
2019Mojave Desert Aqmd Victorville, CAA$128,661paidAIR QUALITY MO202032119349301258
2019Lake County Aqmd Lakeport, CAA$106,567paidAIR QUALITY MO202032119349301258
2019Yolo-Solano Aqmd Davis, CAA$91,373paidAIR QUALITY MO202032119349301258
2019Mariposa County Aqmd Mariposa, CAA$90,000paidAIR QUALITY MO202032119349301258
2019El Dorado County Aqmd Placerville, CAA$80,156paidAIR QUALITY MO202032119349301258
2019Placer County Apcd Auburn, CAA$78,169paidAIR QUALITY MO202032119349301258
2019North Coast Unified Aqmd Eureka, CAA$74,198paidAIR QUALITY MO202032119349301258
2019Eastern Kern County Apcd Bakersfield, CAA$69,580paidAIR QUALITY MO202032119349301258
2019Northern Sierra Aqmd Grass Valley, CAA$57,433paidAIR QUALITY MO202032119349301258
2019Butte County Aqmd Chico, CAA$44,546paidAIR QUALITY MO202032119349301258
2019Siskiyou County Apcd Yreka, CAA$30,964paidAIR QUALITY MO202032119349301258
2019Shasta County Aqmd Redding, CAA$20,533paidAIR QUALITY MO202032119349301258
2019South Coast Aqmd Diamond Bar, CAA$12,870paidAIR QUALITY MO202032119349301258
2019San Joaquin Valley Apcd Fresno, CAA$7,416paidAIR QUALITY MO202032119349301258
2019Santa Barbara County Apcd Santa Barbara, CAA$6,612paidAIR QUALITY MO202032119349301258
2019Tehama County Apcd Red Bluff, CAA$5,925paidAIR QUALITY MO202032119349301258
2019Ventura County Apcd Ventura, CAA$5,286paidAIR QUALITY MO202032119349301258
2018Northern Sierra Aqmd Grass Valley, CAA$451,500paidAIR QUALITY MO201932209349300923
2018El Dorado County Aqmd Placerville, CAA$450,000paidAIR QUALITY MO201932209349300923
2018Butte County Aqmd Chico, CAA$428,672paidAIR QUALITY MO201932209349300923
2018Great Basin Unified Apcd Bishop, CAA$320,334paidAIR QUALITY MO201932209349300923
2018North Coast Unified Aqmd Eureka, CAA$291,400paidAIR QUALITY MO201932209349300923
2018San Luis Obispo County Apcd San Luis Obispo, CAA$255,168paidAIR QUALITY MO201932209349300923
2018Santa Barbara County Apcd Santa Barbara, CAA$226,950paidAIR QUALITY MO201932209349300923
2018Monterey Bay Ard Monterey, CAA$225,750paidAIR QUALITY MO201932209349300923
2018Feather River Aqmd Yuba City, CAA$192,662paidAIR QUALITY MO201932209349300923
2018Tehama County Apcd Red Bluff, CAA$190,528paidAIR QUALITY MO201932209349300923
2018Shasta County Aqmd Redding, CAA$187,100paidAIR QUALITY MO201932209349300923
2018Glenn County Apcd Willows, CAA$180,000paidAIR QUALITY MO201932209349300923
2018Eastern Kern County Apcd Bakersfield, CAA$160,853paidAIR QUALITY MO201932209349300923
2018Lake County Aqmd Lakeport, CAA$157,721paidAIR QUALITY MO201932209349300923
2018Mojave Desert Aqmd Victorville, CAA$145,967paidAIR QUALITY MO201932209349300923
2018Imperial County Apcd El Centro, CAA$136,708paidAIR QUALITY MO201932209349300923
2018Lassen County Apcd Susanville, CAA$135,000paidAIR QUALITY MO201932209349300923
2018Tuolumne County Apcd Sonora, CAA$135,000paidAIR QUALITY MO201932209349300923
2018Colusa County Apcd Colusa, CAA$112,500paidAIR QUALITY MO201932209349300923
2018Yolo-Solano Aqmd Davis, CAA$91,614paidAIR QUALITY MO201932209349300923
2018Calaveras County Apcd San Andreas, CAA$90,000paidAIR QUALITY MO201932209349300923
2018Siskiyou County Apcd Yreka, CAA$81,450paidAIR QUALITY MO201932209349300923
2018Placer County Apcd Auburn, CAA$73,892paidAIR QUALITY MO201932209349300923
2018Mendocino County Aqmd Ukiah, CAA$13,200paidAIR QUALITY MO201932209349300923
2018South Coast Aqmd Diamond Bar, CAA$12,779paidAIR QUALITY MO201932209349300923
2018San Joaquin Valley Apcd Fresno, CAA$10,688paidAIR QUALITY MO201932209349300923

Match tier: A Reported EIN · B Exact name and place · C Strong name match · D Probable name match · U Unresolved. Tiers C and D are inferred, not reported; see how matching works.

Recipient matching for this dataset version has not yet completed its independent precision check. Tier A rows carry the EIN the filer reported; tiers B–D are the matcher's inference and should be read as leads until the check is published on the methodology page.

Source filings

Every figure above is traceable to one of these IRS e-file returns by its OBJECT_ID.

Returns this page is derived from
FormTax yearPeriod endFiledSchemaIRS OBJECT_ID
99020252025-09-30not stated2024v5.0202621769349301007
99020242024-09-30not stated2023v6.0202511829349301716
99020232023-09-30not stated2022v5.0202441919349300434
99020222022-09-30not stated2021v4.1202301919349301305
99020212021-09-30not stated2020v4.0202231809349300243
99020202020-09-30not stated2019v5.0202132119349301568
99020192019-09-30not stated2018v3.1202032119349301258
99020182018-09-30not stated2017v2.2201932209349300923

Derived from IRS Form 990 e-file XML; recipient identities from the IRS Exempt Organizations Business Master File. Dataset version 2026.09.0, built 2026-09-03. The same rows as Parquet: manifest; as JSON: /api/funders/770058264.json.

The same organization elsewhere in the program: exempt status and filing health · federal awards · grant guidance · open opportunities.

This is informational only, derived from public data on the dates shown. It is not an eligibility determination, and not legal, tax, or accounting advice. Verify against the official source before relying on it.