{"attribution":"California ERC Exchange (calercexchange.com), compiled from district registers and recorded transactions; cite the source of each figure.","generated":"2026-10-06","districts":[{"key":"YSAQMD","name":"Yolo-Solano AQMD","slug":"yolo-solano-aqmd","url":"https://calercexchange.com/districts/yolo-solano-aqmd/","phone":"(530) 757-3673","register":{"status":"mirrored in full","edition":"District ERC Registry, May 19, 2025","retrieved":"2026-10-03","checked":"2026-10-05","source":"https://www.ysaqmd.org/permits/emission-reduction-credits/","certificates":137,"holders":49,"bankedTpy":{"CO":2125.397,"VOC":184.22,"NOx":222.502,"SOx":72.405,"PM10":503.237},"bankedNote":"tons per year; lb/day × 365 ÷ 2,000, lb/qtr × 4 ÷ 2,000, lb/yr ÷ 2,000; PM2.5 and non-criteria credits excluded"}},{"key":"FRAQMD","name":"Feather River AQMD","slug":"feather-river-aqmd","url":"https://calercexchange.com/districts/feather-river-aqmd/","phone":"(530) 634-7659","register":{"status":"mirrored in full","edition":"District ERC Register workbook (fraqmd.org), active certificates","retrieved":"2026-10-02","checked":"2026-10-05","source":"https://www.fraqmd.org/emission-reduction-credits-ercs-district-registry","certificates":133,"holders":72,"bankedTpy":{"VOC":330.771,"NOx":247.612,"SOx":76.491,"PM10":313.303,"CO":3456.344},"bankedNote":"tons per year; lb/day × 365 ÷ 2,000, lb/qtr × 4 ÷ 2,000, lb/yr ÷ 2,000; PM2.5 and non-criteria credits excluded"}},{"key":"SMAQMD","name":"Sacramento Metro AQMD","slug":"sacramento-metro-aqmd","url":"https://calercexchange.com/districts/sacramento-metro-aqmd/","phone":"(279) 207-1122","register":{"status":"mirrored in full","edition":"Current ERC Certificate Holders report dated 18-Sep-26","retrieved":"2026-10-02","checked":null,"source":"https://www.airquality.org/businesses/permits-registration-programs/new-source-review-(nsr)/emission-reduction-credits-program-(erc)","certificates":203,"holders":32,"bankedTpy":{"VOC":302.528,"NOx":422.84,"CO":290.025,"SOx":55.628,"PM10":22.228},"bankedNote":"tons per year; lb/day × 365 ÷ 2,000, lb/qtr × 4 ÷ 2,000, lb/yr ÷ 2,000; PM2.5 and non-criteria credits excluded"}},{"key":"SJVAPCD","name":"San Joaquin Valley APCD","slug":"san-joaquin-valley-apcd","url":"https://calercexchange.com/districts/san-joaquin-valley-apcd/","phone":"(559) 230-6000","register":{"status":"mirrored in full","edition":"Available Emission Reduction Credits, district reports of 2026-10-03","retrieved":"2026-10-03","checked":"2026-10-05","source":"https://ww2.valleyair.org/permitting/emission-reduction-credits-erc/emission-reduction-credits-registry/","certificates":2305,"holders":411,"bankedTpy":{"PM10":1319.834,"CO":27031.381,"VOC":4901.781,"SOx":3057.64,"NOx":5114.314},"bankedNote":"tons per year; lb/day × 365 ÷ 2,000, lb/qtr × 4 ÷ 2,000, lb/yr ÷ 2,000; PM2.5 and non-criteria credits excluded"}},{"key":"BCAQMD","name":"Butte County AQMD","slug":"butte-county-aqmd","url":"https://calercexchange.com/districts/butte-county-aqmd/","phone":"(530) 332-9400","register":{"status":"mirrored in full","edition":"District ERC Registry, August 2025","retrieved":"2026-10-03","checked":"2026-10-05","source":"https://www.bcaqmd.org/emission-reduction-credits-ercs","certificates":30,"holders":11,"bankedTpy":{"NOx":178.937,"CO":1840.335,"PM10":154.026,"SOx":30.654,"VOC":85.647},"bankedNote":"tons per year; lb/day × 365 ÷ 2,000, lb/qtr × 4 ÷ 2,000, lb/yr ÷ 2,000; PM2.5 and non-criteria credits excluded"}},{"key":"MBARD","name":"Monterey Bay ARD","slug":"monterey-bay-ard","url":"https://calercexchange.com/districts/monterey-bay-ard/","phone":"(831) 647-9411","register":{"status":"mirrored in full","edition":"Active ERC Registry (Summary of Emission Banking Transactions) as of October 5, 2026; Community Bank ERCs as of October 5, 2026","retrieved":"2026-10-03","checked":"2026-10-06","source":"https://www.mbard.org/emission-reduction-credits","certificates":17,"holders":17,"bankedTpy":{"NOx":1100.53,"SOx":742.251,"VOC":103.157,"CO":5166.966,"PM10":297.141},"bankedNote":"tons per year; lb/day × 365 ÷ 2,000, lb/qtr × 4 ÷ 2,000, lb/yr ÷ 2,000; PM2.5 and non-criteria credits excluded"}},{"key":"SDAPCD","name":"San Diego County APCD","slug":"san-diego-county-apcd","url":"https://calercexchange.com/districts/san-diego-county-apcd/","phone":"(858) 586-2600","register":{"status":"mirrored in full","edition":"ERC Banking Registry, Class A active ERCs, last update August 12, 2025; MERC Banking Registry, last update May 18, 2023","retrieved":"2026-10-03","checked":"2026-10-05","source":"https://www.sdapcd.org/content/sdapcd/permits/erc.html","certificates":185,"holders":48,"bankedTpy":{"CO":677.19,"PM10":185.474,"NOx":249.61,"VOC":274.661,"SOx":16.03},"bankedNote":"tons per year; lb/day × 365 ÷ 2,000, lb/qtr × 4 ÷ 2,000, lb/yr ÷ 2,000; PM2.5 and non-criteria credits excluded"}},{"key":"SBCAPCD","name":"Santa Barbara County APCD","slug":"santa-barbara-county-apcd","url":"https://calercexchange.com/districts/santa-barbara-county-apcd/","phone":"(805) 979-8050","register":{"status":"mirrored in full","edition":"Active ERC certificates, run date Sept. 22, 2026","retrieved":"2026-10-03","checked":"2026-10-05","source":"https://www.ourair.org/erc/","certificates":100,"holders":24,"bankedTpy":{"NOx":281.616,"SOx":209.199,"VOC":142.498,"CO":197.05,"PM10":44.397},"bankedNote":"tons per year; lb/day × 365 ÷ 2,000, lb/qtr × 4 ÷ 2,000, lb/yr ÷ 2,000; PM2.5 and non-criteria credits excluded"}},{"key":"VCAPCD","name":"Ventura County APCD","slug":"ventura-county-apcd","url":"https://calercexchange.com/districts/ventura-county-apcd/","phone":"(805) 303-4005","register":{"status":"mirrored in full","edition":"ERC Certificates by Company report dated Monday, July 20, 2026","retrieved":"2026-10-03","checked":"2026-10-05","source":"https://www.vcapcd.org/offset-reduction-credits-reports/","certificates":166,"holders":58,"bankedTpy":{"NOx":271.8,"PM10":49.49,"SOx":3.42,"VOC":573.16},"bankedNote":"tons per year; lb/day × 365 ÷ 2,000, lb/qtr × 4 ÷ 2,000, lb/yr ÷ 2,000; PM2.5 and non-criteria credits excluded"}},{"key":"MDAQMD","name":"Mojave Desert AQMD","slug":"mojave-desert-aqmd","url":"https://calercexchange.com/districts/mojave-desert-aqmd/","phone":"(760) 245-1661","register":{"status":"mirrored in full","edition":"District-Wide ERC Summary dated September 15, 2026","retrieved":"2026-10-03","checked":null,"source":"https://www.mdaqmd.ca.gov/permitting/emission-reduction-credits","certificates":39,"holders":25,"bankedTpy":{"NOx":2416.757,"PM10":256.218,"VOC":76.826,"CO":718.818,"SOx":244.38},"bankedNote":"tons per year; lb/day × 365 ÷ 2,000, lb/qtr × 4 ÷ 2,000, lb/yr ÷ 2,000; PM2.5 and non-criteria credits excluded"}},{"key":"SCAQMD","name":"South Coast AQMD","slug":"south-coast-aqmd","url":"https://calercexchange.com/districts/south-coast-aqmd/","phone":"(909) 396-2000","register":{"status":"mirrored in full","edition":"ERC & STERC Active List, July 2026","retrieved":"2026-10-02","checked":"2026-10-05","source":"https://www.aqmd.gov/home/permits/emission-reduction-credits/active-erc-and-sterc-lists","certificates":760,"holders":358,"bankedTpy":{"NOx":126.29,"SOx":139.795,"VOC":1386.452,"PM10":114.61,"CO":430.7},"bankedNote":"tons per year; lb/day × 365 ÷ 2,000, lb/qtr × 4 ÷ 2,000, lb/yr ÷ 2,000; PM2.5 and non-criteria credits excluded"}},{"key":"AVAQMD","name":"Antelope Valley AQMD","slug":"antelope-valley-aqmd","url":"https://calercexchange.com/districts/antelope-valley-aqmd/","phone":"(661) 723-8070","register":{"status":"mirrored in full","edition":"ERC Registry, updated 5/20/2025","retrieved":"2026-10-03","checked":"2026-10-05","source":"https://www.avaqmd.ca.gov/emission-reduction-credits","certificates":12,"holders":4,"bankedTpy":{"NOx":19.76,"VOC":65.192,"CO":4.496,"SOx":0.004},"bankedNote":"tons per year; lb/day × 365 ÷ 2,000, lb/qtr × 4 ÷ 2,000, lb/yr ÷ 2,000; PM2.5 and non-criteria credits excluded"}},{"key":"BAAQMD","name":"Bay Area AQMD","slug":"bay-area-aqmd","url":"https://calercexchange.com/districts/bay-area-aqmd/","phone":"(415) 749-5000","register":{"status":"mirrored in full","edition":"ERC Bank Status database (baaqmd.gov), retrieved 2026-10-03","retrieved":"2026-10-03","checked":"2026-10-05","source":"https://www.baaqmd.gov/permits/emissions-banking/bank-status","certificates":425,"holders":161,"bankedTpy":{"NOx":2082.372,"SOx":7156.63,"CO":3133.028,"PM10":539.823,"VOC":1974.474},"bankedNote":"tons per year; lb/day × 365 ÷ 2,000, lb/qtr × 4 ÷ 2,000, lb/yr ÷ 2,000; PM2.5 and non-criteria credits excluded"}},{"key":null,"name":"Placer County APCD","slug":"placer-county-apcd","url":"https://calercexchange.com/districts/placer-county-apcd/","phone":"(530) 745-2330","register":{"status":"no published register"}},{"key":null,"name":"El Dorado County AQMD","slug":"el-dorado-county-aqmd","url":"https://calercexchange.com/districts/el-dorado-county-aqmd/","phone":"(530) 621-7501","register":{"status":"no published register"}},{"key":"EKAPCD","name":"Eastern Kern APCD","slug":"eastern-kern-apcd","url":"https://calercexchange.com/districts/eastern-kern-apcd/","phone":"(661) 862-5250","register":{"status":"mirrored in full","edition":"Banking Certificate Registry, reviewed Aug 25, 2026","retrieved":"2026-10-03","checked":"2026-10-05","source":"http://www.kernair.org/Main_Pages/Subpages/Info_Sub/ERC%20Registry.html","certificates":52,"holders":14,"bankedTpy":{"PM10":682.507,"NOx":160.501,"VOC":16.897,"CO":131.387,"SOx":1.052},"bankedNote":"tons per year; lb/day × 365 ÷ 2,000, lb/qtr × 4 ÷ 2,000, lb/yr ÷ 2,000; PM2.5 and non-criteria credits excluded"}},{"key":"ICAPCD","name":"Imperial County APCD","slug":"imperial-county-apcd","url":"https://calercexchange.com/districts/imperial-county-apcd/","phone":"(442) 265-1800","register":{"status":"mirrored in full","edition":"Certificates Bank, Aug 25, 2026 (records-request response)","retrieved":"2026-08-25","checked":null,"source":"https://apcd.imperialcounty.org/","certificates":328,"holders":37,"bankedTpy":{"CO":4955.56,"VOC":360.15,"NOx":127.92,"PM10":69.85},"bankedNote":"tons per year; lb/day × 365 ÷ 2,000, lb/qtr × 4 ÷ 2,000, lb/yr ÷ 2,000; PM2.5 and non-criteria credits excluded"}},{"key":null,"name":"San Luis Obispo County APCD","slug":"san-luis-obispo-county-apcd","url":"https://calercexchange.com/districts/san-luis-obispo-county-apcd/","phone":"(805) 781-5912","register":{"status":"no published register"}},{"key":null,"name":"Colusa County APCD","slug":"colusa-county-apcd","url":"https://calercexchange.com/districts/colusa-county-apcd/","phone":"(530) 458-0590","register":{"status":"no published register"}},{"key":null,"name":"Glenn County APCD","slug":"glenn-county-apcd","url":"https://calercexchange.com/districts/glenn-county-apcd/","phone":"(530) 934-6500","register":{"status":"no published register"}},{"key":"TCAPCD","name":"Tehama County APCD","slug":"tehama-county-apcd","url":"https://calercexchange.com/districts/tehama-county-apcd/","phone":"(530) 527-3717","register":{"status":"mirrored in full","edition":"District ERC Bank log, Nov 24, 2025 (records-request response)","retrieved":"2026-08-27","checked":null,"source":"https://www.tehcoapcd.net/","certificates":24,"holders":14,"bankedTpy":{"NOx":234.736,"VOC":376.019,"PM10":221.507,"SOx":219.383,"CO":920.193},"bankedNote":"tons per year; lb/day × 365 ÷ 2,000, lb/qtr × 4 ÷ 2,000, lb/yr ÷ 2,000; PM2.5 and non-criteria credits excluded"}},{"key":null,"name":"Shasta County AQMD","slug":"shasta-county-aqmd","url":"https://calercexchange.com/districts/shasta-county-aqmd/","phone":"(530) 225-5674","register":{"status":"no published register"}},{"key":null,"name":"Northern Sierra AQMD","slug":"northern-sierra-aqmd","url":"https://calercexchange.com/districts/northern-sierra-aqmd/","phone":"(530) 274-9360","register":{"status":"district confirms no banked credits"}},{"key":null,"name":"Amador County APCD","slug":"amador-county-apcd","url":"https://calercexchange.com/districts/amador-county-apcd/","phone":"(209) 257-0112","register":{"status":"district confirms no banked credits"}},{"key":null,"name":"Calaveras County APCD","slug":"calaveras-county-apcd","url":"https://calercexchange.com/districts/calaveras-county-apcd/","phone":"(209) 754-6399","register":{"status":"no published register"}},{"key":null,"name":"Tuolumne County APCD","slug":"tuolumne-county-apcd","url":"https://calercexchange.com/districts/tuolumne-county-apcd/","phone":"(209) 533-5693","register":{"status":"district confirms no banked credits"}},{"key":null,"name":"Mariposa County APCD","slug":"mariposa-county-apcd","url":"https://calercexchange.com/districts/mariposa-county-apcd/","phone":"(209) 966-2220","register":{"status":"no published register"}},{"key":null,"name":"Great Basin Unified APCD","slug":"great-basin-unified-apcd","url":"https://calercexchange.com/districts/great-basin-unified-apcd/","phone":"(760) 872-8211","register":{"status":"district confirms no banked credits"}},{"key":null,"name":"Lake County AQMD","slug":"lake-county-aqmd","url":"https://calercexchange.com/districts/lake-county-aqmd/","phone":"(707) 263-7000","register":{"status":"district confirms no banked credits"}},{"key":null,"name":"Lassen County APCD","slug":"lassen-county-apcd","url":"https://calercexchange.com/districts/lassen-county-apcd/","phone":"(530) 252-4247","register":{"status":"no published register"}},{"key":null,"name":"Mendocino County AQMD","slug":"mendocino-county-aqmd","url":"https://calercexchange.com/districts/mendocino-county-aqmd/","phone":"(707) 463-4354","register":{"status":"district confirms no banked credits"}},{"key":null,"name":"Modoc County APCD","slug":"modoc-county-apcd","url":"https://calercexchange.com/districts/modoc-county-apcd/","phone":"(530) 233-6401","register":{"status":"no published register"}},{"key":"NCUAQMD","name":"North Coast Unified AQMD","slug":"north-coast-unified-aqmd","url":"https://calercexchange.com/districts/north-coast-unified-aqmd/","phone":"(707) 443-3093","register":{"status":"mirrored in full","edition":"ERC Banking Register, Active Registry (last revised Jan 5, 2016; printed Nov 22, 2022)","retrieved":"2026-08-31","checked":null,"source":"https://www.ncuaqmd.org/","certificates":4,"holders":4,"bankedTpy":{"NOx":899.39,"PM10":156.28,"VOC":166.3,"CO":313.53,"SOx":54.08},"bankedNote":"tons per year; lb/day × 365 ÷ 2,000, lb/qtr × 4 ÷ 2,000, lb/yr ÷ 2,000; PM2.5 and non-criteria credits excluded"}},{"key":null,"name":"Northern Sonoma County APCD","slug":"northern-sonoma-county-apcd","url":"https://calercexchange.com/districts/northern-sonoma-county-apcd/","phone":"(707) 433-5911","register":{"status":"district confirms no banked credits"}},{"key":null,"name":"Siskiyou County APCD","slug":"siskiyou-county-apcd","url":"https://calercexchange.com/districts/siskiyou-county-apcd/","phone":"(530) 841-4025","register":{"status":"no published register"}}]}