--- title: "Clean Truck Check Testers in Atwater, CA (5 listed)" description: "Find 5 CARB-credentialed Clean Truck Check testers in Atwater, Merced County: 5 offer mobile testing, 0 do smoke opacity tests. Phone numbers, services and…" url: "https://ctcfinder.com/testers/merced-county/atwater/" updated: "2026-11-01" publisher: "CTC Finder (independent directory, not affiliated with CARB)" --- # Clean Truck Check testers in Atwater, CA 5 testing businesses in Atwater (Merced County) are on CARB's public Clean Truck Check tester list (5 credentialed testers). 5 offer mobile testing, 0 do smoke opacity tests, 3 test motorhomes. > CTC Finder is an independent directory, not affiliated with CARB. Tester data: CARB Clean Truck Check public tester list, last checked November 1, 2026. Confirm services, hours and prices with the tester. ## Testers in Atwater - **[Cen-Cal Truck Check](https://ctcfinder.com/tester/cen-cal-truck-check-atwater/)** — 3292 Mariner Ct, Atwater, CA 95301 — (209) 628-3882. Services: mobile testing, OBD testing, motorhome testing. - **[Israel Vargas](https://ctcfinder.com/tester/israel-vargas-atwater/)** — Atwater, CA 95301 — (209) 321-8975. Services: mobile testing, OBD testing, motorhome testing. - **[Mario Alejandro Garcia Tester](https://ctcfinder.com/tester/mario-alejandro-garcia-tester-atwater/)** — 2385 Redwood Ave, Atwater, CA 95301 — (209) 263-2529. Services: mobile testing, OBD testing. - **[Monster Equipment](https://ctcfinder.com/tester/monster-equipment-atwater/)** — 554 E Bellevue Rd, Atwater, CA 95301 — (209) 605-8707. Services: mobile testing, OBD testing, motorhome testing. - **[Rafael Orozco](https://ctcfinder.com/tester/rafael-orozco-atwater/)** — Atwater, CA 95301 — (209) 600-9941. Services: mobile testing, OBD testing. ## More testers within 20 miles - **[Gurpreet Atwal](https://ctcfinder.com/tester/gurpreet-atwal-livingston/)** — Livingston, CA 95334 — (209) 913-9160 — 6 mi. Services: mobile testing, OBD testing. - **[Harpreet Singh Jolly](https://ctcfinder.com/tester/harpreet-singh-jolly-livingston/)** — Livingston, CA 95334 — (559) 999-2732 — 6 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Jorge De La Rosa](https://ctcfinder.com/tester/jorge-de-la-rosa-livingston/)** — Livingston, CA 95334 — (209) 850-1232 — 6 mi. Services: mobile testing, OBD testing. - **[Dan's CTC](https://ctcfinder.com/tester/dans-ctc-winton/)** — 6760 California St, Winton, CA 95388 — (209) 564-1633 — 9 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Taylor's](https://ctcfinder.com/tester/taylors-winton/)** — 6171 N Winton Way, Winton, CA 95388 — (209) 261-1048 — 9 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Alden Hansard](https://ctcfinder.com/tester/alden-hansard-merced/)** — Merced, CA 95341 — (209) 777-3842 — 10 mi. Services: mobile testing, OBD testing. - **[Best Electric](https://ctcfinder.com/tester/best-electric-merced/)** — 2160 Wardrobe Ave, Merced, CA 95341 — (209) 600-5568 — 10 mi. Services: mobile testing, OBD testing. - **[David Biorato](https://ctcfinder.com/tester/david-biorato-merced/)** — Merced, CA 95341 — (350) 204-9765 — 10 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Luis Nunez Rivas](https://ctcfinder.com/tester/luis-nunez-rivas-merced/)** — Merced, CA 95341 — (510) 965-3973 — 10 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Miguel Garcia-Villanueva](https://ctcfinder.com/tester/miguel-garcia-villanueva-merced/)** — Merced, CA 95341 — (209) 355-6459 — 10 mi. Services: mobile testing, OBD testing. - **[N&S Tractor Merced](https://ctcfinder.com/tester/n-and-s-tractor-merced-merced/)** — 600 State Rte 59, Merced, CA 95341 — (209) 325-5169 — 10 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Hargreaves Ranches LLC](https://ctcfinder.com/tester/hargreaves-ranches-llc-delhi/)** — 17736 Swanson Rd, Delhi, CA 95315 — (209) 988-7214 — 10 mi. Services: mobile testing, OBD testing. ## Cost Typical published prices in California: OBD test $50–$135 per vehicle; smoke opacity test $190–$200. Prices are set by each tester. ## Frequently asked questions ### How many Clean Truck Check testers are in Atwater? CTC Finder lists 5 testing businesses in Atwater from CARB's public tester list (5 credentialed testers), last checked November 1, 2026. Listing on CARB's list is optional, so the real number can be higher. ### Is there mobile Clean Truck Check testing in Atwater? Yes. 5 listed businesses in Atwater offer mobile testing, which means the tester comes to your yard. Use the Mobile filter above to see them. ### How much does a Clean Truck Check test cost in Atwater? Testers set their own prices. Published prices for an OBD test are usually $50–$135 per vehicle; smoke opacity tests for older trucks often cost more, and mobile testers may add a trip fee. See the [cost guide](https://ctcfinder.com/guide/cost/). ### How often does my truck need a Clean Truck Check test? Most trucks test twice a year, on a schedule tied to the DMV registration expiration date. CARB says OBD trucks move to four tests a year beginning October 2027. California-registered (non-commercial) motorhomes and agricultural vehicles test once a year. See the [deadline guide](https://ctcfinder.com/guide/deadlines-2026-2027/). ## Nearby cities - [Livingston](https://ctcfinder.com/testers/merced-county/livingston/) — 3 listings, 6 mi - [Merced](https://ctcfinder.com/testers/merced-county/merced/) — 13 listings, 10 mi - [Denair](https://ctcfinder.com/testers/stanislaus-county/denair/) — 4 listings, 16 mi - [Turlock](https://ctcfinder.com/testers/stanislaus-county/turlock/) — 7 listings, 17 mi - [Dos Palos](https://ctcfinder.com/testers/merced-county/dos-palos/) — 4 listings, 18 mi - [Los Banos](https://ctcfinder.com/testers/merced-county/los-banos/) — 8 listings, 23 mi - [Ceres](https://ctcfinder.com/testers/stanislaus-county/ceres/) — 7 listings, 24 mi - [Modesto](https://ctcfinder.com/testers/stanislaus-county/modesto/) — 23 listings, 31 mi - [Oakdale](https://ctcfinder.com/testers/stanislaus-county/oakdale/) — 5 listings, 34 mi