Yes. Start with the EPA’s list of state laboratory certification programs here https://www.epa.gov/system/files/documents/2023-03/state-cert-programs-certify-la

Yes. Start with the EPA’s list of state laboratory certification programs here https://www.epa.gov/system/files/documents/2023-03/state-cert-programs-certify-labs-to-conduct-drinking-water-analyses.pdf https://www.epa.gov/system/files/documents/2023-03/state-cer... then find a lab from the list for your state. Then you generally just mail them a sample using their kit.