{"query":{"parameter":"trihalomethanes","place":"US-MD","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-MD","US"],"parameter_keys":["name:trihalomethanes","name:total trihalomethanes","name:total trihalomethanes (tthm) (the sum of bromodichloro-methane, dibromochloro- methane, bromoform (tribromomethane) and chloroform (trichloromethane))","name:trihalomethanes total","name:trihalomethanes, total","name:trihalomethanes (total)","name:trihalomethanes totaux","name:tthm (sum of total trihalomethanes) ---"],"names_matched":[["trihalomethanes","name:trihalomethanes"],["total trihalomethanes","name:total trihalomethanes"],["total trihalomethanes bromoform chlorodibromomethane dichlorobromomethane and chloroform","name:total trihalomethanes"],["total trihalomethanes hms","name:total trihalomethanes"],["total trihalomethanes tthm","name:total trihalomethanes"],["total trihalomethanes tthm the sum of bromodichloro methane dibromochloro methane bromoform tribromomethane and chloroform trichloromethane","name:total trihalomethanes (tthm) (the sum of bromodichloro-methane, dibromochloro- methane, bromoform (tribromomethane) and chloroform (trichloromethane))"],["total trihalomethanes tthms","name:total trihalomethanes"],["trihalomethanes total","name:trihalomethanes total"],["trihalomethanes total","name:trihalomethanes, total"],["trihalomethanes total c","name:trihalomethanes (total)"],["trihalomethanes totaux","name:trihalomethanes totaux"],["trihalomethanes totaux chloroforme bromodichloromethane chlorodibromomethane et bromoforme","name:trihalomethanes totaux"],["tthm sum of total trihalomethanes","name:tthm (sum of total trihalomethanes) ---"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order"},"total":3,"offset":0,"returned":3,"next_offset":null,"rows":[{"id":"878ad923e1b8eaec","parameter":"Trihalomethanes","value":"80","value_num":80,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:trihalomethanes","place":["US-MD"],"conditions":["human health for consumption of drinking water + organism (the table's column)"],"cite":{"instrument":"us_md_wqs","title":"COMAR 26.08.02.03-2 — Numerical Criteria for Toxic Substances in Surface Waters (Maryland), Tables 1, 4, 5 and 6","issuer":"State of Maryland, Department of the Environment (MDE)","edition":"Code of Maryland Regulations as served by the Division of State Documents on 2026-10-09","source_url":"https://dsd.maryland.gov/regulations/Pages/26.08.02.03-2.aspx","source_sha256":"9924bc5fb2d109930b06f840cd56b722bdab36dfe897e28897e658512be1f9bd","fetched_at":"2026-10-09","section":"COMAR 26.08.02.03-2 G, Table 4 (human health, drinking water + organism)","page":null,"quote":"Trihalomethanes 1 80 0.08"}},{"id":"c4c5cc765fefba3a","parameter":"Trihalomethanes","value":"0.08","value_num":0.08,"unit":"mg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:trihalomethanes","place":["US-MD"],"conditions":["Public Water Supply designated waters only (the table's * note)"],"cite":{"instrument":"us_md_wqs","title":"COMAR 26.08.02.03-2 — Numerical Criteria for Toxic Substances in Surface Waters (Maryland), Tables 1, 4, 5 and 6","issuer":"State of Maryland, Department of the Environment (MDE)","edition":"Code of Maryland Regulations as served by the Division of State Documents on 2026-10-09","source_url":"https://dsd.maryland.gov/regulations/Pages/26.08.02.03-2.aspx","source_sha256":"9924bc5fb2d109930b06f840cd56b722bdab36dfe897e28897e658512be1f9bd","fetched_at":"2026-10-09","section":"COMAR 26.08.02.03-2 G, Table 4 (drinking water MCL)","page":null,"quote":"Trihalomethanes 1 80 0.08"}},{"id":"b4fe72307b8eae61","parameter":"Total trihalomethanes (TTHM)","value":"0.080","value_num":0.08,"unit":"mg/L","direction":"max","kind":"limit","medium":"drinking_water","level":"national","parameter_key":"name:total trihalomethanes","place":["US"],"conditions":["40 CFR 141.2: Maximum contaminant level means the maximum permissible level of a contaminant in water which is delivered to any user of a public water system."],"cite":{"instrument":"us_npdwr","title":"40 CFR Part 141 — National Primary Drinking Water Regulations (eCFR, as of 2026-08-01)","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"eCFR as of 2026-08-01","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-01/title-40.xml?part=141","source_sha256":"bd534eb2d8af38e141e1cd6236134a638298fbf14791b30279eeb47d815d7767","fetched_at":"2026-08-29","section":"141.64","page":null,"quote":null,"column":"mcl"}}],"next":[{"tool":"check_values","says":"Has your user measured this? check_values sets each of their results beside every row held here, with a verdict and the row's cite.","arguments":{"place":"US-MD"},"needs":{"rows":"Your user's measured results, as their table prints them: [{parameter: \"trihalomethanes\", value, unit}, ...], any other parameters too."},"post":"/api/v1/check"},{"tool":"read_certificate","says":"Has your user a laboratory certificate? read_certificate reads every row it prints, each with its page, and checks them against these limits.","arguments":{"place":"US-MD"},"needs":{"content_base64":"The laboratory's certificate (PDF) or its XLSX, XLS or CSV export, as base64; or file_url, a public https address of it."},"post":"/api/v1/certificate"}]}