{"query":{"parameter":"benzidine","place":"US-NH","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-NH","US"],"parameter_keys":["cas:92-87-5","cas:91-94-1","cas:119-90-4","cas:119-93-7"],"names_matched":[["benzidine","cas:92-87-5"],["dichloro 3 3 benzidine","cas:91-94-1"],["1 1 biphenyl 4 4 diamine 3 3 dichloro","cas:91-94-1","1 1 biphenyl 4 4 diamine"],["1 1 biphenyl 4 4 diamine 3 3 dimethoxy","cas:119-90-4","1 1 biphenyl 4 4 diamine"],["1 1 biphenyl 4 4 diamine 3 3 dimethyl","cas:119-93-7","1 1 biphenyl 4 4 diamine"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order","not_sent":{"rows":15,"names":["Dichlorobenzidine, 3,3'-","Dimethoxybenzidine, 3,3'-","Dimethylbenzidine, 3,3'-","3,3'-Dichlorobenzidine"],"says":"15 rows share a parameter key with a longer name holding \"benzidine\" but are printed under names without these words (that key is wider than the name), or keyed to a CAS number \"benzidine\" does not name (another substance, whatever words its name holds): not sent. Ask for one by its name or CAS number."}},"total":11,"offset":0,"returned":11,"next_offset":null,"rows":[{"id":"ca46396cc9d6cb95","parameter":"Benzidine","value":"2,500","value_num":2500,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:92-87-5","place":["US-NH"],"conditions":["receiving_water is freshwater"],"cite":{"instrument":"us_nh_wqs","title":"New Hampshire Env-Wq 1700 Surface Water Quality Regulations: Table 1703-1 water quality criteria for toxic substances (fresh and marine acute/chronic aquatic life; human health), and class dissolved oxygen and pH","issuer":"State of New Hampshire, Department of Environmental Services","edition":"Env-Wq 1700 effective December 13, 2022 as US EPA posts it in effect for CWA purposes (cover page April 6, 2023), with the human health columns from the February 13, 2015 rule EPA also posts (its 2022 revisions still under EPA review); the state re-adopted Env-Wq 1700 effective 2-26-25 (#14203), not what EPA posts","source_url":"https://www.epa.gov/system/files/documents/2023-04/wqs-nh-chapter1700-2022.pdf","source_sha256":"6749401e33fb746b1a37e31e356dbaa9ccff1f936edc9cd3948b1bae47c796f2","fetched_at":"2026-10-10","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"Env-Wq 1703.21 Table 1703-1","page":18,"quote":null}},{"id":"21c4125071203ee2","parameter":"Benzidine","value":"0.12 ngc","value_num":0.00012,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:92-87-5","place":["US-NH"],"conditions":["receiving_water is freshwater","water and fish ingestion (Table 1703.1's 'Water & Fish Ingestion' column; held for fresh water, tidal water not being drunk)"],"cite":{"instrument":"us_nh_wqs","title":"New Hampshire Env-Wq 1700 Surface Water Quality Regulations: Table 1703-1 water quality criteria for toxic substances (fresh and marine acute/chronic aquatic life; human health), and class dissolved oxygen and pH","issuer":"State of New Hampshire, Department of Environmental Services","edition":"Env-Wq 1700 effective December 13, 2022 as US EPA posts it in effect for CWA purposes (cover page April 6, 2023), with the human health columns from the February 13, 2015 rule EPA also posts (its 2022 revisions still under EPA review); the state re-adopted Env-Wq 1700 effective 2-26-25 (#14203), not what EPA posts","source_url":"https://www.epa.gov/system/files/documents/2023-04/wqs-nh-chapter1700-2022.pdf","source_sha256":"6749401e33fb746b1a37e31e356dbaa9ccff1f936edc9cd3948b1bae47c796f2","fetched_at":"2026-10-10","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"Env-Wq 1703.21 Table 1703.1 (2015)","page":20,"quote":null}},{"id":"82983d555c9f5146","parameter":"Benzidine","value":"0.54 ngc","value_num":0.00054,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:92-87-5","place":["US-NH"],"conditions":["receiving_water is freshwater"],"cite":{"instrument":"us_nh_wqs","title":"New Hampshire Env-Wq 1700 Surface Water Quality Regulations: Table 1703-1 water quality criteria for toxic substances (fresh and marine acute/chronic aquatic life; human health), and class dissolved oxygen and pH","issuer":"State of New Hampshire, Department of Environmental Services","edition":"Env-Wq 1700 effective December 13, 2022 as US EPA posts it in effect for CWA purposes (cover page April 6, 2023), with the human health columns from the February 13, 2015 rule EPA also posts (its 2022 revisions still under EPA review); the state re-adopted Env-Wq 1700 effective 2-26-25 (#14203), not what EPA posts","source_url":"https://www.epa.gov/system/files/documents/2023-04/wqs-nh-chapter1700-2022.pdf","source_sha256":"6749401e33fb746b1a37e31e356dbaa9ccff1f936edc9cd3948b1bae47c796f2","fetched_at":"2026-10-10","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"Env-Wq 1703.21 Table 1703.1 (2015)","page":20,"quote":null}},{"id":"c009343c5054d368","parameter":"Benzidine","value":"0.54 ngc","value_num":0.00054,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:92-87-5","place":["US-NH"],"conditions":["receiving_water is marine"],"cite":{"instrument":"us_nh_wqs","title":"New Hampshire Env-Wq 1700 Surface Water Quality Regulations: Table 1703-1 water quality criteria for toxic substances (fresh and marine acute/chronic aquatic life; human health), and class dissolved oxygen and pH","issuer":"State of New Hampshire, Department of Environmental Services","edition":"Env-Wq 1700 effective December 13, 2022 as US EPA posts it in effect for CWA purposes (cover page April 6, 2023), with the human health columns from the February 13, 2015 rule EPA also posts (its 2022 revisions still under EPA review); the state re-adopted Env-Wq 1700 effective 2-26-25 (#14203), not what EPA posts","source_url":"https://www.epa.gov/system/files/documents/2023-04/wqs-nh-chapter1700-2022.pdf","source_sha256":"6749401e33fb746b1a37e31e356dbaa9ccff1f936edc9cd3948b1bae47c796f2","fetched_at":"2026-10-10","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"Env-Wq 1703.21 Table 1703.1 (2015)","page":20,"quote":null}},{"id":"eda4dc39079ecf13","parameter":"Benzidine","value":"0.00014","value_num":0.00014,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"national","parameter_key":"cas:92-87-5","place":["US"],"conditions":["EPA's recommendation under Clean Water Act § 304(a): 'State and Tribal governments may use these criteria or use them as guidance in developing their own' — it binds a water once the state adopts it for the water's designated use","receiving_water is freshwater","consumption of water + organism: a water designated a drinking-water source and for fish and shellfish (a designated use the state assigns)"],"cite":{"instrument":"us_nrwqc_human_health","title":"EPA National Recommended Water Quality Criteria — Human Health Criteria Table (water + organism, organism only)","issuer":"U.S. Environmental Protection Agency","edition":"EPA web table (fetched 2026-10-09); each criterion carries its publication year","source_url":"https://www.epa.gov/wqc/national-recommended-water-quality-criteria-human-health-criteria-table","source_sha256":"a0229d5a613672b46a000c5b9925dd3a23c3e05914bb020b7f739c69cecbb5fe","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"National Recommended Water Quality Criteria — Human Health Criteria Table","page":null,"quote":"Benzidine (P) 92875 0.00014 0.011 2015"}},{"id":"a3ed9cb0344a4d07","parameter":"Benzidine","value":"0.011","value_num":0.011,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"national","parameter_key":"cas:92-87-5","place":["US"],"conditions":["EPA's recommendation under Clean Water Act § 304(a): 'State and Tribal governments may use these criteria or use them as guidance in developing their own' — it binds a water once the state adopts it for the water's designated use","receiving_water is freshwater","consumption of organism only: a water designated for fish and shellfish taken from it, not a drinking-water source (fresh or salt)"],"cite":{"instrument":"us_nrwqc_human_health","title":"EPA National Recommended Water Quality Criteria — Human Health Criteria Table (water + organism, organism only)","issuer":"U.S. Environmental Protection Agency","edition":"EPA web table (fetched 2026-10-09); each criterion carries its publication year","source_url":"https://www.epa.gov/wqc/national-recommended-water-quality-criteria-human-health-criteria-table","source_sha256":"a0229d5a613672b46a000c5b9925dd3a23c3e05914bb020b7f739c69cecbb5fe","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"National Recommended Water Quality Criteria — Human Health Criteria Table","page":null,"quote":"Benzidine (P) 92875 0.00014 0.011 2015"}},{"id":"50b3e8818e79a78b","parameter":"Benzidine","value":"0.011","value_num":0.011,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"national","parameter_key":"cas:92-87-5","place":["US"],"conditions":["EPA's recommendation under Clean Water Act § 304(a): 'State and Tribal governments may use these criteria or use them as guidance in developing their own' — it binds a water once the state adopts it for the water's designated use","receiving_water is marine","consumption of organism only: a water designated for fish and shellfish taken from it, not a drinking-water source (fresh or salt)"],"cite":{"instrument":"us_nrwqc_human_health","title":"EPA National Recommended Water Quality Criteria — Human Health Criteria Table (water + organism, organism only)","issuer":"U.S. Environmental Protection Agency","edition":"EPA web table (fetched 2026-10-09); each criterion carries its publication year","source_url":"https://www.epa.gov/wqc/national-recommended-water-quality-criteria-human-health-criteria-table","source_sha256":"a0229d5a613672b46a000c5b9925dd3a23c3e05914bb020b7f739c69cecbb5fe","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"National Recommended Water Quality Criteria — Human Health Criteria Table","page":null,"quote":"Benzidine (P) 92875 0.00014 0.011 2015"}},{"id":"4add2e1c796af5dd","parameter":"Benzidine","value":"0.00053","value_num":0.00053,"unit":"mg/kg","direction":"max","kind":"guideline","medium":"soil","level":"national","parameter_key":"cas:92-87-5","place":["US"],"conditions":["Resident Soil (mg/kg)"],"cite":{"instrument":"us_rsl_soil","title":"US EPA — Regional Screening Levels (RSLs), Summary Table (TR=1E-06, THQ=1.0), November 2024 — Soil","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"November 2024","source_url":"https://semspub.epa.gov/src/document/HQ/405270","source_sha256":"0160dc81b4f55d738a354a74de92488f149946ebfa7c6a6c64592f45348043d7","fetched_at":"2026-09-19","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":null,"page":null,"quote":null,"table":"sols","column":"residentiel"}},{"id":"e93c57fbfd29537c","parameter":"Benzidine","value":"0.01","value_num":0.01,"unit":"mg/kg","direction":"max","kind":"guideline","medium":"soil","level":"national","parameter_key":"cas:92-87-5","place":["US"],"conditions":["Industrial Soil (mg/kg)"],"cite":{"instrument":"us_rsl_soil","title":"US EPA — Regional Screening Levels (RSLs), Summary Table (TR=1E-06, THQ=1.0), November 2024 — Soil","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"November 2024","source_url":"https://semspub.epa.gov/src/document/HQ/405270","source_sha256":"0160dc81b4f55d738a354a74de92488f149946ebfa7c6a6c64592f45348043d7","fetched_at":"2026-09-19","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":null,"page":null,"quote":null,"table":"sols","column":"industriel"}},{"id":"c46354a3baf1bbe6","parameter":"Benzidine","value":"2.8e-07","value_num":2.8e-7,"unit":"mg/kg","direction":"max","kind":"guideline","medium":"soil","level":"national","parameter_key":"cas:92-87-5","place":["US"],"conditions":["Protection of Groundwater SSLs: Risk-based SSL (mg/kg); SSL values are based on DAF=1"],"cite":{"instrument":"us_rsl_soil","title":"US EPA — Regional Screening Levels (RSLs), Summary Table (TR=1E-06, THQ=1.0), November 2024 — Soil","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"November 2024","source_url":"https://semspub.epa.gov/src/document/HQ/405270","source_sha256":"0160dc81b4f55d738a354a74de92488f149946ebfa7c6a6c64592f45348043d7","fetched_at":"2026-09-19","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":null,"page":null,"quote":null,"table":"ssl","column":"risque"}},{"id":"d7cdbe19d36ff525","parameter":"Benzidine","value":"0.00011","value_num":0.00011,"unit":"µg/L","direction":"max","kind":"guideline","medium":"drinking_water","level":"national","parameter_key":"cas:92-87-5","place":["US"],"conditions":["Tap Water (ug/L): Regional Screening Level (RSL) Summary Table (TR=1E-06, HQ=1) November 2024"],"cite":{"instrument":"us_rsl_tapwater","title":"US EPA — Regional Screening Levels (RSLs), Summary Table (TR=1E-06, THQ=1.0), November 2024 — Tap Water","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"November 2024","source_url":"https://semspub.epa.gov/src/document/HQ/405270","source_sha256":"0160dc81b4f55d738a354a74de92488f149946ebfa7c6a6c64592f45348043d7","fetched_at":"2026-09-19","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":null,"page":null,"quote":null,"table":"eau","column":"eau_robinet"}}],"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-NH"},"needs":{"rows":"Your user's measured results, as their table prints them: [{parameter: \"benzidine\", 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-NH"},"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"}]}