{"query":{"parameter":"solids dissolved and salinity","place":"US-MA","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-MA","US"],"parameter_keys":["name:solids (dissolved) and salinity","name:solids dissolved and salinity"],"names_matched":[["solids dissolved and salinity","name:solids (dissolved) and salinity"],["solids dissolved and salinity","name:solids dissolved and salinity"]],"match":"exact","order":"The place's own instruments first, then each place above it, each in its register's order"},"total":2,"offset":0,"returned":2,"next_offset":null,"rows":[{"id":"05f8140462a53f06","parameter":"Solids (Dissolved) and Salinity","value":"250,000","value_num":250000,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:solids (dissolved) and salinity","place":["US-MA"],"conditions":["receiving_water is freshwater","waters used as public water supplies (exposure: drinking water plus fish & shellfish consumption)"],"cite":{"instrument":"us_ma_wqs","title":"314 CMR 4.00 Massachusetts Surface Water Quality Standards: Table 29 generally applicable criteria (29a aquatic life, 29b human health) and 4.05 class dissolved oxygen and pH","issuer":"Commonwealth of Massachusetts, Department of Environmental Protection","edition":"314 CMR 4.00 effective May 1, 2023 (Table 29 as revised 11/12/21), as US EPA posts it in effect for Clean Water Act purposes (EPA has taken no action on Table 29a's diazinon revision)","source_url":"https://www.epa.gov/system/files/documents/2023-06/mawqs-2023.pdf","source_sha256":"fbd41bea9b0ac291b23023ff580ca4349b2b3a6269225bd3218a56037aca1309","fetched_at":"2026-10-10","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"314 CMR 4.06(6)(d) Table 29b","page":174,"quote":null}},{"id":"a91dde8791cd812d","parameter":"Solids Dissolved and Salinity","value":"250,000","value_num":250000,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"national","parameter_key":"name:solids dissolved and salinity","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":"not verified"},"section":"National Recommended Water Quality Criteria — Human Health Criteria Table","page":null,"quote":"Solids Dissolved and Salinity — 250,000 — 1986"}}],"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-MA"},"needs":{"rows":"Your user's measured results, as their table prints them: [{parameter: \"solids dissolved and salinity\", 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-MA"},"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"}]}