{"dataset":{"name":"U.S. Drinking Water Quality — Contaminant Measurements","license":"https://creativecommons.org/licenses/by/4.0/","homepage":"https://www.thewatermap.com"},"meta":{"generatedAt":"2026-06-04T01:51:38.418Z"},"system":{"slug":"ca__heritage-ranch-csd__CA4010012","name":"Heritage Ranch Csd — Paso Robles, Ca","state":"CA","year":2023,"url":"https://www.thewatermap.com/water/ca/heritage-ranch-csd-paso-robles-ca/2023","apiUrl":"https://www.thewatermap.com/api/water/ca/heritage-ranch-csd-paso-robles-ca/2023","markdownUrl":"https://www.thewatermap.com/water/ca/heritage-ranch-csd-paso-robles-ca/2023/llms.txt","coordinates":{"latitude":35.6262618,"longitude":-120.6901319},"contaminantsMeasured":8,"contaminantsWithFederalLimit":3,"contaminantsAtOrAboveLimit":1,"contaminantsApproachingLimit":0,"source":{"type":"Consumer Confidence Report (CCR)","description":"Figures are transcribed from the water utility's own annual Consumer Confidence Report, cross-checked by a second model, and approved by a person before publishing."},"families":[{"family":"disinfectant","familyLabel":"Disinfectants","contaminants":[{"analyteId":"chlorine","name":"Chlorine","family":"disinfectant","familyLabel":"Disinfectants","casrn":null,"whatItIs":"A disinfectant added to drinking water to kill bacteria and viruses.","whyItMatters":"Effective and necessary, but high residual levels can cause taste and odor issues; the EPA caps the residual disinfectant level.","measured":{"value":0.97,"low":0.68,"high":0.97,"kind":"range","display":"0.68–0.97","units":"mg/L","statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"0.68-0.97"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.97,"low":0.68,"high":0.97,"kind":"range","display":"0.68–0.97","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"0.68-0.97"},{"value":0.83,"low":null,"high":null,"kind":"point","display":"0.83","units":"mg/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"0.83"}]}]},{"family":"disinfection_byproduct","familyLabel":"Disinfection byproducts","contaminants":[{"analyteId":"haa5","name":"HAA5","family":"disinfection_byproduct","familyLabel":"Disinfection byproducts","casrn":null,"whatItIs":"Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter.","whyItMatters":"Long-term exposure above the federal limit is associated with an increased cancer risk.","measured":{"value":76,"low":33,"high":76,"kind":"range","display":"33–76","units":"ug/L","statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"33-76"},"federalStandard":null,"status":{"key":"over","label":"At or above the limit"},"breakdowns":[],"measurements":[{"value":62,"low":null,"high":null,"kind":"point","display":"62","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"62"},{"value":76,"low":33,"high":76,"kind":"range","display":"33–76","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"33-76"}]}]},{"family":"inorganic","familyLabel":"Inorganic chemicals","contaminants":[{"analyteId":"fluoride","name":"Fluoride","family":"inorganic","familyLabel":"Inorganic chemicals","casrn":"16984-48-8","whatItIs":"A mineral often added to drinking water to help prevent tooth decay.","whyItMatters":"Beneficial at low levels, but long-term exposure above the federal limit can cause bone disease and tooth mottling.","measured":{"value":0.1,"low":null,"high":null,"kind":"point","display":"0.1","units":"mg/L","statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"0.1"},"federalStandard":{"type":"MCL","value":4,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.1,"low":null,"high":null,"kind":"point","display":"0.1","units":"mg/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"0.1"},{"value":0.1,"low":0.1,"high":0.1,"kind":"range","display":"0.1–0.1","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"0.1-0.1"}]}]},{"family":"metal","familyLabel":"Metals","contaminants":[{"analyteId":"aluminum","name":"Aluminum","family":"metal","familyLabel":"Metals","casrn":"7429-90-5","whatItIs":"A common element sometimes used as a treatment coagulant.","whyItMatters":"Regulated only as a secondary (cosmetic) standard; high levels can discolor water.","measured":{"value":40,"low":0,"high":40,"kind":"range","display":"0–40","units":"ug/L","statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"ND-40"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":40,"low":0,"high":40,"kind":"range","display":"0–40","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"ND-40"},{"value":20,"low":null,"high":null,"kind":"point","display":"20","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"20"}]},{"analyteId":"barium","name":"Barium","family":"metal","familyLabel":"Metals","casrn":"7440-39-3","whatItIs":"A metal from erosion of natural deposits and industrial discharge.","whyItMatters":"Long-term exposure above the federal limit can raise blood pressure.","measured":{"value":33.6,"low":0,"high":33.6,"kind":"range","display":"0–33.6","units":"ug/L","statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"ND-33.6"},"federalStandard":{"type":"MCL","value":2000,"units":"ug/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":33.6,"low":0,"high":33.6,"kind":"range","display":"0–33.6","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"ND-33.6"},{"value":16.8,"low":null,"high":null,"kind":"point","display":"16.8","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"16.8"}]},{"analyteId":"copper","name":"Copper","family":"metal","familyLabel":"Metals","casrn":"7440-50-8","whatItIs":"A metal that enters water from corroding household plumbing.","whyItMatters":"Short-term exposure causes stomach distress; long-term exposure can damage the liver and kidneys.","measured":{"value":0.426,"low":null,"high":null,"kind":"point","display":"0.426","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","censored":false,"detectionLimit":null,"rawVerbatim":"0.426"},"federalStandard":{"type":"AL","value":1.3,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.426,"low":null,"high":null,"kind":"point","display":"0.426","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","rawVerbatim":"0.426"}]},{"analyteId":"lead","name":"Lead","family":"metal","familyLabel":"Metals","casrn":"7439-92-1","whatItIs":"A toxic metal that leaches into water from old service lines, solder, and plumbing fixtures.","whyItMatters":"There is no safe level of lead; it harms brain development in children and raises blood pressure in adults. The EPA sets an action level, not a health goal above zero.","measured":{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"p90","samplingContext":"at_the_tap","censored":true,"detectionLimit":null,"rawVerbatim":"ND"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":10,"low":null,"high":null,"kind":"point","display":"10","units":"ug/L","statisticType":"reported_level","samplingContext":"plant:No. of samples collected","rawVerbatim":"10"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"p90","samplingContext":"at_the_tap","rawVerbatim":"ND"}]},{"analyteId":"nickel","name":"Nickel","family":"metal","familyLabel":"Metals","casrn":"7440-02-0","whatItIs":"A metal from natural deposits and industrial discharge.","whyItMatters":"Long-term exposure can cause skin and other effects; monitored under EPA rules.","measured":{"value":1,"low":0,"high":1,"kind":"range","display":"0–1","units":"ug/L","statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"ND-1"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":0.5,"low":null,"high":null,"kind":"point","display":"0.5","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"0.5"},{"value":1,"low":0,"high":1,"kind":"range","display":"0–1","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"ND-1"}]}]}],"contaminants":[{"analyteId":"chlorine","name":"Chlorine","family":"disinfectant","familyLabel":"Disinfectants","casrn":null,"whatItIs":"A disinfectant added to drinking water to kill bacteria and viruses.","whyItMatters":"Effective and necessary, but high residual levels can cause taste and odor issues; the EPA caps the residual disinfectant level.","measured":{"value":0.97,"low":0.68,"high":0.97,"kind":"range","display":"0.68–0.97","units":"mg/L","statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"0.68-0.97"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.97,"low":0.68,"high":0.97,"kind":"range","display":"0.68–0.97","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"0.68-0.97"},{"value":0.83,"low":null,"high":null,"kind":"point","display":"0.83","units":"mg/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"0.83"}]},{"analyteId":"haa5","name":"HAA5","family":"disinfection_byproduct","familyLabel":"Disinfection byproducts","casrn":null,"whatItIs":"Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter.","whyItMatters":"Long-term exposure above the federal limit is associated with an increased cancer risk.","measured":{"value":76,"low":33,"high":76,"kind":"range","display":"33–76","units":"ug/L","statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"33-76"},"federalStandard":null,"status":{"key":"over","label":"At or above the limit"},"breakdowns":[],"measurements":[{"value":62,"low":null,"high":null,"kind":"point","display":"62","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"62"},{"value":76,"low":33,"high":76,"kind":"range","display":"33–76","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"33-76"}]},{"analyteId":"fluoride","name":"Fluoride","family":"inorganic","familyLabel":"Inorganic chemicals","casrn":"16984-48-8","whatItIs":"A mineral often added to drinking water to help prevent tooth decay.","whyItMatters":"Beneficial at low levels, but long-term exposure above the federal limit can cause bone disease and tooth mottling.","measured":{"value":0.1,"low":null,"high":null,"kind":"point","display":"0.1","units":"mg/L","statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"0.1"},"federalStandard":{"type":"MCL","value":4,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.1,"low":null,"high":null,"kind":"point","display":"0.1","units":"mg/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"0.1"},{"value":0.1,"low":0.1,"high":0.1,"kind":"range","display":"0.1–0.1","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"0.1-0.1"}]},{"analyteId":"aluminum","name":"Aluminum","family":"metal","familyLabel":"Metals","casrn":"7429-90-5","whatItIs":"A common element sometimes used as a treatment coagulant.","whyItMatters":"Regulated only as a secondary (cosmetic) standard; high levels can discolor water.","measured":{"value":40,"low":0,"high":40,"kind":"range","display":"0–40","units":"ug/L","statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"ND-40"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":40,"low":0,"high":40,"kind":"range","display":"0–40","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"ND-40"},{"value":20,"low":null,"high":null,"kind":"point","display":"20","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"20"}]},{"analyteId":"barium","name":"Barium","family":"metal","familyLabel":"Metals","casrn":"7440-39-3","whatItIs":"A metal from erosion of natural deposits and industrial discharge.","whyItMatters":"Long-term exposure above the federal limit can raise blood pressure.","measured":{"value":33.6,"low":0,"high":33.6,"kind":"range","display":"0–33.6","units":"ug/L","statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"ND-33.6"},"federalStandard":{"type":"MCL","value":2000,"units":"ug/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":33.6,"low":0,"high":33.6,"kind":"range","display":"0–33.6","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"ND-33.6"},{"value":16.8,"low":null,"high":null,"kind":"point","display":"16.8","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"16.8"}]},{"analyteId":"copper","name":"Copper","family":"metal","familyLabel":"Metals","casrn":"7440-50-8","whatItIs":"A metal that enters water from corroding household plumbing.","whyItMatters":"Short-term exposure causes stomach distress; long-term exposure can damage the liver and kidneys.","measured":{"value":0.426,"low":null,"high":null,"kind":"point","display":"0.426","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","censored":false,"detectionLimit":null,"rawVerbatim":"0.426"},"federalStandard":{"type":"AL","value":1.3,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.426,"low":null,"high":null,"kind":"point","display":"0.426","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","rawVerbatim":"0.426"}]},{"analyteId":"lead","name":"Lead","family":"metal","familyLabel":"Metals","casrn":"7439-92-1","whatItIs":"A toxic metal that leaches into water from old service lines, solder, and plumbing fixtures.","whyItMatters":"There is no safe level of lead; it harms brain development in children and raises blood pressure in adults. The EPA sets an action level, not a health goal above zero.","measured":{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"p90","samplingContext":"at_the_tap","censored":true,"detectionLimit":null,"rawVerbatim":"ND"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":10,"low":null,"high":null,"kind":"point","display":"10","units":"ug/L","statisticType":"reported_level","samplingContext":"plant:No. of samples collected","rawVerbatim":"10"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"p90","samplingContext":"at_the_tap","rawVerbatim":"ND"}]},{"analyteId":"nickel","name":"Nickel","family":"metal","familyLabel":"Metals","casrn":"7440-02-0","whatItIs":"A metal from natural deposits and industrial discharge.","whyItMatters":"Long-term exposure can cause skin and other effects; monitored under EPA rules.","measured":{"value":1,"low":0,"high":1,"kind":"range","display":"0–1","units":"ug/L","statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"ND-1"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":0.5,"low":null,"high":null,"kind":"point","display":"0.5","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"0.5"},{"value":1,"low":0,"high":1,"kind":"range","display":"0–1","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"ND-1"}]}]}}